Some features of Daewoo Nexia engines. Description of the design of the engine management system A15SMS and F16D3 Daewoo Nexia N150 Pros and cons

Engine A15SMS Daewoo cars Nexia, Chevrolet Lanos petrol, four-stroke, four-cylinder, in-line, eight-valve, overhead camshaft.

The A15SMS engine is located in engine compartment transversely The operating order of the cylinders is: 1-3-4-2, counting from the auxiliary drive pulley.

Engine power system A15SMS Daewoo cars Nexia, Chevrolet Lanos - phased distributed fuel injection (Euro-3 toxicity standards).

Engine A15SMS cars Daewoo Nexia, Chevrolet Lanos with a gearbox and clutch form a power unit - a single unit mounted in the engine compartment on three elastic rubber-metal supports.

The right support is attached to a bracket located on the front wall of the cylinder block, and the left and rear ones are attached to the gearbox housing brackets.

Fig.1. Engine A15SMS of Daewoo Nexia, Chevrolet Lanos (rear view)

1 - oil drain plug; 2 - oil pan; 3 - flywheel; 4 - cylinder block; 5 - knock sensor; 6 - crankcase ventilation pipe; 7 - supply pipe of the coolant pump; 8 - cylinder head; 9 - fuel pressure regulator; 10 - ignition coil; 11 - oil filler cap; 12 - intake manifold of A15SMS car engine, Daewoo Nexia Chevrolet Lanos ; 13 - regulator idle move ; 14 - throttle position sensor; 15 - rear timing drive cover; 16 - phase sensor; 17 - generator; 18 - generator drive belt; 19 - generator bracket; 20 - position sensor crankshaft ; 21 - sensor insufficient pressure

oils; 22 - adsorber purge valve

On the right side of the A15SMS engine of Daewoo Nexia and Chevrolet Lanos are located: timing drive, gas distribution mechanism and coolant pump (toothed belt), generator and power steering pump drive (V-ribbed belt), air conditioning compressor drive (V-belt), oil pump, thermostat, sensor crankshaft position.

On the left are the ignition coil and coolant temperature sensor.

Fig.2. Engine A15SMS of Daewoo Nexia, Chevrolet Lanos (left view) catalytic converter; 4 - an exhaust manifold; 5 - oil level indicator; 6 - cylinder head; 7 - coolant temperature sensor; 8 - ignition coil; 9 - oil filler cap; 10 - exhaust gas recirculation valve of the A15SMS Chevrolet Lanos engine; 11 - intake manifold; 12 - fuel pressure regulator; 13 - fuel rail; 14 - nozzle; 15 - adsorber purge valve; 16 - supply pipe of the coolant pump

Fig.3. Engine A15SMS A15SMS of Daewoo Nexia, Chevrolet Lanos (right view)

1 - oil pan; 2 - drive pulley auxiliary units; 3 - oil drain plug; 4 - generator drive belt; 5 - lower timing cover; 6 - generator bracket; 7 - generator; 8 - generator drive belt tension bar; 9 - throttle assembly; 10 - recirculation valve; 11 - coolant temperature indicator sensor; 12 - oil filler cap; 13 - cover block heads cylinders; 14 - top cover timing drive of the A15SMS engine of Daewoo Nexia, Chevrolet Lanos; 15 - power steering pump pulley; 16 - bracket right support power unit; 17 - catalytic converter; 18 - air conditioning compressor bracket; 19 -

tension roller air conditioning compressor drive belt At the front of the A15SMS engine are installed: exhaust manifold,

oil filter , oil level indicator, spark plugs, air conditioning compressor (bottom right). At the rear are: intake manifold with

throttle assembly

, fuel rail with injectors, exhaust gas recirculation valve, generator, starter, low oil pressure sensor, canister purge valve, phase sensor, knock sensor, coolant pump supply pipe, coolant temperature gauge sensor.

A15SMS Engine Specifications

Model - A15SMS

Engine type - Gasoline, four-stroke, four-cylinder, in-line, eight-valve (SOHC) Location - Front, transverse Supply system -

Distributed injection

fuel Cylinder diameter/piston stroke, mm - 76.5x81.5 Working volume

Chevrolet engine

Lanos, cm3 - 1498

Compression ratio - 9.5

Rated power kW (hp) at crankshaft speed, min–1 - 63 (86) /5 800 Maximum torque Nm at crankshaft speed, min–1 - 130 /3 400 Fuel - Unleaded gasoline with

octane number

Toxicity standards - Euro-3

The A15SMS cylinder block of Daewoo Nexia and Chevrolet Lanos cars is cast from cast iron, the cylinders are bored directly into the block. Cooling jacket and oil channels made in the body of the cylinder block.

At the bottom of the cylinder block there are five crankshaft main bearing supports with removable caps, which are attached to the block with special bolts.

