Cooling System - 2.7L: Maintenance Kia Optima II рестайлинг

Engine Coolant Refilling And Bleeding

1. Make sure the engine and radiator are cool to the touch.
2. Open the radiator cap.
3. Loosen the drain plug, and drain the coolant.
4. Tighten the radiator drain plug securely.
5. Remove, drain and clean the reservoir tank.
6. Fill water slowly through the radiator cap. Push the upper/lower hoses of the radiator so as to bleed air easily.
7. Warm the engine until the cooling fan operates 2~3 times. Accelerate the engine 2~3 times without load.
8. Wait until the engine is cold.
9. Repeat the steps 1 ~ 8 until the water drained is clean.
10. Fill fluid mixture with coolant and water (4: 6) slowly through the radiator cap. Push the upper/lower hoses of the radiator so as to bleed air easily.
11. Start the engine and run so coolant circulates. When the cooling fan operates and coolant circulates, refill coolant through the radiator cap.
12. Repeat 11 until the cooling fan cycles 3 ~ 5 times and bleed air sufficiently out of the cooling system.
13. Install the radiator cap and fill the reservoir tank to the "MAX" (or "F") line with coolant.
14. Run the vehicle under idle until the cooling fan operates 2 ~ 3 times.
15. Stop the engine and wait until coolant gets cool.
16. Repeat 10 to 15 until the coolant level doesn't fall any more, bleeding air out of the cooling system. NOTE: Check the coolant level again in the reservoir tank for 2 ~ 3 days after replacing coolant.

Scheme 35

1. Remove the radiator cap, wet its seal with engine coolant, and install it to a pressure tester.
2. Apply a pressure of 93 ~ 123kPa (0.95 ~ 1.25kgf/cm 2 , 14 ~ 19 psi).
3. Check for a drop in pressure.
4. If the pressure drops, replace the cap.

Scheme 36

1. Wait until engine is cool, then carefully remove the radiator cap. Fill the radiator with engine coolant and install a pressure tester on it.
2. Apply a pressure of 93 ~ 123kPa (0.95 ~ 1.25kgf/cm 2 14 ~18psi).
3. Inspect for engine coolant leaks and a drop in pressure.
4. Remove the tester and reinstall the radiator cap. NOTE: Check for engine oil in coolant or coolant in engine oil.

Scheme 37

Scheme 38

1. Drain the engine coolant. WARNING: System is under high pressure when the engine is hot. To avoid danger of releasing scalding engine coolant, remove the cap only when the engine is cool.
2. Remove drive belt (A).
3. Remove the timing belt.
4. Remove the water pump (A) and gasket (B). CAUTION: Do not reuse the water pump gasket disassembled.

Scheme 39

Scheme 40

Scheme 41

1. Drain the engine coolant.
2. Remove the air cleaner assembly.
3. Disconnect the radiator upper and lower hose (A, B).
4. Disconnect the ECT (Engine Coolant Temperature) sensor connector.
5. Remove the coolant hose related to the heater hoses and the ECT (Engine Coolant Temperature) system.
6. Remove wiring protector.
7. Remove water temperature control assembly (A) and the gaskets (B).
8. Remove the water pipe (A).