11 00 039 Checking compression at all cylinders

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2008 MINI Cooper, 2007 MINI Cooper, 2006 MINI Cooper, 2005 MINI Cooper, and 2004 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

For Special Tool identification, see ENGINE - SPECIAL TOOLS - COOPER (1.6L) R50/W10 .

Special Tools Required:

11 0 224
11 8 490

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).

Fig 1: Detaching Plug Connector

Courtesy of BMW OF NORTH AMERICA, INC.

Unscrew all spark plugs. Refer to 12 12 011 REPLACING ALL SPARK PLUGS .

Screw special tool 11 8 490 into spark plug thread and connect special tool 11 0 224.

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

Fig 2: Identifying Special Tools

Courtesy of BMW OF NORTH AMERICA, INC.

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

Compression pressure.

Refer to ENGINE - TECHNICAL DATA - COOPER (1.6L) R50/W10 .

Fig 3: Measuring Compression Pressure

Courtesy of BMW OF NORTH AMERICA, INC.

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.