The holes in the A15SMS cylinder block of Daewoo Nexia and Chevrolet Lanos for bearings are processed with installed covers, so the covers are not interchangeable and are marked on the outer surface with numbers (count from the timing pulley).

The A15SMS crankshaft of Daewoo Nexia and Chevrolet Lanos cars is made of high-strength cast iron, with five main and four connecting rod journals. The shaft is equipped with eight counterweights cast integrally with it.

The axial movement of the crankshaft is limited by two shells with thrust flanges of the third main bearing. At the front end (toe) of the crankshaft A15SMS of Daewoo Nexia and Chevrolet Lanos cars the following are installed: toothed pulley

timing drive (timing) and auxiliary drive pulley.

The flywheel is attached to the crankshaft flange with six bolts. It is cast from cast iron and has a pressed steel ring gear for starting the engine with a starter.

Connecting rods A15SMS for Daewoo Nexia and Chevrolet Lanos cars are forged steel, I-section. With their lower heads, the connecting rods are connected through liners to the crankpins of the crankshaft, and with their upper heads - through piston pins to the pistons. Pistons are made of aluminum alloy. The hole for the piston pin is shifted relative to the piston symmetry axis by 0.7 mm to the rear wall of the cylinder block. In the upper part of the piston there are three grooves machined for piston rings. Top two

piston rings

- compression, and the lower one - oil scraper.

Fig.4. Cylinder head A15SMS for Daewoo Nexia, Chevrolet Lanos (cylinder head cover removed)

1 – camshaft; 2 – camshaft bearing housing

A sealing gasket is installed between the block and the cylinder head of the Chevrolet Lanos. There are windows on the front side of the cylinder head exhaust channels, and on the rear side there are inlet port windows. The spark plugs are screwed into the threaded holes of the cylinder head.

Seats and valve guides are pressed into the cylinder head of the A15SMS engine of Daewoo Nexia and Chevrolet Lanos. The valve closes under the action of a single spring. Its lower end rests on the washer, and its upper end rests on a plate held by two crackers.

The crackers folded together have the shape of a truncated cone, and on them inner surface collars are made that fit into the grooves on the valve stem. The valves are driven by the camshaft.

The A15SMS cast iron camshaft of Daewoo Nexia and Chevrolet Lanos cars rotates on five supports (bearings) in an aluminum bearing housing, which is attached to the top of the cylinder head.

The Chevrolet Lanos camshaft is driven by a toothed belt from the crankshaft. The valves are actuated by the camshaft cams through pressure levers, which rest on the hydraulic clearance compensators with one shoulder, and on the valve stems with the other through guide washers.

Fig.5. Timing timing gear drive A15SMS for Daewoo Nexia, Chevrolet Lanos

1 - mark on the rear timing drive cover; 2 - mark on the crankshaft toothed pulley; 3 - crankshaft toothed pulley; 4 - tension roller; 5 - toothed pulley of the coolant pump; 6 - belt; 7 - rear drive cover; 8 - mark on the rear timing drive cover; 9 - mark on the camshaft timing belt of the Chevrolet Lanos engine; 10 - camshaft gear pulley

The use of hydraulic compensators in the valve drive reduces the noise of the gas distribution mechanism and also eliminates its maintenance.

Engine lubrication A15SMS for Daewoo Nexia and Chevrolet Lanos cars is combined. Under pressure, oil is supplied to the main and connecting rod bearings crankshaft, “support-camshaft journal” pairs and hydraulic compensators.

The pressure in the system is created by an oil pump with internal gears and pressure reducing valve. Oil pump attached to the cylinder block with right side. The pump drive gear is mounted on two flats on the crankshaft nose.

The internal combustion engine oil pump A15SMS of Daewoo Nexia and Chevrolet Lanos cars takes oil from the oil pan through the oil receiver and through the oil filter supplies it to the main line of the cylinder block, from which the oil channels extend to the crankshaft main bearings and the oil supply channel to the cylinder head.

The oil filter is full-flow, non-separable, equipped with bypass and anti-drainage valves. Oil is sprayed onto the pistons, cylinder walls and camshaft cams. Excess oil flows through the cylinder head channels into the oil pan.

Crankcase ventilation system ICE Chevrolet Lanos - forced, closed type. The system is designed to reduce the emission of harmful substances from the engine crankcase into the atmosphere.

Thanks to the vacuum in intake manifold gases from the engine crankcase enter under the cylinder head cover through the ventilation hose.

Having passed through the oil separator located in the cylinder head cover, crankcase gases are cleared of oil particles and enter the engine intake tract through the hoses of two circuits: the main circuit and the idle circuit, and then into the cylinders.

Crankcase gases are removed through the main circuit hose at partial and full load modes internal combustion engine operation A15SMS of Daewoo Nexia, Chevrolet Lanos cars in the space in front throttle valve.

