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

11 7-66
I
Camshaft
Timing
Chain
4
install cylinder head cover:
Check for correct seating of half-moon seals (A) in back of
cylinder head cover.
Use a small amount of Three Bond 1209 8 or equivalent
sealant at corners (B) of half-moon cutouts. Seal corners
in front of cylinder head at VANOS control unit.
Tightening torque
Cylinder head cover to cylinder head
10 Nm
(89
in-lb)
-
Remainder of reassembly is reverse of removal, noting the
following:
Secure all coolant hoses, thermostat housing, engine cool-
ant drains.
Install new engine oil filter and oil. See 119 Lubrication
System.
Refill and bleed cooling system as described in 170 Radi-
ator and Cooling system.
Use scan tool to check VANOS operation with engine
idling.
Tightening torques
Coolant drain plug to cylinder block 25
Nm (18 ft-lb)
Radiator cooling fan (viscous clutch)
to coolant pump
40
Nm (30 ft-lb)
Radiator drain screw to radrator
2.5
Nm
(22
in-lb)
Vibration damper hub to crankshaft 41
0
Nm (300 ft-ib)
TIMING CHAIN
(M62
ENGINE TO
911998)
Timing chains, removing
(M62 engine to 911 998)
Camshaft timing chain removal requires that the engine oil
pan be removed.
Special BMW service tools are needed for timing chain re-
moval and installation procedures. The special tools assure
propertiming of thevaivetrain. Precise marks to set the timing
on the camshafts are not provided for reassembly. Read the
procedures through before beginning the job.
CAUTION-
Special
B M W
service tools are needed for this procedure.
Read the procedure through before beginning the job. I f the
camshafts are notproperly timed, the pistons can contact the
valves.