Engine Lubrication Sysyem Subaru Impreza WRX GD/GG рестайлинг

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CAUTION

1. Wear working clothing, including a cap, protective goggles, and protective shoes during operation.
2. Remove contamination including dirt and corrosion before removal, installation or disassembly.
3. Keep the disassembled parts in order and protect them from dust or dirt.
4. Before removal, installation or disassembly, be sure to clarify the failure. Avoid unnecessary removal, installation, disassembly, and replacement.
5. Be careful not to burn your hands, because each part on the vehicle is hot after running.
6. Be sure to tighten fasteners including bolts and nuts to the specified torque.
7. Place shop jacks or safety stands at the specified points.
8. Before disconnecting electrical connectors of sensors or units, be sure to disconnect the ground cable from battery.

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1. Park the vehicle on a level surface.
2. Remove the oil level gauge and wipe it clean.
3. Reinsert the level gauge all the way. Be sure that the level gauge is correctly inserted and in the proper orientation.
4. Remove it again and note the reading. If the engine oil level is below the "L" line, add oil to bring the level up to "F" line.
5. After turning off the engine, wait a few minutes for the oil to drain back into the oil pan before checking the level.
6. Just after driving or while the engine is warm, engine oil level may show in the range between the "F" line and notch mark. This is caused by thermal expansion of the engine oil. NOTE: To prevent overfilling the engine oil, do not add oil above the "F" line when the engine is cold.

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1. Open the engine oil filler cap for quick draining of the engine oil.
2. Drain the engine oil by loosening engine oil drain plug.
3. Replace the drain plug gasket.
4. Tighten the engine oil drain plug after draining engine oil. Tightening torque: 44 N.m (4.5 kgf.m, 32.5 ft.lb)
5. Fill engine oil through the filler pipe up to upper point on level gauge. Make sure that the vehicle is placed level when checking oil level. Use the engine oil of proper quality and viscosity, selected in accordance with the table in figure. Recommended oil API classification SL, SJ or SH grade oil with the words "Energy Conserving" or "Energy Conserving II", or the new API mark indicated on the container (if SL or SJ grade oil is unavailable, use SH or SG grade oil). Engine oil capacity: (Non-turbo model) Upper level; 4.0 l (4.2 US qt, 3.5 lmp qt) Lower level; 3.0 l (3.2 US qt, 2.6 lmp qt) Engine oil capacity: (Turbo model) Upper level; 4.5 l (4.8 US qt, 4.0 lmp qt) Lower level; 3.5 l (3.7 US qt, 3.1 lmp qt ) Oil of a proper viscosity ensures good cold and hot starting by reducing viscous friction and thus increasing cranking speed. CAUTION: When replenishing oil, it does not matter if the oil to be added is a different brand from that in the engine; however, use oil having the API classification and SAE viscosity No. specified by SUBARU. NOTE: If the vehicle is used in areas with very high temperatures or for other heavy duty applications, the following viscosity oils may be used: API classification: SL, SJ or SH SAE viscosity No.: 30, 40, 10W-50, 20W-40, 20W-50.
6. Close the engine oil filler cap.
7. Start the engine and warm it up for a while.
8. After the engine stops, recheck the oil level. If necessary, add engine oil up to the upper level on level gauge.

