Compression pressures, checking
Special tools, testers and auxiliary items required
- Compression tester V.A.G 1763
- Spark plug removal tool 3122 B
- Ignition Coil Puller T40039
- Spring-type clip pliers VAS 5024 A
Test sequence
NOTE:
- Engine oil temperature min. 30 °C
- Battery voltage at least 12.7 V
- Remove engine cover - arrows -.
- Remove bolts - 1 -.
- Disconnect connector - 2 - from ignition coils and free up cable.
- Remove ignition coils with power output stages - 2 - using Ignition Coil Puller T40039.
- Remove spark plugs, using spark plug removal tool 3122 B.
- Disconnect 8-pin connector from fuel injectors. Refer to 8-pin harness connector for fuel injectors under Component locations beneath intake manifold
- Check compression using compression tester V.A.G 1763 and adapter V.A.G 1763/6.
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 |
|---|---|---|
| 11.0 to 14.0 | 7.0 | max. 3.0 |
- Install spark plugs and ignition coils.
- Read out ECM DTC memory Vehicle Diagnostic, Testing and Information System VAS 5051 in "Guided Fault Finding" function
NOTE:
- By separating the connections, DTCs are stored to memory. After the test, check fault memory and erase, if necessary.
Torque specifications
| Component | Nm |
|---|---|
| Spark plugs in cylinder head | 30 |