Remachining Valve Seat; Installing Valve And Valve Stem Seal - BMW k 1200 rs Repair Manual

2
3
4
•
Remove valve collets (1) with a magnetised
screwdriver.
•
Release valve spring clamp (3) and take out up-
per spring retainer (2), valve spring and lower
spring retainer (4).
•
Take out the valve stem seal with special pliers,
BMW No. 11 1 250.

Remachining valve seat

D = valve diameter
B = valve seat width
•
When remachining, the correct width of the valve
seat must always be maintained.
L
Note:
Machine the valve seat with turning tool,
BMW No. 11 0 500.
•
If the valve seat has been remachined, a new
valve must be installed.
11.20

Installing valve and valve stem seal

1
L
If a valve is removed, the valve stem seal must be re-
newed.
•
Oil the stem when installing the valve.
•
Insert the lower spring retainer.
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•
Place a shrink-fit tube approx. 20 mm (0.7874 in)
long, on the valve stem and heat it up.
•
Drive in valve stem seal (1) with the assembly
tool, BMW No. 11 1 602, until resistance is felt.
D
e
Remove the shrink-fit sleeve from the valve stem.
•
Insert the valve spring.
•
Install the upper spring retainer.
e
Centre the compressor in order to avoid damaging
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the tappet bores.
•
Compress the valve spring, lightly oil the valve
collets and insert them, then release the spring.
•
Clean and oil the bucket-type tappets before in-
serting.
Note:
Important:
Important:
1
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