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) Tip

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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: Screwing Special Tool (11 0 222) Into 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.

Fig 4: Checking Compression

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Assemble engine

Clear diagnostic fault entries from fault memory.