Kia Niro: Cooling System / Radiator Repair procedures

Removal and Installation
1.

Disconnect the negative battery terminal.

2.

Remove the air cleaner.

(Refer to Intake and Exhaust System - "Air Cleaner")

3.

Remove the engine room under cover.

(Refer to Engine and Transaxle Assembly - "Engine Room Under Cover")

4.

Drain the coolant.

(Refer to Cooling System - "Coolant")

5.

Remove the cooling fan assembly.

(Refer to Cooling System - "Cooling Fan")

6.

Disconnect the radiator upper hose (A) from the radiator.

7.

Disconnect the radiator lower hose (A) from the radiator.

8.

Disconnect the radiator reservoir hose (A).

9.

Separate the A/C pipe (A) from the radiator.

Tightening torque :

4.9 - 8.3 N·m (0.5 - 0.8 kgf·m, 3.6 - 6.1 lb·ft)

10.

Remove the radiator upper mounting bracket (A).

Tightening torque :

7.8 - 11.8 N·m (0.8 - 1.2 kgf·m, 5.8 - 8.7 lb·ft)

11.

Remove the radiator upper mounting bolt (A).

Tightening torque :

4.9 - 8.3 N·m (0.5 - 0.8 kgf·m, 3.6 - 6.1 lb·ft)

[RH]

[LH]

12.

Remove the radiator lower mounting bolt (A).

Tightening torque :

4.9 - 8.3 N·m (0.5 - 0.8 kgf·m, 3.6 - 6.1 lb·ft)

[RH]

[LH]

13.

Remove the inverter radiator lower pipe (A) from the radiator.

Tightening torque :

7.8 - 11.8 N·m (0.8 - 1.2 kgf·m, 5.8 - 8.7 lb·ft)

14.

Remove the radiator (A).

15.

Install in the reverse order of removal.

16.

Fill the radiator with coolant and check for leaks.

Inspection

Pressure Cap Testing

1.

Install the pressure cap and pressure tester on a SST (0K253-G5100).

2.

Apply a pressure of 79.4 - 122.58 kPa (0.95 - 1.25 kgf/cm², 11.5 - 17.78 psi).

3.

Check for a drop in pressure.

4.

If the pressure drops, replace the pressure cap.

Radiator Leakage Test

1.

Wait until engine is cool, then carefully remove the pressure cap and fill the reservoir tank with engine coolant, then install it on the pressure tester.

2.

Apply a pressure tester to the radiator and apply a pressure of 93.16 - 122.58 kPa (0.95 - 1.25 kgf/cm², 13.51 - 17.78 psi).

3.

Inspect for engine coolant leaks and a drop in pressure.

4.

Remove the tester and reinstall the pressure cap.

  

Check for engine oil in coolant and/or coolant in engine oil.

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