Through the idle circuit hose, gases are diverted into the space behind the throttle valve, both in partial and full load modes, and in idle mode.

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Review of the A15SMS engine of the Chevrolet Lanos

The A15SMS Chevrolet Lanos engine is gasoline, four-stroke, four-cylinder, in-line, eight-valve, with an overhead camshaft.

The A15SMS engine is located transversely in the engine compartment. The operating order of the cylinders is: 1-3-4-2, counting from the auxiliary drive pulley.

The Chevrolet Lanos engine power supply system is phased distributed fuel injection (Euro-3 toxicity standards).

The engine with the gearbox and clutch form the power unit - a single unit mounted in the engine compartment on three elastic rubber-metal supports.

The right support is attached to a bracket located on the front wall of the cylinder block, and the left and rear ones are attached to the gearbox housing brackets.

Fig.1. Engine A15SMS Chevrolet Lanos (rear view)

1 - oil drain plug; 2 - oil pan; 3 - flywheel;

4 - cylinder block; 5 - knock sensor; 6 - crankcase ventilation pipe; 7 - supply pipe of the coolant pump; 8 - cylinder head; 9 - fuel pressure regulator; 10 - ignition coil; 11 - oil filler cap; 12 - intake manifold of the Chevrolet Lanos engine; 13 - idle speed regulator; 14 - throttle position sensor; 15 - rear timing drive cover; 16 - phase sensor; 17 - generator; 18 - generator drive belt; 19 - generator bracket; 20 - crankshaft position sensor; 21 - insufficient oil pressure sensor; 22 - adsorber purge valve

On the right side of the Chevrolet Lanos engine are located: timing drive of the gas distribution mechanism and coolant pump (toothed belt), drive of the generator and power steering pump (V-ribbed belt), air conditioning compressor drive (V-belt), oil pump, thermostat, crankshaft position sensor.

Fig.2. Engine A15SMS Chevrolet Lanos (left view)

1 - flywheel; 2 - cylinder block; 3 - catalytic converter; 4 - exhaust manifold; 5 - oil level indicator; 6 - cylinder head; 7 - coolant temperature sensor; 8 - ignition coil; 9 - oil filler cap; 10 - exhaust gas recirculation valve of the A15SMS Chevrolet Lanos engine; 11 - intake manifold; 12 - fuel pressure regulator; 13 - fuel rail; 14 - nozzle; 15 - adsorber purge valve; 16 - supply pipe of the coolant pump

Fig.3. Engine A15SMS Chevrolet Lanos (right view)

At the front of the A15SMS engine are installed: exhaust manifold, oil filter, oil level indicator, spark plugs, air conditioning compressor (bottom right).

At the rear there are: an intake manifold with a throttle assembly, a fuel rail with injectors, an exhaust gas recirculation valve, a generator, a starter, an insufficient oil pressure sensor, a canister purge valve, a phase sensor, a knock sensor, a supply pipe for the coolant pump, and a coolant temperature indicator sensor.

Chevrolet Lanos engine specifications

A15SMS Engine Specifications

Model - A15SMS

Power system - Distributed fuel injection

Distributed injection

Chevrolet Lanos engine displacement, cm3 - 1498

Chevrolet engine

Lanos, cm3 - 1498

Compression ratio - 9.5

Fuel - Unleaded gasoline with an octane rating of at least 92

octane number

Toxicity standards - Euro-3

The Chevrolet Lanos cylinder block is cast from cast iron, the cylinders are bored directly into the block. The cooling jacket and oil channels are made in the body of the cylinder block.

At the bottom of the cylinder block there are five crankshaft main bearing supports with removable caps, which are attached to the block with special bolts.

The holes in the Chevrolet Lanos cylinder block for the bearings are processed with the covers installed, so the covers are not interchangeable and are marked on the outer surface with numbers (count from the timing pulley).

The Chevrolet Lanos crankshaft is made of high-strength cast iron, with five main and four connecting rod journals. The shaft is equipped with eight counterweights cast integrally with it.

The axial movement of the crankshaft is limited by two shells with thrust flanges of the third main bearing.

At the front end (toe) of the Chevrolet Lanos crankshaft there are installed: a timing gear drive pulley and an auxiliary drive pulley.

timing drive (timing) and auxiliary drive pulley.

Chevrolet Lanos connecting rods are forged steel, I-section.

With their lower heads, the connecting rods are connected through liners to the crankpins of the crankshaft, and with their upper heads - through piston pins to the pistons.

piston rings

Pistons are made of aluminum alloy. The hole for the piston pin is shifted relative to the piston symmetry axis by 0.7 mm to the rear wall of the cylinder block. In the upper part of the piston there are three grooves machined for piston rings. The two upper piston rings are compression rings, and the lower one is oil scraper.

