TROUBLESHOOTING
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002 Page 1C-21
Camshaft Area
Location Possible Causes
1. Camshaft area, front of engine, timed
to engine speed
1. A. Camshaft timing gear
B. Injection pump
C. Fuel pump
D. Valve lifter - camshaft wear
E. Cam bearings
2. Camshaft area, center of engine,
timed to engine speed
2. A. Fuel pump
B. Valve lifter - camshaft wear
C. Cam bearings
3. Camshaft area, rear of engine, timed
to engine speed
3. A. Valve lifter - camshaft wear
B. Cam bearings
4. Camshaft area, throughout engine,
timed to engine speed
4. A. Loss of oil pressure
B. Valve lifter - camshaft wear
C. Cam bearings
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