VAZ 2101, 2102
1. Specifications
2. Operation and service
3. The engine
3.1. Features of the device
3.2. Possible malfunctions of the engine, their reason and elimination methods
3.3. Removal and engine installation
3.4. Engine dismantling
3.5. Engine assemblage
3.6. Bench tests of the engine
3.7. Engine check on the car
3.8. The block of cylinders
3.9. Pistons and rods
3.9.1. Features of the device
3.9.2. Выпрессовка a piston finger
3.9.3. Clearing
3.9.4. Piston selection to the cylinder
3.9.5. Backlash check between the piston and a finger
3.9.6. Check of backlashes between piston flutes and rings
3.9.7. Backlash check between loose leaves of a rod and cranked shaft
3.9.8. The control of weight of pistons
3.9.9. Assemblage of shatunno-piston group
3.9.10. Check запрессовки a finger
3.9.11. Parallelism of axes of the bottom head of a rod and a piston finger
3.10. A cranked shaft and a flywheel
3.11. A head of cylinders and клапанный the mechanism
3.12. A camshaft and its drive
3.13. Cooling system
3.14. Greasing system
4. Fuel system
5. Ignition system
6. Start and gymnastics system
7. Transmission
8. A running gear
9. A steering
10. Brake system
11. An electric equipment
12. A body
13. Features of repair
14. Appendices



3.9.5. Backlash check between the piston and a finger

The finger запрессован in the top head of a rod with a tightness and freely rotates in piston lugs.

The prevention

On external diameter fingers are broken into three categories through 0,004 mm. The category is underlined a colour label at a finger end face: a dark blue label – the first category, green – the second, red – the third.

1. Interface of a piston finger and the piston check, inserting a finger preliminary oiled for the engine, into an aperture of a lug of the piston. For correct interface it is necessary, that the piston finger entered into an aperture from simple pressing of a thumb of a hand.
2. Check up landing of a piston finger. It should not drop out of a lug if to hold the piston with a piston finger in vertical position.
3. A finger dropping out of a lug replace with another, the following category. If in the piston a finger of the third category the piston with a finger is replaced.

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3.9.4. Piston selection to the cylinder
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3.9.6. Check of backlashes between piston flutes and rings