BMW 5251 Service Manual page 219

Cylinder Head and valvetrain1
4
Remove camshaft position sensor (A) from timing chain cov-
er. Remove bolts (arrows) from timing chain covers and re-
move covers from right and left cylinder heads.
4
Counterhold intalte carnshaft on right cylinder head
4
Counterhold right intalte camshaft and remove sprocltet
mounting bolts (arrows) from right cylinder head.
Remove carnshaft impulse wheel and primary chain
sprocket.
-
Slide primary timing chain off sprocltet and suspend chain
with stiff wire to prevent it from dropping into lower timing
chain cover.