Valve: Service and Repair

11 34 552 - Removing and installing/replacing all valves (N62)

(cylinder head removed)
Preliminary tasks are described in Disassembling and assembling cylinder head Disassembling and Assembling Cylinder Head (N62/N62TU).





Remove valve springs Service and Repair.
Remove valve stem seals Service and Repair.
Remove valves from cylinder head.

Installation:
If necessary, check valve guide for wear Testing and Inspection.
If necessary, remachine valve seat Remachining a Valve Seat - Cylinder Head Disassembled (N62).





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.

1) - Valve springs of inlet valves
2) - Valve springs of exhaust valves





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.





Arrangement:
(1) - Valve
(2) - Valve stem seal with spring plate, bottom
(3) - Valve spring
(4) - Top plate spring
(5) - Valve tapers