Engine Cooling System (H4SO) (Except Sti): Removal & Installation Subaru Impreza GH

REMOVAL

Scheme 50

Scheme 51

Scheme 52

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Scheme 56

1. Set the vehicle on a lift.
2. Disconnect the ground cable from battery.
3. Lift up the vehicle.
4. Remove the under cover.
5. Remove the heat shield cover from radiator. (AT model)
6. Drain the engine coolant. Refer to «DRAINING OF ENGINE COOLANT»(ref-357238-S07262314672010031100000) , REPLACEMENT, Engine Coolant .
7. Disconnect the main fan motor assembly connector (A) and sub fan motor assembly connector (B).
8. Disconnect the radiator outlet hose from thermostat cover.
9. Disconnect the ATF cooler hoses from ATF pipes. (AT model) NOTE: Plug the ATF pipe to prevent ATF from leaking.
10. Lower the vehicle.
11. Disconnect the over flow hose.
12. Remove the reservoir tank. Refer to «REMOVAL»(ref-357238-S20846628722010031100000) , Reservoir Tank .
13. Remove the air intake duct. Refer to «REMOVAL»(ref-357233-S32244127582010031100000) , Air Intake Duct .
14. Disconnect the radiator inlet hose from engine.
15. Remove the radiator upper brackets.
16. Lift the radiator up and remove the radiator from vehicle.

Scheme 57

Scheme 58

1. Attach the radiator lower cushion to the hole on the radiator lower bracket.
2. Install the radiator to vehicle. NOTE: Make pins on the lower side of radiator be fitted into the radiator lower cushions.
3. Install the radiator upper brackets and tighten the bolts. Tightening torque: 12 N.m (1.2 kgf-m, 8.9 ft-lb)
4. Connect the radiator inlet hose.
5. Install the air intake duct. Refer to «INSTALLATION»(ref-357233-S04808498492010031100000) , Air Intake Duct .
6. Install the reservoir tank. Refer to «INSTALLATION»(ref-357238-S42898301462010031100000) , Reservoir Tank .
7. Connect the over flow hose.
8. Lift up the vehicle.
9. Connect the ATF cooler hoses. (AT model)
10. Connect the radiator outlet hose.
11. Connect the main fan motor assembly connector (A) and sub fan motor assembly connector (B).
12. Install the heat shield cover. (AT model) Tightening torque: 3 N.m (0.3 kgf-m, 2.2 ft-lb)
13. Install the under cover.
14. Lower the vehicle.
15. Connect the ground cable to battery.
16. Fill engine coolant. Refer to «FILLING OF ENGINE COOLANT»(ref-357238-S17669780692010031100000) , REPLACEMENT, Engine Coolant .
17. Check the ATF level. (AT model) Refer to «INSPECTION»(ref-357244-S25560399872010031100000) , Automatic Transmission Fluid .

Scheme 59

1. Remove the radiator cap, fill the radiator with engine coolant, and then install the tester to the installation position of cap.
2. Apply a pressure of 157 kPa (1.6 kg/cm 2 , 23 psi) to the radiator and check the following points: Leakage from the radiator or its vicinity Leakage from the hose or its connections CAUTION: Engine should be turned off. Wipe engine coolant from check points in advance. Be careful of engine coolant from spurting out when removing the tester. Be careful not to deform the filler neck of radiator when installing and removing the tester.

Scheme 60

1. Attach the radiator cap tester to radiator cap.
2. Increase pressure until the radiator cap tester gauge pointer stops. Radiator cap is functioning properly if it holds the service limit pressure for 5 - 6 seconds. Replace the cap if it is opened under a pressure less than the service limit value.

Standard

93 - 123 kPa (0.95 - 1.25 kg/cm 2 , 14 - 18 psi)

Service limit: 83 kPa (0.85 kg/cm 2 , 12 psi)

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Scheme 62

1. Set the vehicle on a lift.
2. Disconnect the ground cable from battery.
3. Lift up the vehicle.
4. Remove the under cover.
5. Disconnect the connector (A) of the main fan motor assembly.
6. Remove the heat shield cover. (AT model)
7. Remove the ATF hose from the clip of the radiator main fan shroud. (AT model)
8. Lower the vehicle.
9. Drain approximately 2.0 l of coolant. Refer to «DRAINING OF ENGINE COOLANT»(ref-357238-S07262314672010031100000) , REPLACEMENT, Engine Coolant .
10. Disconnect the radiator inlet hose from engine side.
11. Disconnect the over flow hose.
12. Remove the reservoir tank. Refer to «REMOVAL»(ref-357238-S20846628722010031100000) , Reservoir Tank .
13. Remove the bolts which hold the radiator main fan shroud onto the radiator.
14. Remove the radiator main fan and fan motor.

INSTALLATION

Install in the reverse order of removal.

Note. If the installation of the radiator main fan and fan motor is difficult, attempt installation after loosening the bolts which hold the radiator sub fan shroud to the radiator.

Tightening torque

7.5 N.m (0.8 kgf-m, 5.5 ft-lb)

Tightening torque

3 N.m (0.3 kgf-m, 2.2 ft-lb)

Install in the reverse order of removal.

Tightening torque

7.5 N.m (0.8 kgf-m, 5.5 ft-lb)

Tightening torque

3 N.m (0.3 kgf-m, 2.2 lb)

1. Disconnect the over flow hose connected to the radiator filler neck.
2. Push in the hook (A), and pull the reserve tank in the direction of the arrow to remove.

Scheme 63

Install in the reverse order of removal.