BMW 1989-1995 525i Service Manual page 106

116-8
CYLINDER HEAD AND VALVETRAIN
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Bll 095
Fig . 17. Distributor rotor adap tor and cam shaft sprocket mounting
bolt being removed Sprocket is being held stat ionary with a
stnp at leall1 er and Vise-grips. On
1110 S
cars. r010r adapter is
rewlnecl by a Torx bolt
IE
12 wrench size).
uote -:
II
may be necessary to immobilize the camshaft drive
belt sprocket white breaking the bolt loose.
3. Remove the camshaft oil seal housing mounting bolts.
Remove the housing by rotating it all the camshaft. See
Fig. 18.
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. . . .
ru
1
s
Fig. 18. Carnsna
a ll
seal hoosmq at root 01cyflneJer head . Rotate
ad
seal carrier cluring removal (a rrow ).
4. Adjust the valves to maximum clearance by loosening
the adjusting eccentric locknut. Rotate the eccentric
until the adjusting hole is facing inward.
CYLINDER HEAD DISASSEMBLY AND ASSEMBLY
5. Remove the rocker arm retainers by lifting them
straight off. Note that the straight leg of the clamp fits
into the slot in the rocker arm shaft. Lift out the rocker
arm shaft guide plate. See Fig. 19.
Fig. 19. Rocker arm retainer (1) and rocker arm shaft glllde plate 1 2).
Note how guide plate fits into notch In rocke r arms shat s.
6. Remove the four rubber plugs from the front and rear
of the cylinder head. See Fig. 20.
,
Fig .
20.
Rubber retall1lng plug bell"lg removed trom cvnnoer head .
7. Temporarily mount the distributor rotor adaptor to the
front of the camsha ft.