Kia Optima: Maintenance / Engine coolant

Kia Optima DL3 2019-2025 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.

Checking the coolant level

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 2019-2025 Owner's Manual: Folding the rear seat

The rear seatbacks may be folded to facilitate carrying long items or to increase the luggage capacity of the vehicle. WARNING - Folded Seatback The purpose of the fold-down rear seatbacks is to allow you to carry longer objects that could not otherwise be accommodated. Never allow a passe ...

Kia Optima DL3 2019-2025 Service and Repair Manual: Water Temperature Control Assembly

Components and components location Components 1. Water temperature control assembly 2. Engine coolant temperature sensor 3. Throttle body coolant hose Repair procedures Removal and Installation 1. Remove the engin ...