Compression pressures, checking
WARNING: This page is about a different variant/trim than selected.
Special tools, testers and auxiliary items required
- Spark plug removal tool 3122 B
- Torque wrench V.A.G 1331
- Compression tester V.A.G 1763
- Remove fuse 32
NOTE:
- Removing fuse No. 32 interrupts the voltage supply to the injectors.
Test conditions:
- Engine oil temperature must be at least 30 ° C.
Work procedure
- Remove engine cover.
- Disconnect ignition coil connectors.
- Remove ignition coils.
- Remove spark plugs using spark plug removal tool 3122 B.
- Using a 2nd technician, have the accelerator pedal completely depressed.
- Check compression pressure using compression tester V.A.G 1763.
NOTE:
- Using tester Operating instructions.
- Operate starter until tester shows no further pressure increase.
Compression pressure:
| New bar positive pressure | Wear limit bar positive pressure | Difference between cylinders bar positive pressure |
| 10.0 to 14.0 | 7.0 | max. 3.0 |
- Screw in spark plugs using spark plug removal tool 3122 B and tighten to 30 Nm.
Vehicles with engine code AWD
- Install ignition coils and tighten to 10 Nm.
Vehicles with engine code AWP, AWW
- Install ignition coils. Ensure ignition coils are seated securely.
Continuation for all vehicles
- Check DTC memory
- Read readiness code
- If DTC memory was cleared or engine control module disconnected from voltage supply, readiness code must be regenerated.