Fig.4. Chevrolet Lanos cylinder head (cylinder head cover removed)

1 – camshaft; 2 – camshaft bearing housing

A sealing gasket is installed between the block and the cylinder head of the Chevrolet Lanos. The exhaust port windows are located on the front side of the cylinder head, and the intake port windows are located on the rear side. The spark plugs are screwed into the threaded holes of the cylinder head.

Valve seats and guides are pressed into the cylinder head. The valve closes under the action of a single spring. Its lower end rests on the washer, and its upper end rests on a plate held by two crackers.

The crackers folded together have the shape of a truncated cone, and on their inner surface there are beads that fit into the grooves on the valve stem. The valves are driven by the camshaft.

The Chevrolet Lanos camshaft is cast iron and rotates on five supports (bearings) in an aluminum bearing housing, which is attached to the top of the cylinder head.

Fig.5. Timing mechanism drive Chevrolet Lanos

The use of hydraulic compensators in the valve drive reduces the noise of the gas distribution mechanism and also eliminates its maintenance.

Chevrolet Lanos engine lubrication is combined. Under pressure, oil is supplied to the main and connecting rod bearings of the crankshaft, the support-camshaft journal pairs and hydraulic compensators.

The pressure in the system is created by an oil pump with internal gears and a pressure reducing valve. The oil pump is attached to the cylinder block on the right side. The pump drive gear is mounted on two flats on the crankshaft nose.

The Chevrolet Lanos internal combustion engine oil pump takes oil from the crankcase pan through the oil receiver and delivers it through the oil filter to the main line of the cylinder block, from which the oil channels extend to the crankshaft main bearings and the oil supply channel to the cylinder head.

The Chevrolet Lanos crankcase ventilation system is forced, closed type. The system is designed to reduce the emission of harmful substances from the engine crankcase into the atmosphere.

Due to the vacuum in the intake manifold, gases from the engine crankcase enter under the cylinder head cover through the ventilation hose.

Through the main circuit hose, crankcase gases are discharged at partial and full load modes of operation of the Chevrolet Lanos internal combustion engine into the space in front of the throttle valve.

Through the idle circuit hose, gases are diverted into the space behind the throttle valve, both in partial and full load modes, and in idle mode.

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Chevrolet Aveo

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Chevrolet Captiva

Chevrolet Cruze

The Deo Nexia sedan is very popular in our country, as it combines high level reliability, safety and reasonable cost. This car sells well even in its factory configuration, but many car owners perform tuning to make the car unique and more expressive.

Tuning Deo Nexia allows you to change the car beyond recognition by installing such elements as:

new thresholds;
alloy wheels;
spoiler;
original bumpers and much more.

You can also change a lot in the cabin:

replace standard seats with products with support models;
change the color of the dashboard lighting;
add additional lighting to the interior;
retighten the plastic, etc.

Engine tuning is a topic for separate conversation. For example, you can replace with Deo Nexia camshaft and firmware, significantly increasing the dynamics of the car.

Daewoo Nexia

The difficulties of tuning the power unit of this car are associated with the complexity of the purchase quality spare parts for obsolete and weak engine. Some even consider tuning a 1.5-liter engine with 75 hp. a completely pointless idea. They explain this by the maximum possible increase in power of 30 hp. and a significant reduction in engine life. Not everyone Daewoo owners Nexia agrees with this point of view.

You can purchase a unique tuning kit to replace piston group and timing German made, but such parts are very rare and unreasonably expensive. It is much more profitable to buy, configure and install new engine increased power.

Professional auto mechanics note that when tuning Deo engine Nexia can install a compressor that will pump fuel-air mixture into the motor. It is important to correctly set the pressure generated by this device so as not to damage the power plant.

As practice shows, even not the most expensive, but very reliable domestic compressors can supply a working mixture to the engine cylinders at a pressure much higher than atmospheric pressure. For standard Nexia engines, excessive growth can be fatal. Overdoing it with the increase Horse power, local overheating will occur, which the shafts, connecting rods and pistons may not withstand.

If you plan to tune the Deo Nexia engine by installing a mechanical supercharger, do not set it to a pressure of more than 0.5 atm.

As for the deeper technical tuning power unit of Nexia, it is rarely performed. The following actions can be performed:

Tuning the Deo Nexia engine requires the installation of the following spare parts:

forged pistons;
connecting rods of reinforced design;
lightweight flywheel;
lightweight and reinforced timing belt.

You can't do without enhanced traction and brake pads increased wear resistance.

Serious tuning of 1.5-liter Nexia engines is mainly carried out by street racers, while ordinary car enthusiasts can limit themselves to chip tuning, which we will discuss below.

Appearance

Many motorists start tuning Deo Nexia is not improving technical characteristics, but with the transformation of the exterior, which involves the installation of body kits, spoilers, tinting and other parts. Installing all this completely transforms the vehicle and slightly improves dynamics (by increasing aerodynamic performance).

