3 Series E46 M3 (S54) CONVER
11 34 552
Removing and installing or replacing all
valves - cylinder head removed (S54)
Preliminary tasks are described in Disassembling and assembling
cylinder head.
Replace valve stem seals.
Remove valves from cylinder head.
If necessary, check valve guide for wear.
If necessary, remachine valve seat.
Caution!
Incorrect installation possible.
Incorrect installation will result in valve spring breakage.
The valve spring coils are narrower at the lower ends.
The color coding (3) is normally located at the lower end of the
valve springs.
Only the position of the narrower coil is the decisive factor in
correct installation of the valve springs (1 and 2).
Install valve springs (1 and 2) in such a way that lower coil
points to spring plate at bottom.
Arrangement:
1)
Valve
2)
Lower plate spring
3)
Valve-stem seal
4)
Outer spring
5)
Inner spring
6)
Top spring plate
7)
Valve tapers
RA Removing and installing or replacing all valves - cylinder head removed (S54)
BMW AG - TIS
16.02.2013 08:56
Issue status (12/2007) Valid only until next DVD is issued
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