Engine for VAZ 2106, technical specifications and repairs


The VAZ 2106 engine is used in small class passenger cars.
It has been produced by the Volzhsky Automobile Plant since 1976. The VAZ 2106 engine cools the system in a closed container using a specially designed liquid. It is located at the very top of the camshaft.

This engine is considered a four-stroke, has a carburetor system and an in-line engine. The liquid inside the motor has forced circulation to quickly cool the container.

The engine has a combined lubrication system. That is, this process occurs under a certain pressure and in the form of splashing. These engines are subject to major overhaul and additional tuning. When the design completely fails, you need to ask how much a new engine for a VAZ 2106 costs and replace it.

Technical characteristics of the motor 2106

After a failure with the timing belt in the internal combustion engine 2105, the manufacturer AvtoVAZ returned to the chain drive. The standard for the 2106 engine was version 2103; the cylinder diameter was increased to the original 79 mm, as in modification 21011.

Therefore, the technical characteristics of the internal combustion engine are important:

ManufacturerVAZ
Engine brandVAZ-2106
Years of production1976 – 2006
Volume1569 cm3 (1.5 l)
Power64-75 hp
Torque87.3 Nm (3400 rpm)
Weight121 kg
Compression ratio8,5
Nutritioncarburetor Solex 1107010-01, then 1107010, since 1980 Ozone 1107010-20
Motor typein-line
Number of cylinders4
Location of the first cylindernear the timing chain
Number of valves on each cylinder2
Cylinder head materialaluminum alloy
Allowable warpagemanifold gaskets (intake/exhaust) 0.08 mm
cylinder head gasket 0.05 mm
Valve seatwidth 2 mm, angle 45°
Camshaftone upper cylinder head inside, phase width 232°, exhaust valve advance 42°, intake valve lag 40°
Camshaft oil sealdiameters – 40 mm, 56 mm, width 7 mm
Cylinder block materialcast iron
Cylinder diameterclass A – 79 – 79.01 mm
class B – 79.01 – 79.02 mm

class C – 79.02 – 79.03 mm

class D – 79.03 – 79.04 mm

class E – 79.04 – 79.05 mm

Pistons and ringspiston made of aluminum alloy with tin coating,
cast iron rings, compression outside chrome plated (top) and beveled (bottom)
Piston diameterclass A – 78.94 – 78.95 mm
class C – 78.96 – 78.97 mm

class E – 78.98 – 78.99 mm

Gapspiston/cylinder wall – 0.153 – 0.173 mm (standard) or 0.19 mm (maximum)
piston rings – 110 mm relative to the cut plane
Upper compression ring1.535 – 1.555 mm
Lower compression ring3.957 – 3.977 mm
Oil scraper ring2.015 – 2.035 mm
Gap between piston groove and ring0.03 – 0.07 mm
Crankshaftcast iron, casting
Number of main bearings5
Gearbox neck diameter50.795 – 50.775 mm
Main journal gap0.1 – 0.5 mm
Connecting rod bearingsshaft journal diameter – 47.814 mm
liner thickness – 1.448 mm

liner width – 28.025 – 28.975 mm

Crankshaft oil sealsfront – diameters 42 mm, 60 mm, width 7 mm
rear – diameters 85 mm, 105 mm, width 10 mm
Piston stroke80 mm
FuelAI-92
Environmental standardsEuro 2
Fuel consumptionhighway – 7.8 l/100 km
combined cycle 9.2 l/100 km

city ​​– 12 l/100 km

Oil consumptionmaximum 0.7 l/1000 km
Engine oil for 21065W-30 – 15W-40
Engine oil volume3.75 l
Replacement frequencyevery 55,000 km
Operating temperature80°
Motor lifedeclared 120,000 km
actual 200,000 km
Adjustment of valvesnuts and feeler gauge
Cooling systemforced
Coolant quantity9.85 l
water pumppolymer impeller, mounted on a block
Ignitiondistributor
Candles for 2106A17-DVR, FE65CPR, A17DV-10
Gap between spark plug electrodes0.5 – 0.6 mm
Valve train chaindouble-row roller, 114 links
Cylinder operating order1-3-4-2
Air filterdry with replaceable cardboard cartridge and pre-cleaner, temperature adjustment according to the season
Oil filterrecommended Mann W914/2
Flywheel129 teeth, 0.62 kg
internal hole diameter – 25.67 mm

outer diameter – 27.75 mm

no offsets

Flywheel mounting boltsM10x1.25 mm, length 23.5 mm,
Valve stem sealsManufacturers Horse or Corteco
Compressionpressure in the cylinders from 10 – 14 bar, pressure difference in individual cylinders within 1 bar
Oil temperature80°С
Thermostat temperature80 – 84°С
Valve pressure inside the radiator cap0.7 – 1 bar
Content of harmful products in the exhaustCH <200%, CO <0.5%
XX speed800 – 900 min-1
Tightening force of threaded connectionsspark plug – 31 – 39 Nm
flywheel – 61 – 87 Nm

clutch bolt - 29.4 Nm

bearing cap – 68 – 84 Nm (main) and 43.32 – 53.51 (connecting rod)

cylinder head – two stages 31 – 41 Nm, 96 – 118 Nm

The engine retains the same intake manifold, exhaust manifold, and other attachments. In principle, the entire line of internal combustion engines produced by the manufacturer of the AvtoVAZ plant, and the 2106 engine in particular, can be repaired with your own hands “on the knee” in the field.


