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

WARNING: This page is about a different variant/trim than selected.

IMPORTANT: High tension - mortal danger!
Interrupt power supply to ignition coils.
Read and comply with notes on compression pressure check.

Necessary preliminary tasks:

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

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

Fig 1: Identifying Tip And 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: Identifying Special Tools (11 0 222, 11 8 731 And 11 8 732)

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Screw special tool 11 0 222 onto special tool 11 8 731 to 10 Nm.

Fig 3: Identifying 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

Fig 4: Identifying Adapter Lead
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Assemble engine

Now clear the fault memory.