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18-4 APPENDIX
Troubleshooting Guid e
Fan blade damaged
Water pump not turning
Water pump impeller damaged
Over Cooling:
Cooling system component incorrect:
Radiator fan switch trouble
Thermostat trouble
Converter Operation Faulty:
Belt slipping:
Belt dirty, worn, or wetted
Drive or driven pulley sheave dirty or worn
Drive pulley spring broken or weak
Converter engagement speed too low:
Drive pulley spring broken or weak
Converter engagement speed too high:
Belt dirty or worn
Drive or driven pulley sheave dirty or worn
Drive pulley weight doesn’t move smoothly
Drive pulley movable sheave doesn’t move
smoothly
Drive or driven pulley movable sheave bush
worn
Drive pulley weight or roller worn
Shifting too quickly:
Drive pulley spring weak
Driven pulley spring weak or incorrectly in-
stalled (too loose)
Shifting too slowly:
Belt dirty or worn
Drive or driven pulley sheave dirty or worn
Drive pulley weight doesn’t move smoothly
Drive pulley movable sheave doesn’t move
smoothly
Drive pulley spring incorrect installed (too
tight)
Driven pulley movable sheave doesn’t
move smoothly
Gear Shifting Faulty:
Doesn’t go into gear:
Shift arm bent or seized
Gear stuck on the shaft
Shift tie-rod maladjusted
Shift tie-rod damaged
Jumps out of gear:
Shifter groove worn
Gear dogs worn
Shift block worn
Shift arm positioning bolt spring weak or
broken
Shift tie-rod maladjusted
Drive shaft, output shaft, and/or gear
splines worn
Overshifts:
Shift arm positioning bolt spring weak or
broken
Shift tie-rod maladjusted
Abnormal Engine Noise:
Knocking:
Igniter trouble
Carbon built up in combustion chamber
Fuel poor quality or incorrect
Spark plug incorrect
Overheating
Piston Slap:
Cylinder/piston clearance excessive
Cylinder, piston worn
Connecting rod bent
Piston pin, piston holes worn
Valve noise:
Valve clearance incorrect
Valve spring broken or weak
Camshaft bearing worn
Rocker arm worn
Other noise:
Connecting rod small end clearance exces-
sive
Connecting rod big end clearance exces-
sive
Piston ring worn, broken, or stuck
Piston seizure, damage
Cylinder head gasket leaking
Exhaust pipe leaking at cylinder head con-
nection
Crankshaft runout excessive
Engine mounts loose
Crankshaft bearing worn
Camshaft chain tensioner trouble
Camshaft chain, sprocket, guides worn
Loose alternator rotor
Abnormal Drive Train Noise:
Converter noise:
Belt worn
Drive or driven pulley sheave worn
Drive or driven pulley movable sheave bush
worn
Drive or driven pulley mount loose
Driven pulley shoe worn
Drive pulley weight or roller side washer
worn
Drive pulley weight or roller worn
Wear guides worn
Transmission noise:
Bearing worn
Transmission gears worn or chipped
Metal chips jammed in gear teeth
Engine oil insufficient or too thin
Front or rear final gear case noise:
Insufficient lubricant
Incorrect oil (Front final gear case)
Bevel gear bearings worn
Bevel gears worn or chipped
Bevel gears maladjusted