11 12 101 Replacing cylinder head gasket (N55)
Special tools required:
IMPORTANT:
Aluminum screws/bolts must be replaced each time they are released
.
Aluminum screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Aluminum screws/bolts are not magnetic .
Jointing torque and angle of rotation must be observed without fail (risk of damage) .
Aluminum screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Aluminum screws/bolts are not magnetic .
Jointing torque and angle of rotation must be observed without fail (risk of damage) .
Necessary preliminary tasks:
- Remove CYLINDER HEAD .
- Check cylinder head for DEVIATION FROM FLATNESS .
- Check cylinder head for WATERTIGHTNESS .
Remove the cylinder head gasket.
Insert special tool 11 4 430 into feed pipe of oil pump.
Remove remnants of oil and dirt from blind holes (1).
IMPORTANT:
Work on sealing surface on engine block and on cylinder head with special tool 11 4 470
only.
Do not use any metal-cutting tools.
Do not use any metal-cutting tools.
Check adapter sleeves (1) for damage and firm seating.
The cylinder head gasket on the N55 is a beaded metal gasket.
Place cylinder head gasket (2) in direction of arrow on engine block.
Fix new cylinder head gasket with fitting sleeves (1).
Assemble engine.