Engine Lubrication: Testing and Inspection
CHECKING ENGINE OIL PRESSURERemove air cleaner with air flow sensor.
Pull off plug on oil pressure switch.
Unscrew oil pressure switch (1).
Installation:
Check seal (2). replacing if necessary.
Screw in Special Tool 11 4 060.
Connect 10 bar (142 psi) pressure tester of BMW Service Tester.
Install air cleaner.
Measure oil pressure.
Oil pressure at idle = 0.5 bar (7.3 psi)
Oil pressure at top speed = 4.0 to 6.0 bar (58 to 87 psi)