BMW 5251 Service Manual page 265

Camshaft Timing chain1
Using a drift, drive two locating dowels (arrows) in lower
timing cover toward rear of car.
4
Remove timing cover mounting bolts (arrows).
* Carefully slide cover with water pump forward to remove
CAUTION-
Use care when removing the cover from the cylinder head
gasket If the cover is stuck, use a sharp knife to separate
it from the head gasket.
If cylinder head gasket is damaged, remove cylinder
head and replace head gaslet. See 113 Cylinder
head and valvetrain.
-
Remove timing cover locating dowels by driving them
forward.
-
Lift primary chain sprocket off crankshaft sprocket and
remove chain.