Engine Oil Pressure: Testing and Inspection

11 40 000 Checking engine oil pressure (N55)

Special tools required:





Important!
The regulated oil pump can only be checked and measured with the diagnosis system.
Vehicles with a regulated oil pump have a hydraulic valve fitted.
Diagnosis path:
- DME Digital Motor Electronics
- Complete vehicle
- Power train
- Engine electronics
- Engine oil
- Oil-pressure control

Special tool 11 9 250 must be converted for N55





Necessary preliminary work:
^ Connect BMW diagnosis system to vehicle.
^ Observe diagnosis instructions.
^ Protect drive belt against dirt
^ Have a cleaning cloth ready to catch escaping oil





Secure special tool 11 9 250 at hexagon head in a vice.

Release insert (2) using a screwdriver (1) in direction of arrow.





Release screw piece (1) on special tool 11 6 410.





Install special tool 11 6 410 in special tool 11 9 250.

Insert central screw with a screwdriver (1) hand-tight.





Insert screw piece (1) hand-tight in direction of arrow on special tool 11 6 410.





Release oil filter cover with special tool 11 9 240.

Tightening torque: 11 42 1 AZ.





Carefully detach filter element.

Installation Note:

Check all O-rings for damage, replace if necessary.





Install filter element (1) in special tool 11 9 250.

Installation Note:
Coat O-ring with engine oil.





Important!
Engine oil pressure measurement is only possible with the diagnosis system.

Screw in special tool 11 9 250 with a filter element.

Secure special tool 13 6 051 with a sealing ring to special tool.

Start engine and check engine oil pressure.

Nominal values.





Assemble engine.