Audi 100/A6

1990-1997 of release

Repair and car operation

Audi 100/A6
+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engines
- 3.2. Diesel engines
   - 3.2.1.2. Technical characteristics
      3.2.1.3. Sinkhronizatsionnye of a gazoraspredeleniye label
      3.2.1.4. Compression check
      3.2.1.5. Gas-distributing belt
      3.2.1.6. Natyazhitel of a gas-distributing belt, asterisk
      3.2.1.7. Additional driving belts
      3.2.1.8. Camshaft cover
      3.2.1.9. Camshaft epiploon
      3.2.1.10. Epiploon of an intermediate shaft
      3.2.1.11. Epiploons of a cranked shaft
      3.2.1.12. Head of cylinders
      3.2.1.13. Hydraulic pushers
      3.2.1.14. Flywheel
      3.2.1.15. Engine fastenings
      3.2.1.16. Oil pallet
      3.2.1.17. Oil pump and maslozaborny branch pipe
   + 3.2.2. 5-cylinder engines
+ 3.3. Removal and partition of engines
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. Exhaust system
+ 8. Systems of start, ignition
+ 9. Transmission
+ 10. Brake system
+ 11. Suspension brackets, steering
+ 12. Body
+ 13. Electric equipment
+ 14. Good advice

3.2.1.4. Compression check

GENERAL INFORMATION

If the engine works badly or with interruptions, inspect a compression. Regular carrying out this check will allow you to prevent emergence of malfunctions in advance.

For carrying out check the tester intended for diesel engines is required. Connect a tester to an adapter and twist an adapter in an opening of a candle of heating or in an injector opening.

The engine should be warmed up, the accumulator is charged, candles and injectors are unscrewed, wires of the locking valve and the fuel block are disconnected.

Pressure in all cylinders should be identical. The difference more than in 0,5 bar between any two cylinders means malfunction. In the serviceable engine pressure should accrue quickly. The small pressure of the first step which is gradually raising at the subsequent steps, specifies that piston rings are worn-out. Small pressure of the first step which does not accrue at the subsequent steps, indicates leak in valves or on the punched laying of a head. Deposits on the lower parts of valves can become the reason of a low compression also. Low pressure in two next cylinders practically always means that between them head laying is punched.

If at carrying out check you have difficulties, address to experts.