Kia Picanto: Cooling System / Water pump

Kia Picanto JA 2017-2024 Service & Repair Manual / Engine Mechanical System / Cooling System / Water pump

Repair procedures

Removal and Installation

1.	Disconnect the negative battery terminal.

2.	Remove the engine room under cover and RH side cover. (Refer to Engine and Transaxle Assembly - “Engine Room Under Cover”)

3.	Drain the coolant. (Refer to Cooling System - "Coolant")

4.	Remove the drive belt. (Refer to Drive Belt System - “Drive Belt”)

Remove the water pump pulley (A).

Tightening torque :

12.7 - 14.7 N·m (1.3 - 1.5 kgf·m, 9.4 - 10.8 lb·ft)

6.	Remove the drive belt tensioner. (Refer to Drive Belt System - “Drive Belt Tensioner”)

Remove the water pump (A) with the gasket.

Tightening torque :

19.6 - 26.5 N·m (2.0 - 2.7 kgf·m, 14.5 - 19.5 lb·ft)

When installing the water pump, use a new gasket.

8.	Install in the reverse order of removal.

9.	Fill the radiator with coolant. (Refer to Cooling System - "Coolant")

10.	Start engine and check for leaks.

Inspection

1.	Check each part for cracks, damage or wear, and replace the coolant pump assembly if necessary.

2.	Check the bearing for damage, abnormal noise and sluggish rotation, and replace the coolant pump assembly if necessary.

Check for coolant leakage. If coolant leaks from hole, the seal is defective. Replace the coolant pump assembly and gasket.

A small amount of “weeping” from the bleed hole is normal.

Troubleshooting

Symptoms

Possible Causes

Remedy

Coolant leakage

•	From the bleed hole of the water pump

Visually check

•	Check for leakage in about 10 minutes of warming up.

•	If coolant still leaks, replace the water pump.

•	If leakage stops, reuse the water pump. (Do not replace the pump.)

•	From gaskets or bolts

•	Check the tightening of the water pump mounting bolts.

•	Retighten the mounting bolts.

•	Check for damaged gaskets or inflow of dust.

•	Replace the gasket and clean dust off.

•	From outer surface of water pump

•	Check for defective material or any cracks on the water pump.

•	Replace the water pump for defective material or any cracks found.

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 (without replacing 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

•	Loose impeller

Loosened impeller

•	Corroded impeller wing

•	Check engine coolant.

•	Poor coolant quality / Maintenance check

•	Impeller separated from the shaft

•	Replace the water pump.

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