All work on tuning the appearance of the car can be carried out in your garage, without giving money to the masters service centers. You just need to buy new bumpers, spoilers and sills, and install them instead of the standard ones body parts using a set of regular wrenches and screwdrivers.

Headlight tuning

Tuning is popular standard headlights Deo Nexia. For example, instead of them you can install lensed bi-xenon blocks, and parking lights move to turn signals. In this case, washers can be additionally installed in the bumper. The rear lights are tuned using the same principle. You can also use another tuning method that involves tinting the windows rear lights using a special film or varnish.

Installation of deflectors

Deflectors on the hood and side windows give the car originality and make it more elegant. In addition, these accessories add practicality, since after installing them on the side windows, you can lower the windows in rain and snow, ventilating the interior and preventing fogging.

As for the so-called fly swatters (hood deflector), they do not affect the dynamics, but they do appearance Deo Nexia is more aggressive. In addition, this way you will protect the hood from small chips and other damage from stones and spikes flying out of the wheels of cars in front.

Interior tuning Daewoo Nexia

Salon Deo car Nexia is not made in the best possible way, so every owner, without exception, dreams of upgrading it. In this case, everything depends on your capabilities and imagination. If you have the money, you can replace almost everything:

seats;
upholstery;
backlight and much more.

You can cover the door cards, the seats themselves, and even with leather or any other material. dashboard. All this is not cheap, but the result usually exceeds all expectations. With the new Deo salon, Nexia will become unrecognizable and unique.

Dashboard

A new instrument panel with a liquid crystal display allows you to add originality to the interior. As a rule, brightness adjustment is usually provided, allowing you to customize the panel to suit you. Additionally, you can install a rain sensor, which will automatically turn on the wipers right moment, and you won’t have to take your eyes off the road. If you don't have a lot of money, you can disassemble the dashboard and replace the backlight with any color you like. There is nothing difficult about this if you have free time and some skills in dismantling car interiors.

Replacing seats

The seats in the Daewoo Nexia are far from the most comfortable, so it’s better to lure them in if possible. Instead of standard products you can install new ones from Recaro or another company, equipped with lateral support. Sitting in such chairs is much more comfortable.

You can tune the car with your own hands in any way you like, since there are no limits to your imagination - it all comes down to money. You can look at photos of tuned Nexias in this article or on the Internet and choose the option that suits your taste.

You can install this practical element in your Deo Nexia yourself in garage conditions. Just buy an armrest at a car market or in a specialized store, and install it according to the attached instructions. If you don’t find it, find on the Internet how other car owners cope with this task. As a rule, in 5-10 minutes you can install an armrest that will add comfort to you.

DIY chip tuning Deo Nexia

Chip tuning of the Deo Nexia engine is a simple task. In most cases, control units of the KDAC_ZXJN brand are installed on these machines. Before you start tuning, make sure that the vehicle so as not to aggravate the damage.

What will you need?

For chip tuning you will need the following set of things:

Willem programmer (it's not cheap, so just ask someone to borrow it).
Adapter board from microcircuit to ECU connector.
The Winbond 27C512 microcircuit itself for recording new firmware.
Firmware.

You can buy and find everything you need on specialized forums for Deo Nexia.

How to carry out chip tuning?

Connect the programmer to the computer, following the instructions, and download the firmware found on the network to the chip. Next, you need to remove the terminals from the battery under the hood of the Deo Nexia and find the control unit located at the right front door behind the trim.

Dismantle the block (you don’t have to disconnect it), unscrew a couple of bolts from the top, disconnect the blue chip and insert a new chip with the previously filled firmware. To avoid soldering, use an adapter board.

Replace the unit cover and insert it back. Install the terminals and turn the key in the ignition, but do not start the car. You should hear the fuel pump operating (this is a sign that the actions were performed correctly). If everything is so, start the engine and check its operation for absence of detonations and uneven operation. If something is wrong, try uploading another firmware to the microcircuit, and if none of it works, return the standard microcircuit to its place.

The Daewoo Nexia car in Russia at one time gained extraordinary popularity, but these cars can still be constantly seen on the roads of our country.

This brand has long been the best-selling brand in the territory Russian Federation, and Nexia is still in good demand.

A little history of Daewoo Nexia

The ancestor of the Daewoo Nexia car became well known to many Opel Cadet E, which was produced by a German company from 1984 to 1991. At first, Nexia was produced in Korea under the name Daewoo Racer, and its production continued until 1995. For some time, large-scale assembly of the Nexia was carried out in Krasny Askai, Rostov region, but in 1998, production of the car was discontinued.

Basics made by Daewoo Nexia was established in Uzbekistan in the city of Asaka, the first cars rolled off the assembly line in 1996. Almost immediately the car began to be exported to Russia, and in 2008 Nexia underwent a slight restyling:

new headlights appeared;
bumpers changed;
the trunk lid has become different;
The rear lights have been changed.

