BMW 5251 Service Manual page 147

Cylinder Head Removal and Installation
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Clean contact edges of cylinder head face and VANOS unit
and apply a thin coat of permanently elastic Three Bond
1209 8 or equivalent to suriaces.
CAUTION-
Check locating dowel (A) and dowel sleeve (B) at top of
cylinder head for damage or incorrect installation.
Make sure all gasket material is removed from face of
cylinder head. Clean sealing face and keep free of oil.
I f any foreign material is present on the sealing surface,
the camshaft timing will be incorrect.
-
Install new steel gasket to front of cylinder head and install
VANOS unit.
NOTE
-
If VANOS control unit is being replaced, be sure to check and
adjust camshaft timing as described in 11 7 Camshaft Tim-
ing Chain.
-
Reinstall engine lifting eye.
Tightening torque
VANOS
unit to cylinder head
M6
nut
M7
nut
l o Nm (89
in-lb)
14 Nrn (10
it-lb)
-
Reconnect electrical harness connectors to camshaft posi-
tion sensors and VANOS solenoid valves.
4
Insert and tighten down VANOS hydraulic piston set screws
in splined shafts on intake and exhaust camshafts.
CAUJION-
Set screws have left hand tliread. Tighten counterclockwise.
Tightening torque
Hydraulic piston
to
splined shaft 10 Nm (89 in-lb)
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Replace sealing caps inside VANOS unit with short needle
nose pliers.