Valve Spring: Service and Repair

11 34 715 - Replacing all valve springs (N54)





Special tools required:
- 11 0 009
- 11 0 346
- 11 4 480 11 4 480 Oddments Tray
- 11 9 000 11 9 000 Device
- 11 9 017





Important!
Different valve stem diameters.

Mixing up the valve springs will result in damage to the engine.





Necessary preliminary tasks:
- Remove cylinder head cover Service and Repair
- Remove cylinder head Removal and Replacement.
- Remove exhaust camshaft Removing and Installing/Replacing Exhaust Camshaft
- Remove inlet camshaft Removing and Installing/Replacing Inlet Camshaft
- Remove roller cam followers Service and Repair





Intake valves:

Place cylinder head on special tool 11 9 000.

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





Exhaust valves:

Place cylinder head on special tool 11 9 000.

Press valve spring down on spring retainer 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:
Intake valve: - Violet/green or violet/yellow
Exhaust valve: - White/green or white/yellow
If the colours 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 cotters





Assemble engine.

Check function of DME control unit.