BMW 5251 Service Manual page 96

11 3-2
Cylinder Head Removal and Installation
This group covers cylinder head removal and installation as
well as cylinder headlvalve diagnostic procedures.
In the procedures in this repair group, engines are referred to
by engine code. If necessary, see 100 Engine-General for
engine code and application information.
The information given in this repair group assumes that the
engine is installed in the engine bay. On the 6-cylinder en-
gines, the VANOS control unit must be removed in orderto re-
move the cylinder head from the engine block. On M52TU
and M54 engines, camshafts must be removed from the cylin-
der head before the head is removed.
The cylinder head removal and installation procedures for the
M62 V-8 are also included, butthe proceduresforthe M62TU
V-8 with VANOS are not provided.
For cylinder head and valvetrain reconditioning information,
see 116 Cylinder Head and Valvetrain.
For specific repair procedures, refer to the appropriate repair
group:
020 Maintenance
116 Cylinder Head and Valvetrain
117 Camshaft Timing Chain
170 Radiator and Cooling System
610 Component locations
NOTE-
I f a head gasket problem is suspected, a compression test or
leak-down test will usually detect the fault See Diagnostic
Testing later in this group.
Special tools
Special BMW service tools are required to properly remove
and install the cylinder head on engines covered by this man-
ual. The special tools are used to time the valvetrain to the
crankshaft, and to remove the VANOS control unit, the cam-
shafts and the Tom (El2) head bolts. Read the entire proce-
dure through before beginning the job.