11 00 039 Checking compression of all cylinders (N12, N14)

WARNING: This page is about a different car, the 2008 MINI Cooper and 2007 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.

Read out fault memory of DME control unit
Check stored faults
Rectify faults
Clear fault memory

IMPORTANT: High tension - mortal danger!

Interrupt power supply to ignition coils.

Read and comply with notes on compression pressure check.

Necessary preliminary tasks:

Remove Spark Plugs .

Unscrew tip (1) from special tool 11 0 222.

IMPORTANT: Then check the Schrader valve that is now visible for secure seating.

Fig 1: Tip, Special Tools (11 0 222) And (11 8 731)

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Prepare special tool 11 0 222 in conjunction with 11 8 732 and 11 8 731.

Fig 2: Special Tools (11 0 222), (11 8 732) And (11 8 731)

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Screw special tool 11 8 730 onto special tool 11 0 222 to 10 Nm.

Fig 3: Special Tools (11 0 222) And (11 8 731)

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IMPORTANT: Do not forget to oil spark plug thread of special tool 11 8 731.

Screw special tool 11 0 222 by hand into spark plug thread and connect special tool 11 0 224.

Use adapter lead (1) if the compression pressure is being checked with the BMW diagnosis system.

Depress accelerator pedal and actuate starter until compression pressure stops rising.

Nominal values, compression pressure

Assemble engine

Now clear the fault memory.

Fig 4: Adapter Lead, Special Tools (11 0 222) And (11 0 224)

Courtesy of BMW OF NORTH AMERICA, INC.