Valve Spring: Service and Repair

11 34 715 Replacing all valve springs (N54, N54T)

Special tools required:





Important!
Different valve stem diameters.
Mixing up the valve springs will result in damage to the engine.

Necessary preliminary tasks:
^ Remove cylinder head cover
^ Remove cylinder head.
^ Remove exhaust camshaft.





^ Remove intake camshaft
^ Remove roller cam followers





Intake valves:
Fit cylinder head on special tool 11 9 000.

Press valve spring down on spring cup with special tools 11 0 009 and 11 9 017.





Exhaust valves:
Fit cylinder head on special tool 11 9 000.

Press valve spring down on spring cup with special tools 11 0 009 and 11 0 346.

Remove valve tapers with a magnet.

Remove valve spring and spring retainer.





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





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

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

Installation note:
Einlassventil: Violet/green or violet/yellow

Auslassventil: White/green or white/yellow

If the colors on the valve springs can no longer be identified, these must be replaced for safety reasons.

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








Assemble engine.

Check function of DME control unit.