Compression Check: Testing and Inspection

11 00 039 - Checking compression at all cylinders





Special tools required:
- 11 0 224 11 0 220 Compression Test Kit
- 11 8 490 11 8 490 Test Probe





Note:
Read out fault memory of EMS/DME control unit, check stored fault messages, rectify faults and clear fault memory.

Switch off ignition.





Caution!
High tension - danger!

Interrupt voltage supply to ignition coils.





Detach plug connector from ignition coil unit.

Press securing clip (1) away.

Detach plug connector (2).





Unscrew all spark plugs Service and Repair.

Screw special tool 11 8 490 11 8 490 Test Probe into spark plug thread and connect special tool 11 0 224 11 0 220 Compression Test Kit.

Make sure seal of adapter tool is in proper working order.





Press accelerator pedal to floor and actuate starter motor until compression pressure stops rising.

Compression pressure.

Refer to Technical Data Engine in General W10 / COOPER / B16.





Note:
Disconnect ignition unit; this results in a defect trouble code being output during starting.

Connect DIS and delete stored faults.





Note:
Read out fault memory of EMS/DME control unit, check stored fault messages, rectify faults and clear fault memory.