| SONATA(YF) >2012 > G 2.4 GDI > Engine Mechanical System > Cooling System > Radiator>Repair procedures |

Removal and Installation

1. | Disconnect the battery terminals. (Refer to Engine and transaxle assembly in this group)

2. | Remove the air cleaner assembly. (Refer to Engine and transaxle assembly in this group)

3. | Remove the battery and battery tray. (Refer to Engine and transaxle assembly in this group)

4. | Remove the under cover. (Refer to Engine and transaxle assembly in this group)

5. | Loosen the drain plug, and drain the engine coolant. Remove the radiator cap to drain with speed.

6. | Disconnect the radiator upper hose (A), lower hose (B) and then disconnect the fan motor connector (C).

7. | Disconnect the ATF cooler hoses (A/T only). (Refer to AT group)

8. | Disconnect the over flow hose (A) from the radiator.

9. | Remove the cooling fan assembly (A).

Tightening torque :
4.9 ~ 7.8 N.m (0.5 ~ 0.8 kgf.m, 3.6 ~ 5.8 lb-ft)

10. | Remove the radiator mounting bracket (A).

Tightening torque:
3.9 ~ 5.9 N.m (0.4 ~ 0.6 kgf.m, 2.9 ~ 4.3 lb-ft)

11. | Separate the condenser from the radiator and then remove the radiator assembly (A).

12. | Installation is the reverse order of removal.

13. | Fill the radiator with coolant and check for leaks.

• | Bleed air from the cooling system.

- | Start engine and let it run until it warms up. (Until the radiator fan operates 3 or 4 times.)

- | Turn off engine. Check the coolant level and add coolant if needed. This will allow trapped air to be removed from the cooling system.

- | Put the radiator cap on tightly, then run engine again and check for leaks.

Inspection

Radiator Cap Testing

1. | Remove the radiator cap, wet its seal with engine coolant, and then install it on a pressure tester.

2. | Apply a pressure of 93.16 ~ 122.58 kPa (0.95 ~ 1.25 kgf/cm², 13.51 ~ 17.78 psi).

3. | Check for a drop in pressure.

4. | If the pressure drops, replace the cap.

Radiator Leakage Test

1. | Wait until engine is cool, then carefully remove the radiator cap and fill the radiator 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 ~ 122.58kPa (0.95 ~ 1.25kgf/cm², 13.51 ~ 17.78psi).

3. | Inspect for engine coolant leaks and a drop in pressure.

4. | Remove the tester and reinstall the radiator cap.

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