Design of internal combustion engine with timing chain drive

The manual includes a description of the parameters that the manufacturer recommends for its engines.

Reliability, weaknesses, maintainability

Reliability

The reliability of the VAZ-2106 is beyond doubt. The engine is truly durable and reliable. Numerous positive reviews from car owners confirm this.

For example, Andrey from Stavropol states: “... according to the technician, this is the first repair on a VAZ 2106 engine in 27 years of operation with a mileage of 200 thousand km...”.

Dmitry from Smolensk completely agrees with him: “... 195 thousand cars have already been driven on it. I use semi-synthetics. No one climbed into the engine, and the technicians said that it was not necessary. The car is good in winter, when the guys in the yard couldn’t start their jeeps at -30 in -35, my VAZ 2106 started 1-2 times…”.

There are, of course, negative reviews. But in them, the authors themselves agree that on their part there was no proper care of the engine or there was aggressive operation of the machine.

The reliability of the internal combustion engine is stubbornly indicated by the fact that the engine's mileage has exceeded its service life. With timely and high-quality maintenance, the engine can last up to 400 thousand km without major repairs.

The concept of safety factor plays an important role in reliability. VAZ-2106 can be boosted to 200 hp. With.

It must be remembered that such tuning negates the durability of the unit. Mileage is reduced tenfold. And the costs of remaking the engine are also not cheap. For lovers of powerful engines, an engine swap would be the most suitable option.

Another indicator of the reliability of the unit is its modernization. Based on the VAZ-2106, several versions of this engine were created, which were used on various models of VAZ cars.

Weak spots

The VAZ-2106 has weaknesses inherent in all VAZ engines. It should be noted that many of them are provoked by the car owners themselves.

Maslozhor. Occurs when using cheap types of oil. The consequences of this phenomenon are quite serious, resulting in significant material costs. Malfunctions caused by increased oil consumption - sticking of rings, increased wear of the ShPG. The only solution is to overhaul the engine.

Overheat. Causes could be a faulty thermostat, water pump, or stuck cooling fan. The issue is resolved by replacing them.

Floating speed. This malfunction is mainly caused by clogged carburetor jets or fuel filter. Maintaining the power system and using clean fuel eliminates this problem.

Extraneous noise when the engine is running. Here the culprits in most cases are unadjusted valves. Depending on the mileage and “age” of the engine, knocking noises can be caused by worn camshaft cams or piston pins. In any case, to identify the cause of unauthorized noise, the engine requires careful diagnostics.

Vibration when the motor is running. It can occur due to wear or destruction of engine mounts, incorrectly set ignition, carbon deposits in the combustion chambers and for a number of other reasons. In this case, it is also impossible to do without diagnostics.

Timely detection and elimination of identified faults allows you to significantly reduce or completely eliminate their negative impact on the engine.

In what models was the VAZ used?

Improved engine characteristics made it possible to equip VAZ cars of the following models with it:

  • 2103 Zhiguli sedan;
  • 21054 Zhiguli sedan (only for the FSB, the Ministry of Internal Affairs and the State Traffic Safety Inspectorate);
  • 2106 Lada sedan;
  • 21074 Lada sedan;
  • 2121 Niva carrying a 5-door station wagon or 3-door hatchback.


VAZ 21054 for special services

Due to the following difficulties in manufacturing some parts, management considered the 2106 motor to be economically unprofitable and it was discontinued.

Where is the engine number located?

An important identifying characteristic of any motor is its number. On a VAZ 2106, the number is stamped in two places at once (for the convenience of the driver and supervisory authorities):

  1. On the left side of the cylinder block.
  2. On a metal plate under the hood.


Each number is stamped as clearly as possible, since an ambiguous interpretation of the number cannot be allowed

The engine number is assigned at the factory; corrections and interruptions of numbers in the number are not allowed.

Disadvantages and advantages

The 2106 engine has significant disadvantages:

  • excess heat is transferred to the well of the piston bottom and fins by steel control plates inside the bosses;
  • dynamic loads are reduced due to the displacement of the finger from the axis of symmetry to the right;
  • When assembled into an engine, the pistons are mounted with markings in one direction, which increases labor costs and the human factor.


