Kia Optima DL3: Engine Mechanical System / Cooling System

Kia Optima DL3 2019-2025 Service and Repair Manual / Engine Mechanical System / Cooling System

Troubleshooting

Engine Overheat Troubleshooting

Inspection
Remedy
Visual inspection
Inspect for shortage of coolant in reservoir tank .
Reinspect after replenishing coolant.
Inspect for coolant pollution after removing reservoir tank cap.
  

Be careful when removing reservoir tank cap from overheated vehicle.

Reinspect after replacing coolant.
Inspect for leakage and loose coolant hoses (radiator hose, heater hose, oil cooler hose, etc.).
Reinspect for leakage after reinstalling hoses and clamps.
Inspect for leakage on water inlet fitting mounting part.
Reinspect for leakage after replacing O-ring.
Reinspect for leakage after tightening to the specified torque.
Inspect drive belt (for normal operation of water pump).
Adjust drive belt tension or replace.
Inspect for leakage on water pump gasket mounting part.
Reinspect for leakage after replacing gasket.
Reinspect for leakage after tightening to the specified torque.
Inspect for loose coolant temperature sensor, cooling fan connector and pin.
Reinstall loose connector.
Replace relevant part if connector pin is damaged.
Inspect operation status of cooling fan.
- Check operation status by switching ON/OFF the heater control A/C.
  

Will not operate in cold ambient temperature.

Check mounting status of ground cable.
Diagnostic device
Inspect self-diagnostic code using KDS.
Check coolant temperature sensor, wiring, connector, etc.
Unit inspection
Inspect water pump impeller.
Replace water pump.
Inspect for foreign materials and status of thermostat valve.
Inspect unit after removing foreign materials.
Inspect for stuck thermostat valve.
- Immerse thermostat in water heated to over 95°C (203°F), then heat for at least 3 minutes to check valve lift.
  
•

Do not use water below 95°C (203°F).

•

Do not directly heat unit as this will damage thermostat.

Check valve lift.
- Replace thermostat if valve lift is below specification or valve is stuck.

Special service tools Special Service Tools Tool Name / Number Illustration Description Crankshaft front oil seal installer 09231-2E000 Used for installing crankshaft front oil seal Crankshaft rear oil seal installer 09214-2E000 (Installer) 09231-H1100 (Handle) Used for installing crankshaft rear oil seal Valve spring compressor & holder 09222-3K000 (Compressor) 09222-3K100 (Handle) Used for removing / installing intake or exhaust valve Valve stem seal installer 09222-2E000 Used for installing valve stem seal Ring gear stopper 09231-3N100 09231-2B100 Used for keeping ring gear from rotating when removing / installing crankshaft pulley bolt Ring gear stopper 09231-3D100 09231-2W100 Used for keeping ring gear from rotating when removing / installing crankshaft pulley bolt Oil pan remover 09215-3C000 Used for removing oil pan Tensioner stopper pin 09240-2E100 Used for holding compressed piston of tensioner Oil filter wrench 09263-2E000 Used for removing / installing oil filter Steel ball installer 0K221-2M100 Used for installing steel ball Pressure cap pressure checker 0K253-G5100 Used for checking for pressure cap pressure and a coolant leak Compression test Compression Pressure Inspection    If the there is lack of power, excessive oil consumption or poor fuel economy, measure the compression pressure.

Repair procedures Refilling And Bleeding    Never remove the reservoir tank cap when the engine is hot.

Other information:

Kia Optima DL3 2019-2025 Service and Repair Manual: Compressor oil

Repair procedures Oil Specification 1. The HFC-134a system requires synthetic (PAG) compressor oil whereas the R-12 system requires mineral compressor oil. The two oils must never be mixed. 2. Compressor (PAG) oil varies according to compressor model.

Kia Optima DL3 2019-2025 Service and Repair Manual: Cluster Ionizer

Components and components location Components Location 1. Condenser Description and operation Description The cluster ionizer makes disinfection and decomposition of bad smell from the air-conditioner or inflow air.

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