Hyundai Sonata: Water pump. Troubleshooting - Cooling System - Engine Mechanical System - Hyundai Sonata YF 2011-2018 Service ManualHyundai Sonata: Water pump. Troubleshooting

Troubleshooting

Water Pump
Symptoms
Possible Causes
Remedy
Coolant leakage
Х
From the bleed hole of the water pump
Visually check
Х
Check leaks after about ten-minute warming up.
Х
If coolant still leaks, replace a water pump.
Х
If leakage stops, reuse the water pump (Do not replace the pump with a new one).
Х
From gaskets or bolts
Х
Check the tightening of the water pump mounting bolts.
Х
Retighten the mounting bolts.
Х
Check damage of gaskets or inflow of dust.
Х
Replace the gasket and clean dust off.
Х
From outer surface of water pump
Х
Check the material or any cracks of the water pump.
Х
Poor material. If any crack found, replace the water pump.
Noise
Х
From bearings
Х
From mechanical seals
Х
Impeller interference
Inspection with a stethoscope
Х
After starting the engine, check noise with a stethoscope.
Х
If there is no noise, reuse the water pump (do not replace it).
Х
If there is any noise from the water pump, remove the drive belt and recheck.
Inspection after removing a drive belt
Х
After removing a water pump and a drive belt, check noise again.
Х
If there is noise, reuse the water pump. Check other drive line parts.
Х
If there is no noise, replace the water pump with a new one.
Inspection after removing a water pump
Х
After removing a water pump and a drive belt, check noise again.
Х
If there is any interference between them, replace the water pump with a new one.
Overheating
Х
Damaged impeller
Х
Loosened impeller
Loosened impeller
Х
Corrosion of the impeller wing
Х
Check engine coolant.
Х
Poor coolant quality / Maintenance check
Х
Impeller seperation from the shaft
Х
Replace the water pump.


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