11 34 715 Replacing All Valve Springs (N62TU)

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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.

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

Courtesy of BMW OF NORTH AMERICA, INC.

Remove exhaust camshaft.

Using special tool (11 0 346), press down valve spring on spring cap, top, and remove valve keys.

Fig 2: Removing Valve Spring On Spring Cap

Courtesy of BMW OF NORTH AMERICA, INC.

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 3: Identifying Color Marking On Lower End Of Valve Spring

Courtesy of BMW OF NORTH AMERICA, INC.

Arrangement:

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

Fig 4: Identifying Valve, Valve Spring And Top Plate Spring
Courtesy of BMW OF NORTH AMERICA, INC.