TROUBLESHOOTING
SERVICE MANUAL NUMBER 23
Page 1C-17
90-861326--1 MARCH 1999
Camshaft Area
Location
Possible Causes
Crankshaft timing sprocket
Camshaft area, front of engine, timed to
Timing chain
g
one half engine speed
Valve Lifter
Cam Bearings
C
h ft
t
f
i
ti
d t
Fuel Pump
Camshaft area, center of engine, timed to
one half engine speed
Valve Lifter
g
Cam bearing
C
h ft
f
i
ti
d t
Distributor gear
Camshaft area, rear of engine, timed to
one half engine speed
Valve lifter
g
Cam bearings
C
h ft
th
h
t
i
ti
d
Loss of oil pressure
Camshaft area, throughout engine, timed
to one half engine speed
Valve lifters
g
Cam bearings
Crankshaft Area
Location
Possible Causes
Crankshaft timing sprocket
Crankshaft area, front of engine, timed to
Timing chain
g
engine speed
Main bearing
Rod bearing
C
k h ft
t
f
i
ti
d
Crankshaft striking pan or pan baffle
Crankshaft area, center of engine, timed
to engine speed
Main bearing
to engine s eed
Rod bearing
Loose flywheel cover
C
k h ft
f
i
ti
d t
Loose coupler
Crankshaft area, rear of engine, timed to
engine speed
Loose flywheel
engine s eed
Main bearing
Rod bearing
C
k h ft
th
h
t
i
ti
d
Loss of oil pressure
Crankshaft area, throughout engine, timed
to engine speed
Main bearings
to engine s eed
Rod bearings
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