11 00 039 Checking compression of all cylinders (N14)

IMPORTANT: High tension - mortal danger!
Interrupt power supply to ignition coils.

Necessary preliminary work:

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 Special Tool (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: Preparing Special Tools

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

Fig 3: Tightening Special Tool (11 0 222) Onto Special Tool (11 8 731)

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

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 operate starter motor until compression pressure stops rising.

NOMINAL VALUES, COMPRESSION PRESSURE

Fig 4: Checking Compression
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Assemble engine

Clear diagnostic fault entries from fault memory.