Dismantling and assembly of pistons and rods. Audi A4 (from 2001 to 2005 release)
Service of Audi A4 from 2001 to 2005 release.
1. Operation and maintenance of the car
2. Engine
2.1. General information
2.2. Predvaritlny checks
2.3. Mekhanichsky part (petrol engines 2,0l)
2.3.1. Removal of the engine
2.3.2. Removal and installation of a poliklinovy belt
2.3.3. Removal and installation of a belt pulley of the crankshaft
2.3.4. Removal and installation of a gear belt
2.3.5. Removal and installation of a sealing flange and flywheel / the conducted disk
2.3.6. Replacement of manzhetny consolidation of the crankshaft on the party of a belt pulley
2.3.7. Removal and installation of a forward sealing flange
2.3.8. Removal and installation of a two-mass flywheel
2.3.9. Removal and installation of the conducted disk
2.3.10. Removal and installation of a bent shaft
2.3.11. Removal and a press fitting of the needle bearing in the crankshaft
2.3.12. Removal and installation of an asterisk
2.3.13. Dismantling and assembly of pistons and rods
2.3.14. Head of the block of cylinders
2.3.15. Removal and installation of the valve of 1 system of change of phases of gas distribution
2.3.16. Removal and installation of a cover of a head of the block of cylinders
2.3.17. Removal of a head of the block of cylinders
2.3.18. Installation of a head of the block of cylinders
2.3.19. Check of a compression
2.3.20. Repair of the valvate mechanism
2.3.21. Removal and installation of the phase shifter
2.3.22. Removal and installation of cam-shafts
2.3.23. Replacement of oil scraper caps (at the established head of the block of cylinders)
2.3.24. Check of the directing plugs of valves
2.3.25. Replacement of manzhetny consolidation of a final cam-shaft
2.4. Lubrication system
2.5. Cooling system
2.6. System of injection
2.7. System of production of the fulfilled gases
2.8. Mechanical part (petrol engines 3,0; 3,2 l)
2.9. Mechanical part (petrol engines of 4,2 l)
2.10. Mechanical part (diesel engines of 2,0 l)
2.11. Tables
3. Transmission
4. Running gear
5. Steering mechanism
6. Brake system
7. Onboard electric equipment
8. Body
9. Schemes of electric equipment
 







2-3-13-razborka-i-sborka-porshnejj-i-shatunov.html

2.3.13. Dismantling and assembly of pistons and rods

Sizes of pistons and cylinders
The sizes do not include a graphite covering (thickness of 0,02 mm).
The graphite covering is used up over time.


Check of a thermal gap of piston rings
Drive a ring from above, at right angle to a cylinder wall, to the lower opening of the cylinder, at distance about 15 mm from its edge. For this purpose use the piston without rings.


Check of a gap of piston rings on height

Fig. 2.134. Check of a gap of a piston ring on height



Before check clear a ring flute of the piston.


Check of pistons
Measure approximately in 10 mm from bottom edge, at right angle to an axis of a piston finger.
As much as possible tolerance from the nominal size of 0,04 mm

Check of diameter of the cylinder
Carry out measurements a cross on a cross in three places in the cross direction A and the longitudinal direction B (fig. 2.135).

Fig. 2.135. Scheme of check of diameter of the cylinder


As much as possible tolerance from the nominal size: 0,08 mm.

Adjusting provision of an insert of the bearing

Fig. 2.136. Adjusting provision of an insert of the bearing


Bearing 1 insert with an oil opening for a rod (fig. 2.136).
Bearing 2 insert without oil opening for a cover of a rod (fig. 2.136).
Enclose inserts of bearings in a rod and a cover of a rod in the middle.
The size A have to be identical at the left and on the right.


2.3.12. Removal and installation of an asterisk

2.3.14. Head of the block of cylinders