Cooling System Troubleshooting - Toyota 7M-GE Repair Manual

co-4
CQOLING SYSTEM - Troubleshootmg
TROUBLESHOOTING
,
Problem
Engine overheats
Possible cause
Alternator drive belt loose or missing
Dirt, leaves or insects in radiator or
condenser
Hoses, water pump, water outlet
housing, radiator, heater, core plugs
or head gasket leakage
Thermostat faulty
Ignition timing
retarded
Fluid coupling faulty
Radiator hose plugged or rotted
Water pump faulty
Radiator plugged or cap faulty
Cylinder head or block cracked or
phwd
Remedy
Adjust or replace belt
Clean radiator or condenser
Repair as necessary
Check thermostat
Set timing
Replace fluid coupling
Replace hose
Replace water pump
Check radiator
Repair as necessary
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