Kia Optima: Maintenance / Engine coolant

Kia Optima DL3 2019-2023 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 2019-2023 Owner's Manual: Selecting a Child Restraint System (CRS)

When selecting a CRS for your child, always: Make sure the CRS has a label certifying that it meets applicable Safety Standards of your country. Select a child restraint based on your child’s height and weight. The required label or the instructions for use typically provide this infor ...

Kia Optima DL3 2019-2023 Service and Repair Manual: Oil Pressure Switch

Repair procedures Removal and Installation 1. Disconnect the oil pressure switch connector (A) and then remove the oil pressure switch (B). Tightening torque : 9.8 - 11.8 N•m (1.0 - 1.2 kgf•m, 7.2 - 8.7 lb•ft) ...