There were still very minor external changes, but overall the car remained recognizable and differed only slightly from the pre-restyling Nexia.

The first Uzbek Nexias came in two trim levels:

GL – basic version;
GLE is the luxury version.

The basic equipment was very simple, sometimes it did not even include power steering. In option GLE car equipped with additional options:

electric windows;
hydraulic power steering;
air conditioning;
fog lights;
electric antenna.

At first in model range power units of Daewoo Nexia there was only one Gas engine volume 1.5 l. The engine had a power of 75 hp. p., in-line arrangement of four cylinders.

Engine G15MF – 8 valves, one intake and one exhaust valve per cylinder, in many ways it is very similar to Opel’s C16NZ internal combustion engine. Despite the apparent resemblance, Opel engines and Nexia have significant differences, and on the G15MF engine:

the cylinder diameter is different, respectively, the pistons have a completely different configuration and dimensions;
on crankshaft another casting was made for the oil pump drive;
The oil pump itself has a different drive configuration;
in the cylinder head, instead of a plug at the back, a metal fitting is pressed into place under the cooling system pipe; in addition, the cylinder head has slightly different combustion chambers.

Is there some more whole line design differences, which do not allow the installation of parts from the C16NZ motor on the G15MF engine. In particular, Nexia has its own distributor, and it does not fit any Opel.

The Daewoo Nexia 1.5 engine has the following characteristics:

fuel system type – distributed injection;
location on the car – transverse;
volume – 1498 cm³;
number of valves – 8;
cylinder diameter – 76.5 mm;
piston stroke – 81.5 mm;
diameter of crankshaft journals – 55 mm;
diameter of connecting rod journals – 43 mm.

Although Daewoo engine Nexia 1.5 has 8 valves, a car with it can reach a fairly decent speed (up to 175 km/h) and accelerate to 100 kilometers in 12.5 seconds. In city mode, fuel consumption with the G15MF engine averages 9.3 liters per 100 kilometers, on the highway outside the city - 7 l/100 km, and during dynamic driving, gasoline consumption increases.

8 valve Nexia engine very reliable, and if you take care of it properly (do not overheat, do not overload, change the engine oil on time), then the engine can run without overhaul more than 200 thousand kilometers. It should be noted that some car owners did not spare the engine in their car at all:

they poured the cheapest surrogate oil into it;
forgot to change the oil on time;
did not check the oil level in the crankcase.

If you remove the oil filler cap from such a “dead” engine, you can immediately see blackness on the camshaft, which is formed from low quality oil. However, even such motors miraculously survived, and this shows how reliable they are.

In 2002, some changes were made to the Daewoo Nexia, although it is difficult to call them restyling. But the most main novelty this year - the appearance in the line of power units of a new 16-valve A15MF engine with a volume of 1.5 liters and a power of 85 hp. With.

The main difference between this engine and the 8-valve engine is a completely different cylinder head, in which two camshafts are installed. The power unit no longer has a distributor; it controls the ignition the electronic unit. The cylinder diameter remained the same, but the pistons changed - four grooves for the valves appeared on the bottom. To be honest, the grooves on the pistons do not play a special role - if the timing belt breaks, the valves bend. The 8-valve internal combustion engine G15MF remains the winner in this regard; a broken timing belt on it does not cause damage to the engine.

As for the crankshaft, it remains the same; the interchangeability of the A15MF and G15MF crankshafts is complete. Also, the changes did not affect the oil pump, engine sump, flywheel and clutch. Due to the installation of a more advanced ignition system on the Nexia with a 16-valve engine, fuel consumption has decreased slightly:

in the urban cycle – 9.3 l/100 km;
on the highway outside the city - 6.5 l/100 km.

New engines for 2008

In 2008, in addition to external changes in the back of the Daewoo Nexia the range of engines has been updated:

Instead of the obsolete G15MF engine, the A15SMS internal combustion engine was installed. This power unit uses fuel system from Chevrolet Lanos, the engine began to meet Euro-3 environmental standards;
to replace 16 valve engine A15MF 1.5 l came with a new internal combustion engine model F16D3, volume 1.6 l.

The A15SMS engine has become “stronger” than its predecessor, its power has increased to 89 hp. s., but it also has one “fat” minus - due to the fact that the cylinder head of the new engine is installed from a Lanos, if the timing belt breaks, the valves now “meet” the pistons.

Since 2008, the Daewoo Nexia has been equipped with a new 16-valve engine F16D3, which meets environmental requirements Euro 3 and 4, this engine first appeared on Chevrolet Lacetti. The F16D3 engine was also equipped with Chevrolet model Cruze, the engine prototype was the Opel X14XE power unit. Although the volumes of these engines are different, structurally and externally they are very similar to each other. Both engines have:

timing belt drive;
hydraulic compensators;
two camshafts;
recirculation system exhaust gases.

