BMW 5251 Service Manual page 161

1 13-67
Cylinder Head Removal and l n s t a K I
- -
<
Using a torque angle gauge, tighten cylinder head bolts to
specified torque angle in stages
2
and 3.
Tightening
torques
Stage
I
30 Nrn (22
ft-lb)
Stage
II
+80°
Stage
Ill
+80°
4
If possible, confirm oil return pipe at bottom of separator is
correctly seated (arrow).
NOTE-
Photo shows lower timing case cover removed.
<
Remove old O-ring and install new O-ring (arrow) in angle
section.
-
Press oil separator into angle section and install guide rail re-
taining screws.
4
Tighten allen screw (arrow) just until it makes contact with
crankcase vent tube angle section without play.
NOTE-
Allen screw secures crankcase vent tube in place. Do not
torque down.