Special Tools - BMW 5251 Service Manual

This group covers cylinder head and valvetrain service and
repair. Some of the repair procedures described here require
that the cylinder head first be removed as described in
113
Cylinder Head Removal and Installation.
NOTE-
For timing chain and VANOS repair information, see 117
Camshaft Timing Chain.
If it is determined that the cylinder head will require signif-
icant reconditioning work, a remanufactured cylinder head
may be a good alternative. Remanufactured cylinder
heads are available from an authorized BMW dealer.
The information given in this repair group is organized ac-
cording to engine code. For engine application information,
see I00 Engine-General.
For specific repair procedures, refer to the appropriate repair
group:
* 020
Maintenance
100
Engine-General
113
Cylinder Head Removal and Installation
117 Camshafi Timing Chain
= 170
Radiator and Coo!ing System
Special Tools
Special BMW tools are required for most cylinder head ser-
vice described in this repair group. Many of these tools are ex-
pensive and only available through an authorized BMW
dealer. If the special tools are not available, have the cylinder
head removed and disassembled by an authorized BMW
dealer. Be sure to read each procedure thoroughly before
starting a job to determine which special tools and equipment
will be necessary.
Most of the repairs to a cylinder head require precision rna-
chine work to specific tolerances. This type of work should be
performed by an authorized BMW repairfacility or an ASE
certified machinist.
7 1 Torque wrench with flex shaft