Symptoms
|
Possible Causes
|
Remedy
|
Coolant leakage
|
| • |
From the thermostat gasket |
|
Check the mounting bolts
|
| • |
Check the torque of the
mounting bolts |
|
| • |
Retighten the bolts and
check leakage again. |
|
Check the gasket for damage
|
| • |
Check gasket or seal
for damage |
|
| • |
Replace gaskets and reuse
the thermostat. |
|
Cooled excessively
|
| • |
Low heater performance
(cool air blows-out) |
| • |
Thermogauge indicates
'LOW' |
|
Visually check after removing the radiator cap.
|
| • |
Insufficient coolant
or leakage. |
|
| • |
After refilling coolant,
recheck. |
|
GDS check&Starting engine
|
| • |
Check the fan motor performance
as temperature varies. |
| • |
Check connection of the
fan clutch or the fan motor. |
※ If the fan clutch is always connected, there will be a noise at idle.
|
| • |
Check the engine coolant
sensor, wiring and connectors. |
| • |
Check the fan motor,
the relay and the connector. |
| • |
Replace the componants. |
|
Remove the thermostat and inspect
|
| • |
Check if there are dusts
or chips in the thermostat valve. |
| • |
Check adherence of the
thermostat. |
|
| • |
Clean the thermostat
valve and reuse the thermostat. |
| • |
Replace the thermostat,
if it doesn't work properly. |
|
Heated excessively
|
| • |
Thermogauge indicates
'HI' |
|
Visually check after removing the radiator cap.
|
| • |
Insufficient coolant
or leakage. ※ Be careful when removing a radiator cap of the overheated
vehicle.
|
| • |
Check air in cooling
system. |
|
| • |
After refilling coolant,
recheck. |
| • |
Check the cylinder head
gaskets for damage and the tightening torque of the mounting bolts. |
|
GDS check&Starting engine
|
| • |
Check the fan motor performance
as temperature varies. |
| • |
Check if the fan clutch
slips. |
| • |
Check the water pump
adherence or impeller damaged. |
|
| • |
Check the engine coolant
sensor, wiring and connectors. |
| • |
Check the fan motor,
the relay and the connector. |
| • |
Replace the fan clutch,
if it doesn't work properly. |
| • |
Replace the water pump,
if it doesn't work properly. |
|
Immerse the thermostat in boiling water and inspection.
|
| • |
After removing the thermostat,
check it works properly. |
※ Check the thermostat opens at the valve opening temperature.
|
| • |
Replace the thermostat,
if it doesn't work properly. |
|
See also:
Climate control seat (if equipped)
The climate control seat is provided to cool or warm the seat during hot or cold
weather by blowing air through small vent holes on the surface of the seat and seatback.
While the engine is runn ...
Inspection
TCM Problem Inspection Procedure
1.
TEST TCM GROUND CIRCUIT: Measure
resistance between TCM and chassis ground using the backside of TCM harness
connector as TCM side check point. If ...
Disassembly
•
Do not disassemble the
BJ assembly.
•
Special grease must be
applied to t ...
Kia Optima: Thermostat. Troubleshooting
Inspection
