BMW 5251 Service Manual page 308

1 17-72
Camshaft Timing Chain
4
Working at right side cylinder head loosen Intake camshaft
sprocket bolts (arrows).
4
Secure left and right side camshafts in TDC position:
Use BMW special tool set 11 2 440.
-
If necessary, turn camshaft so that special tools are
squarely seated on cylinder head.
Working at left cylinder head loosen intake camshaft
sprocket bolts (arrows).
CAUTION-
Counter hold camshaft with a 27mm open-end wrench while
loosening sprocket bolts. Grind wrench if necessary to pre-
vent damage to head.
Remove BMW special tool 11 2 300 from crankshaft locking
tool bore.