The F16D3 gasoline engine has the following technical characteristics:

number/location of cylinders – four, in-line;
volume – 1598 cm³;
power – 109 hp;
fuel system - distributed injection;
compression ratio in cylinders – 9.5;
cylinder diameter – 79 mm;
piston stroke – 81.5 mm.

To reduce the toxicity of exhaust gases, an EGR valve is installed on this engine, but from Russian gasoline The recirculation system often becomes coked, and many car owners turn off this valve. The F16D3 engine is not only similar to the X14XE, it also adopted all the diseases from the Opel power unit:

rapid failure of the lambda probe (also due to low-quality fuel);
oil leak from the valve cover;
problems with the thermostat opening earlier than it should.

The leak would not cause much trouble if the oil did not flow into candle wells. Penetrating into the well, the oil hits the electrodes of the spark plug, and the internal combustion engine begins to throttle. But the Daewoo Nexia 1.6 engine rarely consumes oil through the piston rings; in this regard, the engine is reliable.

Like any other car, Daewoo Nexia needs maintenance, and the engine oil must be changed according to the established regulations. The frequency of oil changes on Nexia engines is generally the same as on other models. passenger cars– every 10 thousand km. If operating conditions are severe ( high loads, work in hot climates), it is recommended to change the oil after 5 thousand km.

The engine oil requirements for the Nexia are standard, some special conditions is not applied to them. So that the oil does not burn and blackness does not form on the parts inside the engine, it must be of high quality, with good additives. Mineral oil It is not recommended to fill engines; it is better to use “synthetics” or “semi-synthetics”.

For winter motor oil, the viscosity should be lower, according to SAE classification for frosty winters it is good to use brands 5W30, 0W30, 5W40, 0W40. On thick motor oil when starting in cold weather, intense wear of engine parts occurs, the engine life is reduced, therefore all-season oil Should not be used for internal combustion engines in winter.

It is recommended to fill in almost any oil from well-known world manufacturers, the main thing is that it is not a fake. Often in Daewoo engines Nexia applied oil companies:

Castrol;
Mobil;
Chevron;

It has long been proven that it is fake oil causes the formation of carbon deposits and reduces engine life. The secret here is very simple - the fake does not contain those high-quality additives that have the necessary lubricating properties, reduce friction between rubbing parts.

If “synthetic” is too expensive for the car owner, you can replace it semi-synthetic oil, big trouble won't happen. But when replacing synthetic oil for “semi-synthetic” it is necessary to rinse thoroughly oil system before pouring new oil into the Daewoo Nexia engine.

The A15SMS engine of Daewoo Nexia and Chevrolet Lanos cars is gasoline, four-stroke, four-cylinder, in-line, eight-valve, with an overhead camshaft.

The A15SMS engine is located transversely in the engine compartment. The operating order of the cylinders is: 1-3-4-2, counting from the auxiliary drive pulley.

The A15SMS engine power supply system for Daewoo Nexia and Chevrolet Lanos cars is phased distributed fuel injection (Euro-3 toxicity standards).

The A15SMS engine of Daewoo Nexia and Chevrolet Lanos cars with a gearbox and clutch form a power unit - a single unit mounted in the engine compartment on three elastic rubber-metal supports.

The right support is attached to a bracket located on the front wall of the cylinder block, and the left and rear ones are attached to the gearbox housing brackets.

Fig.1. Engine A15SMS of Daewoo Nexia, Chevrolet Lanos (rear view)

1 - oil drain plug; 2 - oil pan; 3 - flywheel; 4 - cylinder block; 5 - knock sensor; 6 - crankcase ventilation pipe; 7 - supply pipe of the coolant pump; 8 - cylinder head; 9 - fuel pressure regulator; 10 - ignition coil; 11 - oil filler cap; 12 - intake manifold of the A15SMS engine of Daewoo Nexia, Chevrolet Lanos; 13 - idle speed regulator; 14 - throttle position sensor; 15 - rear timing drive cover; 16 - phase sensor; 17 - generator; 18 - generator drive belt; 19 - generator bracket; 20 - crankshaft position sensor; 21 - insufficient oil pressure sensor; 22 - adsorber purge valve

On the left are the ignition coil and coolant temperature sensor.

Fig.2. Engine A15SMS of Daewoo Nexia, Chevrolet Lanos (left view)

Fig.3. Engine A15SMS A15SMS of Daewoo Nexia, Chevrolet Lanos (right view)

1 - oil pan; 2 - auxiliary drive pulley; 3 - oil drain plug; 4 - generator drive belt; 5 - lower timing cover; 6 - generator bracket; 7 - generator; 8 - generator drive belt tension bar; 9 - throttle assembly; 10 - recirculation valve; 11 - coolant temperature indicator sensor; 12 - oil filler cap; 13 - cylinder head cover; 14 - upper timing cover of the A15SMS engine of Daewoo Nexia and Chevrolet Lanos cars; 15 - power steering pump pulley; 16 - bracket for the right support of the power unit; 17 - catalytic converter; 18 - air conditioning compressor bracket; 19 - tension roller of the air conditioning compressor drive belt

At the front of the A15SMS engine are installed: exhaust manifold, oil filter, oil level indicator, spark plugs, air conditioning compressor (bottom right).

