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In order for an engine to run smoothly and efficiently, the combustion
chamber must be free of leakage. An
engine with low compression in one or more cylinders is inefficient and will run
rough or lack in performance.
Low compression may or may not cause the MIL to illuminate.
Low compression ca
REMOVING AND INSTALLING/REPLACING ALL VALVES (N62) (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 ne