Hyundai i-30: Cooling System / Water pump

Hyundai i30 (PD) 2018-2024 Service Manual / Engine Mechanical System / Cooling System / Water pump

Repair procedures
Removal and Installation
  
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.
1.
Disconnect the negative battery terminal.
2.
Drain the engine coolant.
(Refer to Cooling System - "Coolant")
3.
Remove the drive belt.
(Refer to Drive Belt System - "Drive Belt")
4.
Remove the water pump pulley (A).
Tightening torque :
24.5 - 30.4 N.m (2.5 - 3.1 kgf.m, 18.1 - 22.4 lb-ft)

5.
Remove the idler.
(Refer to Drive Belt System - "Idler")
6.
Remove the water pump (A) with the metal gasket (B).
Tightening torque :
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)

  
When installing the water pump, use a new metal gasket.
7.
Install in the reverse order of removal.
  
The coolant must be injected according to the integrated thermal management module (ITM) coolant filling method.
8.
Fill with engine coolant.
(Refer to Cooling System - "Coolant")
9.
Start the engine and check for leaks.
10.
Recheck the engine coolant level.
Water pump housing
1.
Remove the water pump.
2.
Remove the water inlet fitting pipe.
(Refer to Cooling System - "Water Inlet Fitting")
3.
Remove the alternator.
(Refer to Engine Electrical System - "Alternator")
4.
Disconnect the water temperature sensor connector (A).

5.
Disconnect the water temperature sensor (A).
Tightening torque :
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)

6.
Disconnect the heater pipe hose (A).

7.
Remove the water pump housing (A).
Tightening torque :
18.6 - 23.5 N.m (1.9 - 2.4 kgf.m, 13.7 - 17.4 lb-ft)

8.
Install in the reverse order of removal.
9.
Fill with engine coolant.
(Refer to Cooling System - "Coolant")
  
The coolant must be injected according to the integrated thermal management module (ITM) coolant filling method.
10.
Start the engine and check for leaks.
11.
Recheck the engine coolant level.
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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