Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2005 Kia Optima L4-2.4LFACTORY OEM SERVICE PROCEDURE
Engine Oil: Service and Repair
CHANGING ENGINE OIL
1. Run the engine until it reaches normal operating temperature.
2. Stop the engine.
3. Remove the oil filler cap (on rocker cover) and the drain plug (on the oil pan). Drain the engine oil.
4. Re-install and tighten the drain plug to the specified torque.
Tightening torque Drain plug 35 - 45 Nm (350 - 450 kg.cm, 25 - 33 ft. lbs.)
5. Fill the crankcase with new engine oil through the oil filler cap opening.
Capacity: Drain and refill
Without oil filter 4.0 lit (4.23 U.S. qts., 3.51 Imp. qts.)
With oil filter 4.3 lit (4.5 U.S. qts., 3.8 Imp. qts.)
CAUTION: Do not overfill the crankcase. This will cause oil aeration and loss of oil pressure.
6. Install the oil filler cap.
7. Start and run the engine.
8. Stop the engine and then check the oil level. Add oil if necessary.
1. Run the engine until it reaches normal operating temperature.
2. Stop the engine.
3. Remove the oil filler cap (on rocker cover) and the drain plug (on the oil pan). Drain the engine oil.
4. Re-install and tighten the drain plug to the specified torque.
Tightening torque Drain plug 35 - 45 Nm (350 - 450 kg.cm, 25 - 33 ft. lbs.)
5. Fill the crankcase with new engine oil through the oil filler cap opening.
Capacity: Drain and refill
Without oil filter 4.0 lit (4.23 U.S. qts., 3.51 Imp. qts.)
With oil filter 4.3 lit (4.5 U.S. qts., 3.8 Imp. qts.)
CAUTION: Do not overfill the crankcase. This will cause oil aeration and loss of oil pressure.
6. Install the oil filler cap.
7. Start and run the engine.
8. Stop the engine and then check the oil level. Add oil if necessary.
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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