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

REPLACEMENT

Scheme 21

Scheme 22

1. Set the vehicle on a lift.
2. Open the engine oil filler cap for quick draining of engine oil.
3. Lift up the vehicle.
4. Drain engine oil by loosening the engine oil drain plug. NOTE: Prepare the container for draining of engine oil.
5. Tighten the engine oil drain plug after draining engine oil. NOTE: Use a new drain plug gasket. Tightening torque: 44 N.m (4.5 kgf-m, 32.5 ft-lb)
6. Lower the vehicle.
7. Using engine oil of proper quality and viscosity, fill engine oil through the filler duct to the "P" line on the oil level gauge. Make sure that the vehicle is parked on a level surface when checking oil level. Recommended oil: Refer to "SPECIFICATION" for recommended oil. Ref. to «SPECIFICATION»(ref-357094-S30507115082010030800000) , General Description. Engine oil capacity: Refer to "SPECIFICATION" for engine oil capacity. Ref. to «SPECIFICATION»(ref-357094-S30507115082010030800000) , General Description.
8. Close the engine oil filler cap.
9. Start the engine, and spread the oil in engine room.
10. After stopping the engine, recheck the oil level. If necessary, add engine oil up to the "P line on oil level gauge.

Scheme 23

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Scheme 26

1. Set the vehicle on a lift.
2. Disconnect the ground cable from battery.
3. Remove the radiator. Ref. to «REMOVAL»(ref-357080-S24531260732010030800000) , Radiator.
4. Lift up the vehicle.
5. Remove the bolt (B) which secures oil cooler pipe (A) to oil pump.
6. Remove the oil cooler pipe (A) and hose (C).
7. Lower the vehicle.
8. Remove the crankshaft position sensor. Ref. to «REMOVAL»(ref-357081-S01527024842010030800000) , Crankshaft Position Sensor.
9. Remove the water pump. Ref. to «REMOVAL»(ref-357080-S16649019732010030800000) , Water Pump.
10. Remove the crank sprocket. Ref. to «REMOVAL»(ref-357079-S06739915842010030800000) , Crank Sprocket.
11. Remove the bolts which install oil pump onto cylinder block. NOTE: When disassembling and checking the oil pump, loosen the relief valve plug before removing the oil pump.
12. Remove the oil pump by using flat tip screwdriver. CAUTION: Be careful not to scratch mating surfaces of cylinder block and oil pump.
13. Remove the front oil seal from the oil pump.

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Scheme 30

1. Using the ST, install the front oil seal. ST 499587100 OIL SEAL INSTALLER NOTE: Use a new front oil seal.
2. Apply liquid gasket to the mating surfaces of oil pump. NOTE: Install within 5 min. after applying liquid gasket. Liquid gasket: THREE BOND 1217G (Part No. K0877Y0100) or equivalent
3. Apply a coat of engine oil to the inside of front oil seal.
4. Install the oil pump to cylinder block. Be careful not to damage the front oil seal during installation. NOTE: Make sure the front oil seal lip is not folded. Align the flat surface of oil pump's inner rotor with crankshaft before installation. Use new O-rings. Do not forget to install O-rings.
5. Apply liquid gasket to the three bolts thread shown in figure, (when reusing bolts) Liquid gasket: THREE BOND 1324 (Part No. 004403042) or equivalent Tightening torque: 6.4 N.m (0.7 kgf-m, 4.7 ft-lb)
6. Install the crank sprocket. Ref. to «INSTALLATION»(ref-357079-S32349496812010030800000) , Crank Sprocket.
7. Install the water pump. Ref. to «INSTALLATION»(ref-357080-S07552851942010030800000) , Water Pump.
8. Install the crankshaft position sensor. Ref. to «INSTALLATION»(ref-357081-S42181900052010030800000) , Crankshaft Position Sensor.
9. Lift up the vehicle.
10. Install oil cooler pipe (A) and hose (C).
11. Install the oil cooler pipe (A) to oil pump using the bolts (B). Tightening torque: 6.4 N.m (0.7 kgf-m, 4.7 ft-lb)
12. Lower the vehicle.
13. Install the radiator. Ref. to «INSTALLATION»(ref-357080-S12847411072010030800000) , Radiator.
14. Connect the ground cable to battery.

INSTALLATION

Note. Before installing the oil pan, clean the mating surface of oil pan and engine block.

