TROUBLESHOOTING
Page 65
LOW COMPRESSION
FUEL IN LUBE OIL
Possible Cause
Correction
1. Improper valve lash adjustment.
1. Adjust valve lash to specified clearance.
2. Blown head gasket.
2. Replace head gasket.
3. Broken or weak valve springs.
3. Check and replace defective parts as required.
4. Valves not seating properly.
4. Remove, recondition and reinstall heads.
5. Piston rings stuck, worn, broken or improperly
seated.
5. Determine and correct root cause and repair engine as required.
6. Camshaft or valve lifters worn.
6. Replace camshaft and/or valve lifters and perform any other
necessary repairs as required.
Possible Cause
Correction
1. Excessive idling, especially in cold weather.
1. Minimize idling time and use all recommended cold weather
accessories.
2. Injector nozzle malfunctioning.
2. Remove and pop-test nozzles. Clean or replace nozzles as
required.
3. Unit pump O-ring leaking.
3. Replace O-rings.
5_106_00.bk Page 65 Friday, August 4, 2000 11:17 AM
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