A15SMS Engine Specifications

Model - A15SMS

Engine type - Gasoline, four-stroke, four-cylinder, in-line, eight-valve (SOHC)

Model - A15SMS

Power system - Distributed fuel injection

Distributed injection

Chevrolet Lanos engine displacement, cm3 - 1498

Chevrolet engine

Rated power kW (hp) at crankshaft speed, min–1 - 63 (86) /5 800

Maximum torque Nm at crankshaft speed, min–1 - 130 /3 400

Fuel - Unleaded gasoline with an octane rating of at least 92

Ignition system - Electronic, part of the engine management system

Toxicity standards - Euro-3

The A15SMS cylinder block of Daewoo Nexia and Chevrolet Lanos cars is cast from cast iron, the cylinders are bored directly into the block. The cooling jacket and oil channels are made in the body of the cylinder block.

At the bottom of the cylinder block there are five crankshaft main bearing supports with removable caps, which are attached to the block with special bolts.

The crankshaft main and connecting rod bearing shells are steel, thin-walled, with anti-friction coating. The main and connecting rod journals of the crankshaft connect channels located in the shaft body. The axial movement of the crankshaft is limited by two shells with thrust flanges of the third main bearing.

At the front end (toe) of the crankshaft A15SMS of Daewoo Nexia and Chevrolet Lanos cars are installed: a timing gear drive pulley and an auxiliary drive pulley.

The flywheel is attached to the crankshaft flange with six bolts. It is cast from cast iron and has a pressed steel ring gear for starting the engine with a starter.

Pistons are made of aluminum alloy. The hole for the piston pin is shifted relative to the axis of symmetry of the piston by 0.7 mm to the rear wall of the cylinder block. In the upper part of the piston there are three grooves machined for piston rings. The two upper piston rings are compression rings, and the lower one is oil scraper.

Piston pins are steel, tubular section. In the piston holes, the pins are installed with clearance, and in the upper heads of the connecting rods - with interference (pressed in).

The A15SMS cylinder head of Daewoo Nexia and Chevrolet Lanos cars is cast from aluminum alloy, common to all four cylinders. The head is centered on the block with two bushings and secured with ten bolts.

Fig.4. Cylinder head A15SMS for Daewoo Nexia, Chevrolet Lanos (cylinder head cover removed)

1 – camshaft; 2 – camshaft bearing housing

The crackers folded together have the shape of a truncated cone, and on their inner surface there are beads that fit into the grooves on the valve stem. The valves are driven by the camshaft.

The A15SMS cast iron camshaft of Daewoo Nexia and Chevrolet Lanos cars rotates on five supports (bearings) in an aluminum bearing housing, which is attached to the top of the cylinder head.

Fig.5. Timing timing gear drive A15SMS for Daewoo Nexia, Chevrolet Lanos

The use of hydraulic compensators in the valve drive reduces the noise of the gas distribution mechanism and also eliminates its maintenance.

Engine lubrication A15SMS for Daewoo Nexia and Chevrolet Lanos cars is combined. Under pressure, oil is supplied to the main and connecting rod bearings of the crankshaft, the support-camshaft journal pairs and hydraulic compensators.

The Chevrolet Lanos crankcase ventilation system is forced, closed type. The system is designed to reduce emissions harmful substances from the engine crankcase into the atmosphere.

Due to the vacuum in the intake manifold, gases from the engine crankcase enter under the cylinder head cover through the ventilation hose.

After passing through the oil separator located in the cylinder head cover, crankcase gases are cleared of oil particles and enter the intake tract engine through the hoses of two circuits: the main circuit and the idle circuit, and then into the cylinders.

Through the main circuit hose, crankcase gases are discharged in partial and full load modes of operation of the A15SMS internal combustion engine of Daewoo Nexia and Chevrolet Lanos into the space in front of the throttle valve.

Through the idle circuit hose, gases are diverted into the space behind the throttle valve, both in partial and full load modes, and in idle mode.

Source of information Website: http://avtodvc.ru/shevrole_lanos_dvigatel_a15sms.html

Forward

Review of the A15SMS engine of the Chevrolet Lanos

Daewoo Nexia

Appearance

Headlight tuning

Installation of deflectors

Interior tuning Daewoo Nexia

Dashboard

Replacing seats

DIY chip tuning Deo Nexia

What will you need?

How to carry out chip tuning?

A little history of Daewoo Nexia

New engines for 2008

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