11 34 715 Replacing all valve springs (N12)

WARNING: This page is about a different variant/trim than selected.

Necessary preliminary tasks:

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

Fig 1: Placing Cylinder Head On Special Tool

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

Fig 2: Identifying Special Tools (11 9 007) And (11 9 006)

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Align special tool 11 9 006.

Lock eccentrics (1) on special tool 11 9 000 in direction of arrow.

Fig 3: Locking Eccentrics On Special Tool (11 9 000)

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

Fig 4: Pressing Valve Spring And Spring Retainer Using Special Tool (11 9 017)

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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 5: Removing Valve Spring And Plate Spring

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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.

Only the diameter pointing to the spring retainer at the bottom is required for correct installation of the valve spring.

Fig 6: Identifying Valve Spring Dimensions

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Arrangement:

Fig 7: Exploded View Of Valve Assembly

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Assemble engine.

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