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1. Disconnect the ground cable from battery.
2. Lift up the vehicle.
3. Remove the under cover.
4. Remove the bolts which install water pipe of oil cooler to oil pump. (Turbo model)
5. Remove the water pipe and hoses between oil cooler and water pump. (Turbo model)
6. Remove the radiator, see «REMOVAL»(/subaru/impreza-wrx/gdgg-2002-2005/remont/cooling-fan/#engine-cooling-system) , Radiator.
7. Remove the crankshaft position sensor.
8. Remove the V-belts. For SOHC, see «REMOVAL»(/subaru/impreza-wrx/gdgg-2002-2005/remont/mechanical/#engine-mecahnical-25l-sohc) , V-belt. For DOHC, see «REMOVAL»(/subaru/impreza-wrx/gdgg-2002-2005/remont/mechanical/#engine-mechanical-20l-dohctc) , V-belt.
9. Remove the rear side V-belt tensioner.
10. Remove the crankshaft pulley by using ST. ST 499977400 CRANKSHAFT PULLEY WRENCH (2000 cc model) ST 499977100 CRANKSHAFT PULLEY WRENCH (2500 cc model)
11. Remove the water pump, see «REMOVAL»(/subaru/impreza-wrx/gdgg-2002-2005/remont/cooling-fan/#engine-cooling-system__removal) , Water Pump.
12. Remove the timing belt guide. (MT vehicles)
13. Remove the crankshaft sprocket.
14. Remove the bolts which install oil pump onto cylinder block.
15. Remove the oil pump by using a flat tip screwdriver. CAUTION: Be careful not to scratch the mating surfaces of cylinder block and oil pump.

INSTALLATION

Install in the reverse order of removal.

Do the following

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1. Apply liquid gasket to the mating surface of oil pump. Liquid gasket: Part No. 004403007 ThreeBond 1215 or equivalent
2. Replace the O-ring (A) with a new one.
3. Apply a coat of engine oil to the inside of oil seal.
4. Be careful not to scratch the oil seal when installing oil pump on cylinder block.
5. Position the oil pump, aligning the notched area with crankshaft, and push the oil pump straight. CAUTION: Make sure the oil seal lip is not folded.
6. Install the oil pump. Tightening torque: 6.4 N.m (0.65 kgf.m, 4.7 ft.lb)

DISASSEMBLY

Remove the screws which secure oil pump cover and disassemble oil pump. Inscribe alignment marks on the inner and outer rotors so that they can be replaced in their original positions during reassembly.

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1. Install the front oil seal by using ST. ST 499587100 OIL SEAL INSTALLER NOTE: Use a new oil seal.
2. Apply a coat of engine oil to the inner and outer rotors.
3. Install the inner and outer rotors in their original positions.
4. Install the oil relief valve and relief valve spring and plug. NOTE: Use a new gasket.
5. Install the oil pump cover. Tightening torque: T1: 5 N.m (0.5 kgf.m, 3.6 ft.lb) T2: 44 N.m (4.5 kgf.m, 32.5 ft.lb)

TIP CLEARANCE

Measure the tip clearance of rotors. If clearance exceeds the limit, replace the rotors as a matched set.

Tip clearance

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1. Standard; 0.04 - 0.14 mm (0.0016 - 0.0055 in)
2. Limit; 0.18 mm (0.0071 in)

CASE CLEARANCE

Measure the clearance between the outer rotor and oil pump rotor housing. If clearance exceeds the limit, replace the rotor.

Case clearance

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1. Standard; 0.10 - 0.175 mm (0.0039 - 0.0069 in)
2. Limit; 0.20 mm (0.0079 in)

SIDE CLEARANCE

Measure the clearance between the oil pump inner rotor and pump cover. If clearance exceeds the limit, replace the rotor or pump body.

Side clearance

1. Standard; 0.02 - 0.07 mm (0.0008 - 0.0028 in)
2. Limit; 0.12 mm (0.0047 in)

OIL RELIEF VALVE

Check the valve for fitting condition and damage, and the relief valve spring for damage and deterioration. Replace the parts if defective.

RELIEF VALVE SPRING

1. Non-Turbo Model Free length; 72.8 mm (2.866 in) Installed length; 54.7 mm (2.154 in) Load when installed; 81.3 N (8.29 kgf, 18.24 lb)

1. Turbo Model Free length; 73.7 mm (2.902 in) Installed length; 54.7 mm (2.154 in.) Load when installed; 93.1 N (9.49 kgf, 20.88 lb)

OIL PUMP CASE

Check the oil pump case for worn shaft hole, clogged oil passage, worn rotor chamber, cracks, and other faults.

