Compression pressures, checking
Special tools, testers and auxiliary items required
- Puller T10095 A
- Torque wrench V.A.G 1331
- Compression tester V.A.G 1763
- Spark plug removal tool 3122 B
- Assembly tool T10118
Test conditions
- Engine oil temperature at least 30 ° C
- Battery voltage must be at least 11.5 V.
Test sequence
- Remove engine cover.
For engine codes BJS
- Place assembly tool T10118 on release button - arrow -, release connector retainers, and carefully pull off connectors from ignition coils 1 to 6.
- From straight side of connector, push puller for ignition coil T10095 A on in direction of - arrow -, and pull out the ignition coil with power output stage.
- Remove fuse No. 29 from fuse holder.
Removing fuse No. 29 interrupts the voltage supply to the injectors.
- The spark plugs are removed from all engines using spark plug removal tool 3122 B.
- Check compression pressure using compression tester V.A.G 1763.
NOTE:
- Using tester, refer to Operating instructions.
- Operate starter until tester shows no further pressure increase.
Compression pressure:
New: 10 to 13 bar pressure
Wear limit: 7.5 bar pressure
Permissible difference between all cylinders: 3 bar
- Thereafter, reinstall spark plugs and ignition coils with power output stages, refer to Ignition coils with power output stage, removing and installing