11 34 715 Replacing all valve springs (N52K)

WARNING: This page is about a different car, the 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Place cylinder head on special tool 11 9 000.

Press down inlet valves with special tool 11 9 017.

Press down exhaust valves with special tool 11 0 346.

Fig 1: Pressing Down Inlet Valves Using Special Tool (11 9 017)

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Remove valve cotters with a magnet.

Remove valve spring with spring plates.

If the individual components are to be reused, they must be placed in neat order in special tool 11 4 480.

Fig 2: Removing Valve Spring And Plate Spring

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IMPORTANT: Incorrect installation possible.
Incorrect installation will result in valve spring breakage.
Risk of mixing up the valve springs for the inlet and exhaust valves.

The valve spring is colour-coded (1) at the lower end.

Install the valve spring so that the larger diameter points to the lower spring plate.

Fig 3: Identifying Valve Spring Dimensions

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Arrangement:

Valve
Valve stem seal with lower spring plate
Valve spring
Upper spring plate
Valve tapers

Fig 4: Identifying Upper/Lower Spring Plate, Valve Spring And Valve Stem Seal

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Assemble engine.

Check function of DME; if necessary, readjust uniform mixture distribution.