BMW 5251 Service Manual page 212

1 16-36
I
Cylinder Head and Valvetrain
4
Preload exhaust camshaft spring plate by pressing on im-
pulse wheel while tightening mounting nuts (arrows) fingel
tight.
4
Install BMW special tool 11 6 150 (VANOS setup bracket) to
front of cylinder head timing case. Install nuts (arrows) finger
tight, then tighten down uniformly until special tool is in full
contact with cylinder head.
CAUTION--
Male sure aNgas1ef material Is removed from face of cyiin-
der head. Clean sealing face and keep free of oil.
4
Secure camshaft sprockets and impulse wheels:
Tighten mounting screws (A) on exhaust camshaft impulse
wheel to approx. 5 Nm (44 in-lb).
Tighten mounting nuts (B) on exhaust and intake sprocket
assemblies to approx. 5 Nm (44 in-lb).
Torque down mounting screws (A) and nuts (B) to final
specifications.
Tightening torques
Sprocket assembly to camshaft initial torque
5
Nm (44 in-lb)
Sprocket assembly wheel to carnshaft
M7
tom screws
(A)
20
Nm (15 ft-lb)
M6
mounting sciew (6)
I 0 Nm
(8
ft-lb)
-
-
-
-
-
Remove crankshaft locking tool from crankcase.
-
Remove camshaft locking tools from cylinder head.