BMW 5251 Service Manual page 243

Camshaff Timing Chain
NOTE-
Mark direction of belt rotation if reusing belt.
-
Remove vibration damper mounting bolts and remove vibra-
tion damper and pulley from hub.
NOTE-
The M52 6-cylinder engine uses a 2-piece vibration damper
and hub assembly.
4
Install crankshaft holder (BMW special tools 11 2 150
and11 2410).
NOTE
-
Be careful while aligning locator pin hole in special tool 11 2
410 with vibration damper locatorpin.
-
While counterholding crankshaft, loosen and remove crank-
shaft center bolt.
CAUTION-
Do not use flywheel locking tool to hold crankshaft stationary
to loosen or tighten crankshaft hub center bolt Use only the
special tools specified, or equivalent hub holding tool.
NOTE-
The cranlshaft hub center bolt is torqued to 4 10 Nm
(300 ft-16).
-
Remove damper hub and special tools.
4
Install cap (BMW special tool 11 2 383) on end of cranltshaft.
4
Install seal guide (BMW special tool 11 2 385) over end of
crankshaft. Be sure to align tool with keyway on crankshaft
(arrow).