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15
Engine/Cylinder Head and Valve Drive 944
Installing and tightening the cylinder head
Model 87 onward
Engine type M 44.40
Note
The cylinder head may be mounted with the
engine installed.
1.
Place the cylinder head gasket in the cer-
rect position.
2. Mount cylinder head
Tightening sequence:
87/420
Opposite to undoing sequence.
Tightening specifications for cylinder
head
Model 87 onward
Engine type M 44.40
1st stage
2nd stage
3rd stage
20 Nm
90° torque angle
90° torque angle
Model 89 onward
Engine type M 44.41 (3.0 I)
Note
The cylinder head has been reinforced by
20
mm in the area of the bearing surfaces for
the
cylinder head nuts. This has altered the
tightening sequence.
Tightening specifications
Model 89 onward
Engine type M 44.41 (3.0 l)
1st stage
2nd stage
3rd stage
20 Nm
60° torque angle
90° torque angle
Note
Never use lubricant when fitting cylinder
head
nuts and washers. Apply a light film of
engine
oil to the stud thread only.
15 - 110
Installing and tightening the cylinder head
Printed in Germany - XXV, 1992