COOLING Specifications Troubleshooting
SEALANT AND ADHESIVE
Items
Specified sealants and adhesive
Engine coolant temperature gauge unit
Engine coolant temperature sensor (Engine control)
Engine coolant temperature sensor (Air conditioner)
3M Nut Locking Part No. 4171
Symptom
Overheat
Probable cause
Insufficient engine coolant
Too high an anti-freeze concentration
Inoperative electric cooling fan
Faulty thermosensor
Faulty electrical motor
Faulty radiator fan relay
Remedy
Replenish
Correct anti-freeze concentration
Replace
Damaged or blocked (insufficiently ventilated)
radiator fins
Correct
Water leaks
Damaged radiator core joint
Corroded or cracked hoses
(radiator hose, heater hose, etc.)
Faulty cap valve or setting of spring
Cracked thermostat housing
Loose water pump mounting bolt or leaking
gasket
Replace
Loose bolt or leaking gasket in water outlet
Correct or replace
fitting
Loose bolt or leaking gasket in water inlet
fitting
Loose thermostat housing bolts or leaking
from gasket
Retorque bolts or replace gasket
Faulty automatic transaxle oil cooler operation
Blocked or collapsed hose and pipe
Replace
Loose hose and pipe connection
Correct
Faulty thermostat operation
Replace
Faulty water pump operation
Replace
Water passage clogged with slime or rust deposit
Clean
or foreign substance
No rise in temperature
Faulty thermostat
Replace
TSB Revision
Summary of Contents for 3000GT 1991
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