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

REMOVAL

Scheme 15

Scheme 16

Scheme 17

Scheme 18

Scheme 19

Scheme 20

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. Drain the engine coolant. Refer to «DRAINING OF ENGINE COOLANT»(ref-357080-S30342819572010030800000) , REPLACEMENT, Engine Coolant.
6. Disconnect the connectors of main fan motor connector (A) and sub fan motor connector (B).
7. Disconnect the radiator outlet hose from thermostat cover.
8. Lower the vehicle.
9. Remove the air intake duct. Refer to «REMOVAL»(ref-357076-S39226648372010030800000) , Air Intake Duct.
10. Remove the reservoir tank. Refer to «REMOVAL»(ref-357080-S15687655382010030800000) , Reservoir Tank.
11. Disconnect the radiator inlet hose (A) from the radiator.
12. Disconnect the two coolant filler tank hoses from the radiator.
13. Remove the radiator upper brackets.
14. Move the radiator to the left while lifting it upward.
15. Lift the radiator up and remove the radiator from vehicle.

Scheme 21

1. Attach the radiator lower cushion to 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. Tightening torque: 12 N.m (1.2 kgf-m, 8.9 ft-lb)
4. Connect the two coolant filler tank hoses to the radiator.
5. Connect the radiator inlet hose (A).
6. Install the reservoir tank. Refer to «INSTALLATION»(ref-357080-S07545699702010030800000) , Reservoir Tank.
7. Install the air intake duct. Refer to «INSTALLATION»(ref-357076-S03008514172010030800000) , Air Intake Duct.
8. Lift up the vehicle.
9. Connect the radiator outlet hose.
10. Connect the connectors of main fan motor connector (A) and sub fan motor connector (B).
11. Install the under cover.
12. Lower the vehicle.
13. Connect the ground cable to battery.
14. Fill engine coolant. Refer to «FILLING OF ENGINE COOLANT»(ref-357080-S19402554772010030800000) , REPLACEMENT, Engine Coolant.

Scheme 22

1. Remove the coolant filler tank cap, fill the coolant filler tank with engine coolant, then install the radiator cap tester to the filler neck of coolant filler tank.
2. Apply a pressure of 122 kPa (1.2 kg/cm 2 , 18 psi) to the radiator and check the following points: Leakage from the radiator or its vicinity Leakage from the hose or its connections CAUTION: Inspection must be carried out at the side of coolant filler tank, not at the side of radiator. Engine should be turned off. Wipe engine coolant from check points in advance. Be careful of the spurt of engine coolant when removing the radiator cap tester. Be careful not to deform the filler neck of the coolant filler tank when installing and removing the radiator cap tester.

Scheme 23

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. Coolant filler tank side Specification: 93 - 123 kPa (0.95 - 1.25 kg/cm 2 , 14 - 18 psi) Service limit: 83 kPa (0.85 kg/cm 2 , 12 psi) Radiator side Specification: 122 - 152 kPa (1.24 - 1.55 kg/cm 2 , 18 - 22 psi) Service limit: 112 kPa (1.14 kg/cm 2 , 16 psi) CAUTION: Be sure to remove foreign matter and rust from the cap in advance. Otherwise, results of pressure test will be incorrect. Do not confuse the cap of coolant filler tank and cap of radiator.

Scheme 24

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 main fan motor connector (A).
6. Lower the vehicle.
7. Remove the air intake duct. Refer to «REMOVAL»(ref-357076-S39226648372010030800000) , Air Intake Duct.
8. Remove the reservoir tank. Refer to «REMOVAL»(ref-357080-S15687655382010030800000) , Reservoir Tank.
9. Remove the bolts which secure the radiator main fan motor assembly and the over flow pipe.
10. Remove the radiator main fan motor assembly from the upper side of the vehicle.

INSTALLATION

Install in the reverse order of removal.

Tightening torque

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

Scheme 25

Scheme 26

1. Remove the clip which holds the main fan motor connector onto the radiator main fan shroud.
2. Disconnect the radiator main fan from the main fan motor.
3. Disconnect the main fan motor from the radiator main fan shroud.

Install in the reverse order of removal.

Tightening torque

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

Scheme 27

1. Remove the clip which holds the sub fan motor connector onto the radiator sub fan shroud.
2. Disconnect the radiator sub fan from the sub fan motor.
3. Disconnect the sub fan motor from the radiator sub fan shroud.

Install in the reverse order of removal.

Scheme 28

1. Drain approximately 3.0 l (3.2 US qt, 2.6 lmp qt) of engine coolant. Refer to «DRAINING OF ENGINE COOLANT»(ref-357080-S30342819572010030800000) , REPLACEMENT, Engine Coolant.
2. Disconnect the engine coolant hoses from coolant filler tank.
3. Remove the bolts which secure the coolant filler tank.
4. Remove the coolant filler tank.

Scheme 29

1. Install in the reverse order of removal. Tightening torque: 16 N.m (1.6 kgf-m, 11.8 ft-lb)