Valve Spring: Service and Repair

11 34 715 Replacing all valve springs (N18)

Special tools required:





Necessary preliminary work:
^ Remove cylinder head cover.
^ Remove cylinder head.
^ Remove exhaust camshaft.
^ Remove intake camshaft.
^ Remove roller cam follower.





Mount cylinder head (1) on special tool 11 9 000.





Prepare special tool 11 9 007 on special tool 11 9 006.





Align special tool 11 9 006.

Lock eccentric (1) on special tool 11 9 001 in direction of arrow





Press down valve spring and spring cup (1) with special tool 11 9 017.





Remove valve keys with a magnet.

Remove valve spring and spring cup.

Set down on special tool 11 4 480 in a tidy and orderly fashion.





Important!
Incorrect assembly possible.
Incorrect assembly will result in valve spring breakage.

Colour coding (1) is normally on lower end of valve spring.

The larger diameter must point downwards to the valve stem seal.





Arrangement:
1) Valve
2) Valve stem seal with spring cup, bottom
3) Valve spring
4) Top spring cup
5) Valve keys





Assemble engine.

Check function of DME.