11 34 715 Replacing all valve springs (N54)

Special tools required:

IMPORTANT: Different valve stem diameters.
Mixing up the valve springs will result in damage to the engine.

Necessary preliminary tasks:

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 .

Fig 1: Pressing Intake Valve Spring Down On Spring Cup With Special Tools

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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 .

Fig 2: Pressing Exhaust Valve Spring Down On Spring Cup With Special Tools

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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.

Fig 3: Removing Valve Spring And Spring Retainer

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IMPORTANT: Incorrect installation possible.
Incorrect installation will result in valve spring breakage!

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

Fig 4: Identifying Color Marking On Lower End Of Valve Spring

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Installation note:

Intake: Violet/green or violet/yellow

Exhaust: 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:

Fig 5: Exploded View Of Valve Assembly

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Assemble engine.

Check function of DME control unit.