Trouble Symptom
| Probable Cause
| Remedy
|
Coolant leakage
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From the bleed hole of the water pump |
| Visually check
|
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•
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Check leaks after about 10 minutes of warming up. |
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If coolant still leaks, replace a water pump. |
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•
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If leakage stops, reuse the water pump (Do not replace the pump with a new one). |
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•
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From gaskets or bolts |
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•
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Check the tightening of the water pump mounting bolts. |
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•
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Retighten the mounting bolts. |
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Check damage of gaskets or inflow of dust. |
|
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•
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Replace the gasket and clean dust off. |
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From outer surface of water pump |
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Check the material or any cracks of the water pump. |
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Material defect. If any cracks are found, replace the water pump. |
|
Noise
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•
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From mechanical seals |
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•
|
Impeller interference |
| Inspection with a stethoscope
|
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•
|
After starting the engine, check noise with a stethoscope. |
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•
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If there is no noise, reuse the water pump (do not replace it). |
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If there is any noise from the water pump, remove the drive belt and recheck. |
|
Inspection after removing the drive belt.
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•
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After removing the water pump and the drive belt, check noise again. |
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If there is noise, reuse the water pump. Check other drive line parts. |
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If there is no noise, replace the water pump with a new one. |
|
Inspection after removing the water pump
|
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•
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After removing the water pump and the drive belt, check noise again. |
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If there is any interference between them, replace the water pump with a new one. |
|
Overheating
|
| Loosened impeller
|
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•
|
Corrosion of the impeller wing |
|
|
•
|
Check engine coolant. |
|
•
|
Poor coolant quality / Maintenance check |
|
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•
|
Impeller seperated from the shaft |
|
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•
|
Replace the water pump. |
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Kia Sedona: Water pump Troubleshooting
Water pump Repair procedures
Thermostat Components and Components Location