7. CYLINDER HEAD/VALVES
7-2
TROUBLESHOOTING
Camshaft locating bolts 2.0 kg-m
Valve clearance adjusting nut 0.9 kg-m
Engine temperature sensor 0.75 kg-m
Poor performance at idle speed
Compression too low
TORQUE VALUES
Compression too low
1. Incorrect valve clearance adjustment
2. Burned or bend valves
3. Incorrect valve timing
4. Broken valve spring
5. Valve seat leak
6. Leaking cylinder head gasket
7. Warped or cracked cylinder head
8. Poorly installed spark plug
Compression too high
Excessive carbon build-up in combustion
chamber
White smoke from exhaust muffler
1. Worn valve stem or valve guide
2. Damaged valve stem seal
Abnormal noise
1. Incorrect valve clearance adjustment
2. Sticking valve or broken valve spring
3. Damaged or worn camshaft
4. Worn cam chain guide
5. Worn camshaft and rocker arm
Valve spring compressor E040
SPECIAL TOOL
Movie S 125i
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