Troubleshooting - Toyota TERCEL 1985 Repair Manual

CO-2
Problem
Engine overheats
NOTE: The thermostat on the 3A and 3A-C engines is equipped with a by-pass valve. Therefore, if the
engine tends to overheat, removal of the thermostat would have an adverse effect, causing a lowering of
cooling efficiency.
COOLING SYSTEM - Troubleshooting

TROUBLESHOOTING

Possible cause
Water pump drive belt loóse or missing
Dirt, leaves or insects on radiator
Hoses, water pump, thermostat housing,
radiator, heater, core plugs or head gasket
leakage
Thermostat faulty
Ignition timing retarded
Electric cooling system faulty
Radiator hose plugged or rotted
Water pump faulty
Radiator plugged or cap faulty
Cylinder head or block cracked or plugged
Remedy
Adjust or replace belt
Clean radiator
Repair as necessary
Check thermostat
Set timing
Inspect electric cooling system
Replace hose
Replace water pump
Check radiator
Repair as necessary
Page
EM-13
CO-11
CO-18
CO-4
CO-12