11 00 039 Checking compression of all cylinders (S65)
WARNING: This page is about a different car, the 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.
Special tools required:
- 11 0 224
- 11 0 235
See ENGINE - SPECIAL TOOLS .
IMPORTANT:
High tension - mortal danger!
Disconnect all supply leads from ignition coils (interrupt power supply to ignition coils).
Disconnect all supply leads from ignition coils (interrupt power supply to ignition coils).
IMPORTANT:
Check Schrader valve on special tool 11 0 235 for correct seating (engine damage).
The throttle valves cannot be opened by opening the throttle.
The compression check is carried out exclusively by means of the idle actuators.
A compression check is only possible with the diagnosis tester.
The catalytic converter will incur damage if the fuel injectors are not switched off.
The throttle valves cannot be opened by opening the throttle.
The compression check is carried out exclusively by means of the idle actuators.
A compression check is only possible with the diagnosis tester.
The catalytic converter will incur damage if the fuel injectors are not switched off.
Necessary preliminary tasks:
- Remove microfilter housing. See MICROFILTER .
- Remove all spark plugs. See 12 12 011 REPLACING ALL SPARK PLUGS (S65) .
- Connect diagnosis tester.
- Service function.
- Drive.
- Engine electronics
- Switch off fuel injection.IMPORTANT: Fuel injectors are switched off.
- Actuate starter motor for 8 seconds.
Screw special tool 11 0 235 into spark plug hole.
Check that sealing ring is in perfect condition on special tool 11 0 235.
Connection (1) for diagnosis tester or special tool 11 0 224.
NOTE:
Picture shows S85.
Connect special tool 11 0 224 or 25 bar pressure adapter to diagnosis tester.
Compression pressure.
Now clear the fault memory.