Timing Chains, Installing (M62 Engine To 9/98) - BMW 5251 Service Manual

I
Camshaft Timina Chain
/
Cylinders
5-8
Timing chains, installing
(M62 engine to 911 998)
4
The procedure outlined below assumes that the camshafts
are locked in the TDC installation position with special lock-
ing tools as shown earlier.
4
lnspect timing chain sprocltets and chain. Inspect guide rail
and tensioner rail (arrows) for grooves caused by chain con-
tact. Replace any part that is worn or damaged.
NOTE-
If any sprocl(ets are being replaced due to wear, the chain
should also be replaced. If the crankshaft sprocket requires
replacement, the oil pump drive sprocket and chain must be
removed. See 119 Lubrication System for oilpump removal
information.
-
If removed, reinstall timing chain tensioning rail, reversing
rail, and guide rail.
If tensioning rail was removed, replace O-ring at tensioning
rail oil guide.
Tightening torque
Reversing rail
to
engine
block
14
Nrn
(10
n-lb)
4
lnstall timing chain and intalte sprocket to intake camshaft on
left cylinder head. Center bores of camshaft flange in sprock-
et mounting slots. Install two mounting bolts finger tight.