Car engine repair VAZ-2108

Features of the engine design
The car is equipped with a 4-stroke carburetor 4-cylinder engine (figure 2) with in-line vertical cylinder arrangement and with a camshaft located on the cylinder head. The...

Engine mount — design description
The engine, together with the clutch, gearbox and final drive, forms a power unit, which is mounted on the vehicle on three elastic supports 2, 3 and 5 (figure 3). The front 5 and...

Crank mechanism — description of the design
It consists of a cylinder block, a piston with a connecting rod and a crankshaft with a flywheel. Cylinder block Cast iron, cast. Block cylinders are divided into 5 classes by...

Valve timing mechanism — design description
The valve timing mechanism consists of a camshaft 5 (figure 5), valves 2 and guide bushings, springs with fastening parts and valve tappets 3. The mechanism parts are located on...

Possible engine malfunctions
Possible engine malfunctions, their causes and solutions * Before troubleshooting, make sure that the coolant temperature gauge and its sensor are in good working order (see...

Removal and installation of the power unit
The power unit, which consists of the engine, clutch, gearbox and main gear, is removed from the engine compartment downwards. In this case, the ends of the front wheel drive...

Cylinder head — removal and installation
The head is removed from a car if it is not necessary to remove the power unit to fix the malfunction or if it is necessary to remove carbon deposits from the surface of the...

Camshaft — Removal and Installation
Remove the camshaft in the following order. Remove the air filter as described earlier in the section " Cylinder head ", and close the carburetor with a technological plug from...

Camshaft Drive Belt — Removal and Installation
Before starting to replace the belt, brake the car with the parking brake and engage the fourth gear. Remove the toothed belt protective cover. Loosen the alternator drive belt...

Camshaft Oil Seal — Removal and Installation
Before replacing the seal, brake the car with the parking brake and set the gearshift lever to neutral. Remove the front toothed belt cover. Turn the crankshaft clockwise until...

Front Crankshaft Oil Seal — Removal and Installation
Before starting to replace the seal, place the car on a lift, brake with the parking brake, put stops under the rear wheels and hang up the front ones. Disconnect the wire from...

Rear Crankshaft Oil Seal — Removal and Installation
Before starting to replace the seal, place the car on a lift and remove the gearbox (see section. " Transmission "). Loosen the bolts securing the clutch housing to the flywheel...

Connecting rod and piston group — removal and installation
To remove parts of this group, place the car on a lift and disconnect the wire from the negative terminal of the battery. Raise the car, remove the engine splash guard and drain...

Disassembly and assembly of the power unit
Disassembly Remove the exhaust pipe with the bracket. Unscrew the starter mounting nuts 3 ( figure 21 ) to the clutch housing and remove the starter. Remove brackets 1, 4 and 6 (...

Disassembly and assembly of the engine
Disassembly The washed and cleaned engine is placed on a disassembly stand and the oil is drained from the crankcase. Remove hose 1 (figure 22) and hose 2 of the engine crankcase...

Connecting rod and piston group — disassembly and assembly
Disassembly Remove the piston rings. Place the piston in a support with a cylindrical recess and, using the A.60308* mandrel, centered in the piston pin hole, press out the pin...

Cylinder head — disassembly and assembly
Disassembly If only one part needs to be replaced, then you don't have to disassemble the cylinder head completely and remove only what is needed for replacement. The cylinder...

Cylinder Block — Checking and Repairing
Examination The cylinder block is thoroughly washed and the oil channels are cleaned. After blowing and drying with compressed air, the cylinder block is inspected. Cracks in any...

Connecting rod and piston group — inspection and repair
Clean the piston from carbon deposits and remove all deposits from the piston and connecting rod lubrication channels. Carefully inspect the parts. Cracks of any kind on the...

Crankshaft and flywheel — inspection and repair
Crankshaft Inspect the crankshaft. Cracks in any place of the crankshaft are not allowed. Scratches, nicks and marks are not allowed on the surfaces mating with the working edges...

Cylinder head and its parts — inspection and repair
Cylinder head The cylinder head is thoroughly washed and the oil channels are cleaned. Carbon deposits are removed from the combustion chambers and from the surface of the exhaust...

Camshaft and its drive — inspection and repair
Camshaft The bearing journals of the camshaft are not allowed to have any scoring, nicks, scratches or dragging of aluminum from the bearings. The working surfaces of the cams and...

Adjusting clearances in the valve drive mechanism
Gap A ( see figure 5 ) between the camshaft cams and the adjusting washers on a cold engine should be (0.20±0.05) mm for the intake valves and (0.35±0.05) mm for the exhaust...

Adjusting the tension of the camshaft drive belt
To tension the belt, remove the front toothed belt cover and turn the crankshaft by the generator drive pulley mounting bolt clockwise two turns. The crankshaft should only be...

Adjusting the alternator drive belt tension
Normal deflection A (figure 51) the belt should be within 8-10 mm at a force of 10 kgf. To adjust the belt tension 4, loosen nut 1 securing generator 3 to tension bar 2. Move the...

Setting the ignition timing
The ignition advance angle to TDC at a crankshaft rotation speed of 750–800 rpm should be (1±1)°. To check the ignition timing on the car there is a scale 1 (figure 52) in the...

Engine running-in after repair
The repaired engine is subjected to bench tests (running-in) without load according to the following cycle: at a rotation speed of 750-800 rpm - 2 min; 1000 — 3; 1500 — 4; 2000...

This section is available on russian, bulgarian, belarusian, ukrainian, serbian, croatian, romanian, polish, slovak, hungarian

More articles from other manuals on VAZ cars:
➠ Power unit: Engine repair VAZ-2107 (1982-2012)
➠ Power unit: Engine repair VAZ-2101 (1970-1983)
➠ Electrical equipment: Engine electrics VAZ-11113 (1996-2003)
➠ Power unit: Engine repair VAZ-21213 (1994-2006)
➠ Power unit: Engine repair VAZ-2110 (1995-2007)

Share with friends: