| SONATA(YF) >2013 > G 2.4 GDI > Engine Mechanical System > Cooling System > 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.