Kia Optima: Maintenance / Engine coolant

Kia Optima DL3 2019-2021 Owner's Manual / Maintenance / Engine coolant

The high-pressure cooling system has a reservoir filled with year round antifreeze coolant. The reservoir is filled at the factory.

Check the antifreeze protection and coolant level at least once a year: at the beginning of the winter season, and before traveling to a colder climate.

Engine oil
Checking the engine oil level ■ THETA 2.4L - GDI 1. Be sure the vehicle is on level ground. 2. Start the engine and allow it to reach normal operating temperature. 3. Turn the engine off and w ...

Checking the coolant level
WARNING Removing radiator cap Never attempt to remove the radiator cap while the engine is operating or hot. Doing so might lead to cooling system and engine damage and could result in serious ...

Other information:

Kia Optima DL3 2019-2021 Service and Repair Manual: Engine Coolant Temperature Sensor (ECTS)


Specifications Specification Temperature Resistance (kΩ) °C °F 45 113 244.8 - 281.4 55 131 162.5 - 186.5 60 140 ...

Kia Optima DL3 2019-2021 Service and Repair Manual: Side Sill Molding


Repair procedures Replacement    Put on gloves to prevent hand injuries.    • When removing with a flat-tip screwdriv ...

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