11 34 715 Replacing All Valve Springs (N62TU)

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

Special tools required:

11 0 346
11 9 470

(cylinder head removed)

Preliminary tasks are described in DISASSEMBLING AND ASSEMBLING CYLINDER HEAD .

Remove bearing bracket (1) with inlet camshaft and stow in special tool 11 9 470 . The procedure is described in 11 31 032 REMOVING AND INSTALLING/REPLACING LEFT INLET CAMSHAFT (N62 FROM 9/03 AND N62TU) or 11 31 034 REMOVING AND INSTALLING/REPLACING RIGHT INLET CAMSHAFT (N62 FROM 9/03 AND N62TU) .

Fig 1: Identifying Special Tool (11 9 470) And (11 9 473)

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Remove exhaust camshaft.

Align special tool 11 0 346 in direction of valve shaft.

Fig 2: Identifying Special Tool (11 0 346)

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Press down valve spring on spring cap, top, and remove valve keys.

Fig 3: Removing Valve Keys

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IMPORTANT: Incorrect installation possible.
Incorrect installation will result in valve spring breakage.
The color coding (1) is normally located on the lower end of the valve spring.
Only the diameter is decisive for the correct installation of the valve springs.
Install valve spring so that larger diameter points to spring plate at bottom.

Fig 4: Identifying Color Marking Of Valve Spring

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Arrangement:

Valve
Valve stem seal with spring plate, bottom
Valve spring
Top plate spring
Valve tapers

Fig 5: Identifying Valve Stem Seal With Spring Plate And Top Plate Spring
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