Kia Optima DL3 Quiz
Engine Mechanical System

Water Pump

In this manual: Engine Mechanical System
General Information — 8Advanced Driver Assistance System (ADAS) — 21Maintenance — 27Engine Mechanical System — 45Engine Electrical System — 11Emission Control System — 11Engine Control System/Fuel System — 25Automatic Transmission — 20Drive Shaft and Axle — 7Suspension System — 22Steering — 7Restraints — 11Brake System — 22Body (Interior and Exterior) — 116Body Electrical System — 90Heating, Ventilation, and Air Conditioning — 32
11steps
~66min
3/5difficulty
Done 0 of 11

Components and Component Location

Components

1. Water Pump Pulley
2. Water Pump		 3. Water Pump Gasket

Repair Procedures

Removal and Installation

  1. Drain the engine coolant.

    (Refer to Cooling System - "Engine Coolant")

  2. Remove the drive belt.

    (See Drive Belt System - Drive Belt)

  3. Remove the water pump pulley (A).

    Tightening torque: 9.8–11.8 N·m (1.0–1.2 kgf·m, 7.2–8.7 ft-lbf)

  4. Remove the water pump assembly (A) with the gasket (B).

    Tightening torque: 9.8–11.8 N·m (1.0–1.2 kgf·m, 7.2–8.7 ft-lbf)

  5. Install in the reverse order of removal.

  6. Fill the engine coolant.

    (Refer to Cooling System - "Engine Coolant")

  7. Start the engine and check for leaks.

  8. Recheck the coolant level.

Inspection

  1. Inspect each component for cracks, damage or wear, and replace the water pump assembly if necessary.

  2. Inspect the bearing for damage, abnormal noise and rough rotation, and replace the water pump assembly if necessary.

  3. Check for coolant leakage. If coolant leaks from the hole, the seal is damaged. Replace the water pump assembly.

Troubleshooting

Troubleshooting

Symptoms Possible Causes Remedy
Coolant Leakage

  • From the water pump drain hole

 Visually inspect

  • Check for leaks after warming up the engine for approximately 10 minutes.

  • If coolant continues to leak, replace the water pump.

  • If the leak stops, reuse the water pump (do not replace it with a new pump).

  • From the gaskets or bolts

  • Check the tightening torque of the water pump mounting bolts.

  • Tighten the mounting bolts.

  • Check for damage to the gasket or contamination by dust.

  • Replace the gasket and clean off any dust.

  • From the outer surface of the water pump

  • Check the water pump material and check for cracks.

  • Poor material. If any crack is found, replace the water pump.
Noise

  • From the bearings

  • From the mechanical seals

  • Impeller interference

 Inspection using a stethoscope

  • After starting the engine, check for noise with a stethoscope.

  • If there is no noise, reuse the water pump (do not replace it).

  • If there is noise from the water pump, remove the drive belt and recheck.
Inspection after drive belt removal

  • After removing the water pump and drive belt, check the noise again.

  • If there is noise, reuse the water pump. Check the other drive part line.

  • If there is no noise, replace the water pump with a new one.
Check after water pump removal

  • After removing the water pump and drive belt, check the noise again.

  • If there is any interference between them, replace the water pump with a new one.
Overheating

  • Damaged impeller

  • Loose impeller

 Loose impeller

  • Corrosion of impeller blade

  • Check the engine coolant.

  • Poor coolant quality / maintenance

  • Separation of impeller from shaft

  • Replace the water pump.

Test yourself

A quick Kia Optima DL3 quiz: every answer comes with an explanation and a link to the manual page.