Hyundai Sonata: Water pump. Troubleshooting - Cooling System - Engine Mechanical System - Hyundai Sonata YF 2011-2019 Service ManualHyundai Sonata: Water pump. Troubleshooting

Troubleshooting

Water Pump
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 bearings
•
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
•
Damaged impeller
•
Loosened impeller
Loosened impeller
•
Corrosion of the impeller wing
•
Check engine coolant.
•
Poor coolant quality / Maintenance check
•
Impeller seperation from the shaft
•
Replace the water pump.


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