11 00 039 Checking compression in all cylinders (N43/N53/N54): Notes

WARNING: This page is about a different car, the 2016 BMW Z4, 2015 BMW Z4, and 2014 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

Read out fault memory of DME control unit
Check stored faults
Rectify faults
Delete 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: Identifying Special Tool (11 0 222) Tip

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

Fig 2: Preparing Special Tools

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

Fig 3: Screwing Special Tool (11 0 222) Into (11 8 731)

IMPORTANT: Oil thread on 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 (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: Installing Special Tool (11 0 222) Into Spark Plug Thread And Special Tool (11 0 224)

Assemble engine

Delete fault memory.