BMW 5251 Service Manual page 168

11 3-74
Cylinder Head Removal and Installation
4
Work at left side cylinder head loosen three accessible cam-
shaft sprocket fasteners (arrows) on both intake and exhaust
camshafts approximately
' I 2
turn.
Toprevent valve topiston contact, counterholdcamshaft with
27 mm open-end wrench whenever loosening or tightening
camshaft sprocket fasteners. If necessarq! grind outer side of
wrench jaws to prevent damaging cylinder head.
4
Rotate crankshaft one complete rotation to TDC overlap.
Right (passenger's side of engine) side camshaft lobes for
number one cylinder should be in overlap position as shown
(arrows).
4
Working at left cylinder head, loosen remaining sprocket fas-
teners (arrows) on both intake and exhaust camshafts ap-
proximately
' I 2
turn.