Symptoms
|
Possible Causes
|
Remedy
|
Coolant leakage
|
| •
|
From the bleed hole of the water pump
|
|
Visually check
|
| •
|
Check leaks after about ten-minute warming up.
|
|
| •
|
If coolant still leaks, replace a water pump.
|
|
| •
|
If leakage stops, reuse the water pump (Do not replace
the pump with a new one).
|
|
|
|
| •
|
Check the tightening of the water pump mounting bolts.
|
|
| •
|
Retighten the mounting bolts.
|
|
| •
|
Check damage of gaskets or inflow of dust.
|
|
| •
|
Replace the gasket and clean dust off.
|
|
| •
|
From outer surface of water pump
|
|
| •
|
Check the material or any cracks of the water pump.
|
|
| •
|
Poor material. If any crack found, replace the water pump.
|
|
Noise
|
|
Inspection with a stethoscope
|
| •
|
After starting the engine, check noise with a stethoscope.
|
|
| •
|
If there is no noise, reuse the water pump (do not replace
it).
|
|
| •
|
If there is any noise from the water pump, remove the
drive belt and recheck.
|
|
Inspection after removing a drive belt
|
| •
|
After removing a water pump and a drive belt, check noise
again.
|
|
| •
|
If there is noise, reuse the water pump. Check other drive
line parts.
|
|
| •
|
If there is no noise, replace the water pump with a new
one.
|
|
Inspection after removing a water pump
|
| •
|
After removing a water pump and a drive belt, check noise
again.
|
|
| •
|
If there is any interference between them, replace the
water pump with a new one.
|
|
Overheating
|
|
Loosened impeller
|
| •
|
Corrosion of the impeller wing
|
|
| •
|
Poor coolant quality / Maintenance check
|
|
| •
|
Impeller seperation from the shaft
|
|
| •
|
Replace the water pump.
|
|
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 blowed-out)
|
| •
|
Thermogauge indicates 'LOW'
|
|
Visually check after removing the radiator cap.
|
| •
|
Insufficient coolant or leakage.
|
|
| •
|
After refilling coolant, recheck.
|
|
GDS check&Starting engine
|
| •
|
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.
|
| •
|
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.
|
|
Hyundai Elantra HD: Troubleshooting
