Water pump: Troubleshooting

WARNING: This page is about a different car, the 2013 Hyundai Elantra GT. However, it is still accessible from the selected car via links, so may be relevant.

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.
	From the bleed hole of the water pump		Check leaks after about ten-minute warming up.	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.
	From gaskets or 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).
		Inspection with a stethoscope	After starting the engine, check noise with a stethoscope.	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.
		Inspection after removing a drive belt		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
Overheating	Damaged impeller Loosened impeller	Loosened impeller	Impeller separation from the shaft	Replace the water pump.