OIL SEAL

Check the oil seal lips for deformation, hardening, wear, etc. and replace if defective.

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1. Set the vehicle on a lift.
2. Remove the front wheels.
3. Disconnect the ground cable from battery.
4. Remove the air intake duct and air cleaner case. For Non-turbo model, see «REMOVAL»(/subaru/impreza-wrx/gdgg-2002-2005/remont/mechanical/#air-intake-system-h4so) , Air Intake Duct and «REMOVAL»(/subaru/impreza-wrx/gdgg-2002-2005/remont/mechanical/#air-intake-system-h4so) , Air Cleaner Case.
5. Disconnect the connector from mass air flow sensor (Turbo model).
6. Remove the air intake boot and air cleaner upper cover (Turbo model).
7. Remove the intercooler (Turbo model). See «REMOVAL»(/subaru/impreza-wrx/gdgg-2002-2005/remont/mechanical/#air-intake-system-h4dotc) , Intercooler.
8. Remove the pitching stopper.
9. Remove the radiator upper brackets.
10. Support the engine with a lifting device and wire ropes.
11. Lift up the vehicle. CAUTION: When lifting up the vehicle, raise the wire ropes together.
12. Remove the under cover.
13. Drain the engine oil. Set a container under the vehicle, and remove the drain plug from oil pan.
14. Remove the front and center exhaust pipes (Non-turbo model). See «REMOVAL»(/subaru/impreza-wrx/gdgg-2002-2005/remont/exhaust/#exhaust-system-h4so__removal) , Front Exhaust Pipe and «REMOVAL»(/subaru/impreza-wrx/gdgg-2002-2005/remont/exhaust/#exhaust-system-h4so) , Center Exhaust Pipe.
15. Remove the nuts which install front cushion rubber onto front crossmember.
16. Remove the bolts which install oil pan on cylinder block while raising up engine.
17. Insert the oil pan cutter blade between the cylinder block and oil pan. NOTE: Do not use a screwdriver or similar tool in place of oil pan cutter.
18. Remove the oil strainer.
19. Remove the baffle plate.

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1. Check the seal (A) is securely installed in baffle plate in the correct direction as shown in the figure.
2. Install the baffle plate. Tightening torque: 6.4 N.m (0.65 kgf.m, 4.7 ft.lb)
3. Install the oil strainer onto baffle plate. NOTE: Replace the O-ring with a new one. Tightening torque: 10 N.m (1.0 kgf.m, 7.2 ft.lb)
4. Apply liquid gasket to the mating surfaces and install oil pan. Liquid gasket: Part No. 004403007 Three Bond 1215 or equivalent
5. Tighten the bolts which install the oil pan onto engine block. Tightening torque: 5 N.m (0.5 kgf.m, 3.6 ft.lb)
6. Lower the engine onto front crossmember.
7. Tighten the nuts which install front cushion rubber onto front crossmember. Tightening torque: 69 N.m (7.0 kgf.m, 50.9 ft.lb)
8. Install the front and center exhaust pipe (Non-turbo model). See «INSTALLATION»(/subaru/impreza-wrx/gdgg-2002-2005/remont/exhaust/#exhaust-system-h4so__installation) , Front Exhaust Pipe and «INSTALLATION»(/subaru/impreza-wrx/gdgg-2002-2005/remont/exhaust/#exhaust-system-h4so) , Center Exhaust Pipe. NOTE: Use a new gasket.
9. Install the under cover.
10. Lower the vehicle. CAUTION: When lowering the vehicle, lower the lifting device and wire ropes together.
11. Remove the lifting device and wire ropes.
12. 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)
13. Install the radiator upper brackets.
14. Install the air intake duct and air cleaner case (Non-turbo model). See «INSTALLATION»(/subaru/impreza-wrx/gdgg-2002-2005/remont/mechanical/#air-intake-system-h4so) , Air Cleaner Case and «INSTALLATION»(/subaru/impreza-wrx/gdgg-2002-2005/remont/mechanical/#air-intake-system-h4so) , Air Intake Duct.
15. Install the intercooler (Turbo model). See «INSTALLATION»(/subaru/impreza-wrx/gdgg-2002-2005/remont/mechanical/#air-intake-system-h4dotc) , Intercooler.
16. Install the air intake boot and air cleaner upper cover (Turbo model).
17. Connect the mass air flow sensor connector (Turbo model).
18. Install the front wheels.
19. Connect the battery ground cable to battery.
20. Fill engine oil, see «INSPECTION»(/subaru/impreza-wrx/gdgg-2002-2005/remont/lubrication-system/#engine-lubrication-sysyem) , Engine Oil.

