Rear - BMW 1989-1995 525i Service Manual

CYLINDER HEAD AND VALVETRAIN
116-3
6 110B6
00 11 540
Fig. 4. ldle air stabnzer valve and bracket. M flow sensor connector.
ano bose clamps to be removed/disconnected (arrow s).
Fig . 6. Cylincler head cover fasteners (arrow s).
NOTE -
On late model cars. the battery is mounled beneath the
rear seat cushion.
WARNING-
Disconnecting the battery cables may erase lault
codes stored in control unit memory.
1. Disconnect the negative (-) battery cable.
To replace cylinder head cover gasket
(M50 engine)
\
Tightening Torque
• Cylinder head cover to
cylinder head 10 Nm (89 in-lb)
Fig . 5. Air now sensor mounting clips on M30 engine (arrow s).
2. Disconnect the crankcase ventilation hose fitting from
the cylinder head cover. See Fig. 7.
3. Disconnect the center wire from the ignition coil. Dis-
connect the ignition wires from the spark plugs. Re-
move the ignition wiring harness mo unting nuts and
place the harness out of the way.
4. Disconnect the breather hose from the cylinder head
cover. Remove the nuts and bolts shown in Fig. 6. Lift
off the cylinder head cover and its gaske t.
3. Remove the top engine covers. See Fig. 8.
4. Disconnect ignition coil harness connectors from the
coils. Remove the ignition coil mounting nuts and lift
coils straight off. See Fig. 9.
5. Remove the cylinder head cover mounting bolts and
remove the cylinder head cover. See Fig. 10.
5. Install a new gasket and the cylinder head cover.
6. Installation is the reverse of removal. Be sure to recon-
nect all hoses. Tighten the mounting nuts and bolts us-
ing a similar sequence as shown above in Fig. 3.
NOTE -
The cylinder head cover mounting bolt insulators and
gaskets must be reinstalled in the same order. Make
note 01 their arrangement during removal.
CYLINDER HEAD COVER GASKET REPLACEMENT