BMW 1989-1995 525i Service Manual page 94

113-22
CYLINDER HEAD REMOVAL AND INSTALLATION
0011506
Fig. 48. Intake sprocket correctly altgned to camsbatt with arrow
pointing up.
9. Adjust camshaft timing. tighten sprocket mounting
bolts . and install timing chain tensioner. as described in
117 Camshaft Tim ing Chain.
10. The remainder of installation is the reverse of removal.
noting the following special instructions:
• When installing front timing chain cover. use new gas-
kets. Remove protect ive film from gaskets. Seal lower
corners of chain cover to cylinder head before install-
ing cover. Tighten bolts in two stages . tightening cov-
er-to-cylinder block bolts first.
• Use new gaskets when mounting the intake manifold.
Tighten nuts finger tight first. then torque to specifica-
tion in stages working diagonally from inside to outside.
• Refill and bleed cooling system as described in 170
Radiator and Cooling System.
• Change engine oil and filter as described in 020 Main-
tenance Program.
CAUTlON -
To prevent damaging engine
etecuooic
systems.
be sure to install all ground wires removed earlier.
REMOVING AND INSTALLING CYLINDER HEAD
Tightening Torque-M60 engine
• Coolant drain plug to cylinder block .. 28 Nm (20 ft-Ib)
• Camshaft timing chain sprocket
to camshaft 15 Nm (11 ft-Ib)
• Camshaft timing chain tensioner
to cylinder head 40 Nm (30 ft·lb)
• Cams haft timing chain cover to cylinder
head/cylinder block 10 Nm (89 in-Ib)
• Cylinder head cover to cylinder head/timing chain cover
M6 10 Nm (89 in-Io)
M7 15 Nm (11 ft-Ib)
• Cylinder head to cylinder block
stage 1 30 Nm (22 tt-lb)
stage 2 +80 0
stage 3 +80'
• Exhaust manifold to cylinder head 22 Nm (17 ft-Ib)
• Intake manifold to cylinder heads 15 Nm (11 ft-lb)
• Radiator cooling fan
to coolant pump 40 Nm (30 fH b)
• Spark plugs to cylinder head 23±3 Nm (17±2 tt-lb)
To remove cylinder head
(M60 engine, right cylinder head)
This procedure covers removal of the right (passenger's
side) cylinder head only.
NOTE -
Speciat service tools are required to adjust camshaft tim-
ing
as
part of cylinder head installation. Be sure to review
the adjustment procedure outlined in 117 Camshaft
TIming Chain before removing the cylinder head.
1. Working beneat h rear seat. disconnect negative
H
ter-
minal of battery.
CAUTfON -
Disconnecting the battery cables may erase fault
codes stored in control unit memory.
2. With engine cold. drain engine coolant from radiator
and right cylinder block. Remove radiator fan and fan
shroud. See 170 Radiator and Cooling System.
WARNING -
Allow the cooling system to cool before opening or
draining the system. Hot coolant can scald and
burn .
NOTE -
• The radiator cooling fan nut (32
mm
wrench) has lett-
hand threads.
• There are two block drains. one on either side 01 the
engine.
It is
not necessary to remove both plugs if only
one head is being remove d.