INSPECTION

By visual check make sure the oil pan, oil strainer, oil strainer stay and baffle plate are not damaged.

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1. Remove the generator from bracket, see «REMOVAL»(/subaru/impreza-wrx/gdgg-2002-2005/remont/charging-system/#generators-regulators-except-outback-sport__removal) , Generator.
2. Disconnect the terminal from oil pressure switch.
3. Remove the oil pressure switch.

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1. Apply liquid gasket to the oil pressure switch threads. Liquid gasket: Part No. 004403007 Three Bond 1324 or equivalent
2. Install the oil pressure switch onto engine block. Tightening torque: 25 N.m (2.5 kgf.m, 18.1 ft.lb)
3. Connect the terminal of oil pressure switch.
4. Install the generator on bracket, see «INSTALLATION»(/subaru/impreza-wrx/gdgg-2002-2005/remont/charging-system/#generators-regulators-except-outback-sport__installation) , Generator.

Make sure oil does not leak or seep from where the oil pressure switch is installed.

REMOVAL

Note. The engine oil cooler is installed on turbo models only.

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1. Lift up the vehicle.
2. Remove the under cover.
3. Drain the engine oil. Set a container under the vehicle, and remove the drain plug from oil pan.
4. Drain the engine coolant.
5. Remove the water bypass pipe between oil cooler and water pump.
6. Remove the engine oil filter, see «REMOVAL»(/subaru/impreza-wrx/gdgg-2002-2005/remont/lubrication-system/#engine-lubrication-sysyem) , Engine Oil Filter.
7. Disconnect the connector and remove oil cooler.

Note. The engine oil cooler is installed on turbo models only.

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1. Install in the reverse order of removal. Tightening torque: T: 54 N.m (5.5 kgf.m, 40 ft.lb) NOTE: Use new O-rings.

1. Check that the coolant passages are not clogged using air blow method.
2. Check the mating surfaces of cylinder block, O-ring groove and oil filter for damage.

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1. Remove the under cover.
2. Remove the oil filter with ST. ST 498547000 OIL FILTER WRENCH

1. Use a new oil filter and apply a thin coat of engine oil to the seal rubber.
2. Install the oil filter by turning it by hand, being careful not to damage seal rubber.
3. Tighten more (approximately 2/3 to 3/4 turn) after the seal rubber contacts the cylinder block. Do not tighten excessively, or oil may leak.

1. After installing the oil filter, run the engine and make sure that no oil is leaking around seal rubber. NOTE: The filter element and filter case are permanently jointed; therefore, interior cleaning is not necessary.
2. Check the engine oil level, see «INSPECTION»(/subaru/impreza-wrx/gdgg-2002-2005/remont/lubrication-system/#engine-lubrication-sysyem) , Engine Oil.

Before performing diagnostics, make sure that the engine oil level is correct and no oil leakage exists.

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See also:
• REMOVAL
• REMOVAL
• REMOVAL
• REMOVAL
• REMOVAL
• REMOVAL
• REMOVAL
• REMOVAL
• INSTALLATION
• REMOVAL
• INSTALLATION
• INSPECTION