Piston 2106

The internal combustion engine uses a cylinder head from model 2103, a starter 35.3708 and a G221 generator for an engine with a current of 42A. Oil consumption does not exceed 700 g/1000 km. The instruction manual states that it is recommended to add 200 ml less lubricant than the volume of the system as a whole. The markings for which oil to pour are given in the upper table.

Tuning


It is possible to tune the 2106 engine because it is a classic engine.

Thanks to this opportunity, you can grind channels, polish intake manifolds, select a carburetor, camshaft, split gears, modify the intake, bore cylinder blocks, select the best options for the piston system, crankshaft, and connecting rod.

It is best to entrust such work as tuning the VAZ 2106 engine to qualified specialists, because this is a serious modification of the engine.

Many motorists want to make their own car more powerful, so they resort to this procedure. To perform tuning of the VAZ 2106 engine, it is necessary to replace specific factory-produced parts with more improved ones. This may include a valve, connecting rod or pistons.

In the process of modifying the car, you can increase the volume in the VAZ 2106 engine. During boosting, it is necessary to take into account the compression and compression ratio of the engine.

Specialists must necessarily assess the current condition of the engine and measure compression. Only after a positive verdict can the volume in VAZ 2106 engines be increased.

DIY tuning in the garage

When a person decides to do tuning with his own hands, he needs:

  1. Be sure to first check the wiring, which is made of silicone. In almost all cases, it requires urgent replacement. Experts recommend never skimping on wiring and using only high-quality shielded wires.
  2. Before installation, you need to make sure that the battery and generator have sufficient energy and power.
  3. To increase engine power, you need to replace the factory generator and rebuild the ignition system.
  4. You can tune the VAZ 2106 engine at home, but before that you need to watch the lessons and read the relevant manuals. Not every person will be able to assemble the engine correctly and take into account all the details.

Maintenance Procedure

The classic design of the internal combustion engine allows you to get by with simple steps when servicing the engine:

Maintenance objectTime or mileage (whichever comes first)
Timing beltreplacement after 100,000 km
Battery1 year/20000
Valve clearance2 years/20000
Crankcase ventilation2 years/20000
Belts that drive attachments2 years/20000
Fuel line and tank cap2 years/40000
Engine oil1 year/10000
Oil filter1 year/10000
Air filter1 – 2 years/40000
Fuel filter4 years/40000
Heating/Cooling Fittings and Hoses2 years/40000
Coolant2 years/40000
Oxygen sensor100000
Spark plug1 – 2 years/20000
Exhaust manifold1 year

As the actual life of the internal combustion engine increases, consumables may be replaced more frequently than specified, or operations for cleaning the carburetor, engine, jets, and other attachments may be added.


Motor maintenance

Frequent malfunctions

In addition to the fact that when the timing chain breaks, the piston bends the valve, the classic engine circuit has characteristic malfunctions:

DefectCauseElimination
Knock1) the main bearings knock dully, the frequency coincides with the crankshaft speed
2) the sound of connecting rod bearings is sharper, present at XX

3) the sound of the pistons is dull, observed at low speeds

4) the valves knock less intensely, the shaft rotation is half as frequent

1) adjusting the ignition, checking the oil level, replacing bearings, tightening the flywheel bolts
2) replacing bearings, checking lubricant pressure

3) replacement of rings, pistons, cylinder boring

4) replacing springs, adjusting gaps

Low oil pressure on a warm engine1) wear of oil pump gears
2) increased clearances of liners and bearings
1) repair of the unit
2) replacement of bearing shells or housings
Increased lubricant consumption1) leaking seals
2) clogging of the ventilation system

3) wear of cylinders/rings

1) replacement of consumables
2) cleaning channels

3) installation of repair kit

Increased gas mileage1) the damper opening angle is off
2) high resistance to movement

3) ignition timing is off

4) breakdown of the vacuum distributor

1) damper adjustment
2) tire inflation

3) ignition adjustment

4) replacing the regulator

Reduced throttle response and power1) pump failure
2) ignition fault

3) the fuel filter is clogged

4) the damper is not fully open

1) pump repair
2) ignition check

3) filter replacement

4) damper adjustment

Engine overhaul includes boring cylinders, replacing shafts, piston and crank groups in any combination.

Constructive decisions

  • major repairs were required more often due to burnout of valves;
  • Unstable operating modes on low-quality domestic fuel.


Valves burnout

The engine was equipped with pistons from a VAZ 21011, there was no need to reconfigure the equipment, and the cost price was not affected.

Injection modification

The first in the line of internal combustion engines of the AvtoVAZ manufacturer, the 2106 engine received tuning in the form of distributed injection. At the same time, the owners received a headache:

  • intense heating, since the mixture is lean, the manufacturer’s cooling system cannot cope with temperature loads;
  • increased fuel consumption up to 13 l/100 km in winter.


Injection 2106

A positive feature is the low budget for major repairs within 10,000 rubles.

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