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10-6
SERVICING
INFORMATION
Complaint
Symptom and possible causes
Remedy
Noisy engine. Excessive valve chatter
1. Too large tappet clearance. Adjust.
2. Weakened or broken valve springs. Replace.
3. Worn tappet or cam surface.
Replace.
4. Worn and burnt camshaft journal.
Replace.
Noise seems to come from piston
1. Worn down pistons or cylinders. Replace.
2. Fouled with carbon combustion chambers. Clean.
3. Worn piston pins or piston pin bore. Replace.
4. Worn piston rings or ring grooves.
Replace.
Noise seems to come from timing chain
1. Stretched chain. Replace.
2. Worn sprockets.
Replace.
3. Not working tension adjuster.
Repair or replace.
Noise seems to come from clutch
1. Worn splines of countershaft or hub.
Replace.
2. Worn teeth of clutch plates.
Replace.
3. Distorted clutch plates, driven and drive. Replace.
4. Worn clutch release bearing.
Replace.
5. Weakened clutch dampers. Replace the primary
driven gear.
Noise seems to come from crankshaft
1. Due to wear rattling bearings.
Replace.
2. Worn and burnt big-end bearings.
Replace.
3. Worn and burnt journal bearings.
Replace.
4. Too large thrust clearance.
Replace thrust bearing.
Noise seems to come from balancer
1. Worn and burnt journal bearings.
Replace.
Noise seems to come from transmission
1. Worn or rubbing gears. Replace.
2. Worn splines.
Replace.
3. Worn or rubbing primary gears. Replace.
4. Worn bearings. Replace.
Noise seems to come from water pump
1. Too much play on pump shaft bearing. Replace.
2. Worn or damaged impeller shaft. Replace.
3. Worn or damaged mechanical seal. Replace.
4. Touches pump case and impeller. Replace.