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
- Powertrain
- Engine electronics
- Engine oil
- Oil-pressure control

Special tool 11 9 250 must be converted for N55







Necessary preliminary tasks:
- Connect BMW diagnosis system to vehicle.
- Observe diagnosis instructions.
- Protect drive belt against dirt contamination
- 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 slotted 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 bolt with a slotted 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.