Check of basic elements with hydrocompensators. 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)
2.4. 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)
2.8.1. Number of the engine
2.8.2. Removal and installation of a poliklinovy belt
2.8.3. Removal and installation of a damper of tortional fluctuations
2.8.4. Removal and installation of a forward sealing flange of the crankshaft with a crankshaft epiploon
2.8.5. Removal and installation of a two-mass flywheel (cars from the manual transmission)
2.8.6. Removal and a press fitting of the needle bearing of a two-mass flywheel (cars from the manual transmission)
2.8.7. Removal and installation of the conducted disk (cars with the automatic transmission)
2.8.8. Replacement of an epiploon of the crankshaft from the chain drive
2.8.9. Removal and installation of the left and right covers of driving chains
2.8.10. Removal and installation of the lower cover of a driving chain
2.8.11. Camshaft drive
2.8.12. Removal of the chain drive from cam-shafts, removal and installation of a natyazhitel of a chain
2.8.13. Removal and installation of a chain of the drive of the oil pump and balancer shaft
2.8.14. Removal and installation of the balancer shaft
2.8.15. Removal and installation of a bent shaft
2.8.16. Conrod and piston group
2.8.17. Check of a radial gap of rods
2.8.18. Check of a compression
2.8.19. Removal and installation of cam-shafts
2.8.20. Replacement of oil scraper caps
2.8.21. Check of basic elements with hydrocompensators
2.8.22. Check of the directing plugs of valves
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
 







2-8-21-proverka-opornykh-ehlementov-s-gidrokompensatorami.html

2.8.21. Check of basic elements with hydrocompensators

NOTE
Basic elements with hydrocompensators are not subject to repair.

The irregular knock of valves at start of the engine is normal.

Operating procedure
Start the engine and wait until the fan of a radiator turns on at least once.
Raise turns for 2 min. up to 2500 min.-1, if necessary carry out a trial trip.

NOTE
If the irregular knock of valves vanishes, but at trips on short distances appears again, it is necessary to replace the oil reducing valve.
If noise of basic elements with hydrocompensators does not vanish, it is necessary to define faulty basic.

Uncover GBTs.
Turn the crankshaft that the cam of the checked basic element settled down above.

Cars with the mechanical transmission
With the included 4th transfer and the switched-off ignition to advance.

Cars with the multitronic check point
Turn a bent shaft for the central bolt of a pulley of a poliklinovy belt clockwise.
Define a gap between a cam and the roller lever.

Fig. 2.391. Definition of a gap between a cam and the roller lever


Press on the roller lever the screw-driver (fig. 2.391) down.
If between a cam-shaft and the roller lever the probe 0,20 mm thick enters:
Replace a basic element.

NOTE
After installation of cam-shafts the engine it have to is impossible to bring Gidrokompensatora within about 30 min. to be besieged (otherwise valves will be adjoin to pistons).

After works on the valvate mechanism scroll the engine by hand not less than two turns to be convinced that any valve does not adjoin to the piston.

Sizes of valves

NOTE
It is forbidden to process inlet and final valves. Only grinding in is allowed.


2.8.20. Replacement of oil scraper caps

2.8.22. Check of the directing plugs of valves