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Engine Noise (Continued)
Symptom
5. Noise in camshaft area
(center of engine).
6. Noise in camshaft area
(rear of engine).
7. Noise in crankshaft area
(throughout engine).
8. Noise in crankshaft area
(front of engine).
9. Noise in crankshaft area
(center of engine).
10. Noise in crankshaft area
(rear of engine).
11. Engine spark knock.
12. Popping through
carburetor.
13. Hissing.
14. Whistle.
15. Sparks jumping.
16. Squeaks or squeals.
LP Engine G430 (3.0L)
Cause
A. Valve lifter.
B. Cam bearings.
A. Distributor gear.
B. Valve lifter.
C. Cam bearings.
A. Loss of oil pressure.
B. Main bearings.
C. Rod bearings.
A. Crankshaft timing gear.
B. Timing chain.
C. Main bearing.
D. Rod bearing.
A. Crankshaft striking pan or pan baffle.
B. Main bearing.
C. Rod bearing.
A. Loose flywheel cover.
B. Loose flywheel.
C. Drive plate.
D. Main bearing.
E. Rod bearing.
A. Advanced timing.
B. Low quality fuel.
C. Engine running hot.
D. Carbon deposits in engine.
A. Wrong ignition timing.
B. Carburetor set too lean.
C. Faulty accelerator pump (gasoline).
D. Vacuum leak.
E. Valve adjustment.
F. Valve timing.
G. Burned or stuck valve.
A. Vacuum leak.
B. Leaking exhaust (manifolds or pipes).
C. Loose cylinder heads.
D. Blown head gasket.
A. Vacuum leak.
B. Dry or tight bearing in an accessory.
A. Defective high-tension cables.
B. Cracked coil tower.
C. Cracked distributor cap.
A. Drive belt slipping.
B. Dry or tight bearing in an accessory.
C. Parts rubbing together.
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Troubleshooting
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