Timing Chains, Installing (M52 Tu And M54 Engines) - BMW 5251 Service Manual

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Camshaft Timing Chain1
Timing chains, installing
(M52
TU
and M54 engines)
CAUTIOI\C
The procedure outlined below assumes that the camshaits
are lockedin the TDC installation position with speciallocling
tools as shown earliel:
-
inspect timing chain sprockets. Inspect guide rail and ten-
sioner rail for damage. Replace any part that is worn
or
dam-
aged.
NOTE-
If any sprockets are being replaced due to wear, the chain
should also be replaced.
4
Primary timing chain assembly
1. Primary chain tensioner
2. Chain tensioner rail
3.
Cranltshaft sprocket
4. Exhaust camshaft sprocket
5. Primary chain
6. Anchor bolt
7. Guide rail
8. Anchor bolt
9. Woodruff key
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Install primary timing chain to crankshaft sprocltet and hang
upper end from exhaust camshaft.
-
If necessary, replace crankshaft radial seal in cover. See
Crankshaft oil seal, replacing (M52 TU and M54 engines).