BMW 5251 Service Manual page 103

11
3-9
Cylinder Head Removal and Installation
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Remove left and right interior ventilation ducts (left shown):
Release ventilation filter cover latch (A) and remove cover.
Release plastic locking tab (6) or release locking tabs on
top of duct (later models).
Rotate duct counterclockwise to unlock from bulkhead and
remove (arrow).
Disconnect electrical connector from hood switch
(C).
Release spring lock (D).
Slide filter housing away from inner fender to remove.
Removal of right side ventilation duct is similar.
Remove rear bulkhead panel:
Remove rubber sealing gasket (arrow).
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Remove
3
mounting clips (A).
Remove 4 retaining screws (6).
Lift out panel.
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Remove complete air filter housing:
Loosen intake duct hose clamp (A) at throttle assembly.
Loosen clamp and remove idle control hose from ~ntake
duct (6) and
disconnect Idle speed control valve electr~cal
harness connector.
Disconnect electr~cal harness connector (C) from mass alr
flow sensor.
Remove air filter housing mounting screw (D).
Disconnect vent tube (E).
Loosen air intake duct clamp (F).
Carefully lift air filter housing out of engine bay.
4
Remove positive battery cable and intake manifold cover:
Remove protective cover from positive (+)jumper post (A).
Loosen and remove battery lead mounting nut.
Remove battery lead and push down through intake mani-
fold.
Remove trim caps (arrows) from fuel injector cover.
Remove cover hold down fasteners and lift off cover.