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).
|
|
| •
|
From gaskets or bolts
|
|
| •
|
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
|
| •
|
From mechanical seals
|
| •
|
Impeller interference
|
|
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
|
|
| •
|
Check engine coolant.
|
| •
|
Poor coolant quality / Maintenance check
|
|
| •
|
Impeller seperation from the shaft
|
|
| •
|
Replace the water pump.
|
|
Hyundai Sonata: Water pump. Troubleshooting
Water pump. Repair procedures
Thermostat. Repair procedures