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 separation from the shaft | Replace the water pump. | |||
Scheme 17
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Scheme 22
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Scheme 25
Scheme 26
- Disconnect the battery negative terminal. Tightening torque (-) terminal (without battery sensor): 7.8 ~ 9.8N.m (0.8 ~ 1.0kgf.m, 5.8 ~ 7.2lb-ft) (-) terminal (with battery sensor): 4.0 ~ 6.0N.m (0.4 ~ 0.6kgf.m, 3.0 ~ 4.4lb-ft)
- Remove the air cleaner assembly. (Refer to «REMOVAL AND INSTALLATION»(ref-537205-S18522908542013032200000) .
- Remove the front bumper. (Refer to «FRONT BUMPER»(ref-537203-S05751684872013032200000) )
- Disconnect the over flow hose (A).
- Loosen the drain plug and drain the coolant. Open the radiator cap to make rapid draining. WARNING: Never remove the radiator cap when the engine is hot. Serious scalding could be caused by hot fluid under high pressure escaping from the radiator.
- Disconnect the fan motor connector (A).
- Remove the radiator upper hose (A) and lower hose (B).
- Disconnect the ATF cooler hose (A).
- Remove the horn (A), intake shield cover (B), air guard (C).
- Remove the radiator upper mounting bracket (A), hood latch (B). Tightening torque: 6.9 ~ 10.8N.m (0.7 ~ 1.1kgf.m, 5.1 ~ 8.0lb-ft)
- Remove the A/C condenser from the radiator assembly and then lift up the radiator assembly (A).
- Remove the cooling fan (B) from the radiator (A).
- Installation is reverse order of removal. NOTE: Bleed air from the cooling system. Start engine and let it run until it warms up. (Until the radiator fan operates 3 or 4 times.) Turn off engine. Check the coolant level and add coolant if needed. This will allow trapped air to be removed from the cooling system. Put the radiator cap on tightly, then run engine again and check for leaks.
Scheme 27
- Remove the radiator cap, wet its seal with engine coolant, then install it to pressure tester.
- Apply a pressure of 93 ~ 123kPa (0.95 ~ 1.25kgf/cm 2 , 14 ~ 19psi).
- Check for a drop in pressure.
- If the pressure drops, replace the cap.
Scheme 28
- Wait until engine is cool, then carefully remove the radiator cap and fill the radiator with engine coolant, then install a pressure tester on it.
- Apply a pressure of 93 ~ 123kPa (0.95 ~ 1.25kgf/cm 2 , 14 ~ 19psi).
- Inspect for engine coolant leaks and a drop in pressure.
- If the pressure drops, check hoses, the radiator and the water pump for leakage. If there is no leakage, inspect the heater core, the cylinder block and the cylinder head.
- Remove the tester and reinstall the radiator cap. NOTE: Check for engine oil in coolant and/or coolant in engine oil.