11 34 552 Removing And Installing/Replacing All Valves (N62)

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(cylinder head removed)

Preliminary tasks are described in DISASSEMBLING AND ASSEMBLING CYLINDER HEAD .

Remove valve springs.

REMOVE VALVE STEM SEALS .

Remove valves from cylinder head.

Installation:

If necessary, check valve guide for wear.

IF NECESSARY, REMACHINE VALVE SEAT .

IMPORTANT:

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 1: Identifying Valve Springs Of Inlet Valves And Exhaust Valves
Courtesy of BMW OF NORTH AMERICA, INC.

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 is decisive for the correct installation of the valve springs.

Install valve spring so that larger diameter points to spring plate at bottom.

Fig 2: 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 3: Identifying Valve, Valve Spring And Top Plate Spring
Courtesy of BMW OF NORTH AMERICA, INC.