11 34 715 Replacing All Valve Springs (N62)

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

For Special Tool identification, refer to ENGINE - SPECIAL TOOLS - 645CI .

Special Tools Required:

11 0 346
11 9 470

(cylinder head removed)

Preliminary tasks are described in Disassembling and assembling cylinder head, refer to 11 12 503 DISASSEMBLING AND ASSEMBLING CYLINDER HEAD (N62/N62TU) .

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 11 31 034 REMOVING AND INSTALLING/REPLACING RIGHT INLET CAMSHAFT (N62 FROM 9/03 AND N62TU) .

Removing and installing inlet camshaft.

Fig 1: Removing Bearing Bracket With Inlet Camshaft

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Remove exhaust camshaft.

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

Fig 2: Aligning Special Tool 11 0 346 In Direction Of Valve Shaft

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

Fig 3: Pressing Down Valve Spring On Spring Cap, Top, And Removing Valve Keys

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CAUTION: Incorrect installation possible. Valve springs of exhaust and inlet camshafts are different. Incorrect installation will result in engine damage.

NOTE: Valve springs for exhaust valves are approx. 4 mm longer.

Valve springs of inlet valves
Valve springs of exhaust valves

Fig 4: Identifying Difference Between Dimensions Of Inlet And Exhaust valves
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CAUTION: 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 5: Identifying Color Marking On Lower End Of Valve Spring

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Arrangement:

Fig 6: Identifying Arrangement Of Valve

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