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Scheme 34

1. Make sure that the seals (A) are installed securely on the baffle plate in a direction as shown in the figure below. NOTE: Use a new seal.
2. Install the baffle plate. Tightening torque: 6.4 N.m (0.7 kgf-m, 4.7 ft-lb)
3. Install the oil strainer to cylinder block. NOTE: Use new O-rings. Tightening torque: 10 N.m (1.0 kgf-m, 7.4 ft-lb)
4. Tighten the oil strainer stay together with the baffle plate. Tightening torque: 6.4 N.m (0.7 kgf-m, 4.7 ft-lb)
5. Apply liquid gasket to the mating surfaces of oil pan, and install the oil pan. NOTE: Use a new gasket. Install within 5 min. after applying liquid gasket. Liquid gasket: THREE BOND 1217G (Part No. K0877Y0100) or equivalent
6. Tighten the bolts which install oil pan to cylinder block. Tightening torque: T1: 5 N.m (0.5 kgf-m, 3.7 ft-lb) T2: 6.4 N.m (0.7 kgf-m, 4.7 ft-lb) T3: 10 N.m (1.0 kgf-m, 7.4 ft-lb)
7. Lower the engine onto front crossmember.
8. Install the nuts which hold the engine mounting to the front crossmember. Tightening torque: 85 N.m (8.7 kgf-m, 62.7 ft-lb)
9. Install the front exhaust pipe. Ref. to «INSTALLATION»(ref-357090-S25927101752010030800000) , Front Exhaust Pipe.
10. Install the under cover.
11. Lower the vehicle. CAUTION: When lowering the vehicle, lower the lift up device and wire ropes at the same time.
12. Remove the lifting device and wire ropes.
13. Install the pitching stopper. Tightening torque: T1: 50 N.m (5.1 kgf-m, 36.9 ft-lb) T2: 58 N.m (5.9 kgf-m, 42.8 ft-lb)
14. Install the radiator upper brackets. Tightening torque: 12 N.m (1.2 kgf-m, 8.9 ft-lb)
15. Install the intercooler. Ref. to «INSTALLATION»(ref-357076-S13206454512010030800000) , Intercooler.
16. Install the air intake boot.
17. Install the air intake duct. Ref. to «INSTALLATION»(ref-357076-S03008514172010030800000) , Air Intake Duct.
18. Connect the ground cable to battery.
19. Refill the engine oil. Ref. to , «INSPECTION»(ref-357094-S11339677942010030800000) , Engine Oil.

REMOVAL

Scheme 35

1. Set the vehicle on a lift.
2. Lift up the vehicle.
3. Remove the under cover.
4. Drain engine coolant. Ref. to «DRAINING OF ENGINE COOLANT»(ref-357080-S30342819572010030800000) , REPLACEMENT, Engine Coolant.
5. Remove the engine oil filter. Ref. to , «REMOVAL»(ref-357094-S36214416262010030800000) , Engine Oil Filter.
6. Remove the bolt (B) holding the oil cooler pipe (A) to the oil pump.
7. Remove the oil cooler pipe (A) and oil cooler hose (C).
8. Remove the oil cooler connector (D) and oil cooler (E).

Install in the reverse order of removal.

Note. Use a new gasket.

Tightening torque

T1: 6.4 N.m (0.7 kgf-m, 4.7 ft-lb)

T2: 54 N.m (5.5 kgf-m, 39.8 ft-lb)

Scheme 36

Scheme 37

1. Set the vehicle on a lift.
2. Lift up the vehicle.
3. Remove the under cover.
4. Remove the oil filter (A). Oil filter (Black) Remove using the ST. ST 18332AA000 OIL FILTER WRENCH (outer diameter: 68 mm (2.68 in) for oil filter) Oil filter (Blue) Remove using a general tool (65/67 mm 14 Flutes).

1. Clean the oil filter installation surface of the oil cooler.
2. Obtain a new oil filter and apply a thin coat of engine oil to the seal rubber.
3. Install the oil filter turning it by hand, being careful not to damage the seal rubber of the oil filter. Tighten the oil filter (Black) with an outer diameter of 68 mm (2.68 in) (approx. 1 rotation) after the seal rubber of the oil filter comes in contact with oil cooler. When using a torque wrench, tighten to 14 N.m (1.4 kgf-m, 10.3 ft-lb). Tighten the oil filter (Blue) with an outer diameter of 67.4 mm (2.65 in) (approx. 7/8 rotation) after the seal rubber of the oil filter comes in contact with oil cooler. When using a torque wrench, tighten to 12 N.m (1.2 kgf-m, 8.9 ft-lb).
4. Install the under cover.
5. Lower the vehicle.