Oil Pump: Removal

Remove the collector cover. (turbo model)
Disconnect the ground cable from battery.

Fig 1: Disconnecting Ground Cable From Battery
Courtesy of SUBARU OF AMERICA, INC.
Remove the radiator. Refer to CO(H4SO)-19, REMOVAL RADIATOR . Refer to RADIATOR CO(H4DOTC)-21, REMOVAL .
Remove the crankshaft position sensor. Refer to CRANKSHAFT POSITION SENSOR FU(H4SO)-24, REMOVAL. Refer to CRANKSHAFT POSITION SENSOR FU(H4DOTC)-34, REMOVAL .
Remove the water pump. Refer to WATER PUMP CO(H4SO)-15, REMOVAL . Refer to WATER PUMP CO(H4DOTC)-16, REMOVAL .
Remove the crank sprocket. Refer to CRANK SPROCKET ME(H4SO)-53, REMOVAL . Refer to CRANK SPROCKET ME(H4DOTC)-60, REMOVAL .

Fig 2: Removing Crank Sprocket
Courtesy of SUBARU OF AMERICA, INC.
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.

Fig 3: Loosening Relief Valve Plug
Courtesy of SUBARU OF AMERICA, INC.
Remove the oil pump by using flat tip screwdriver.
CAUTION: Be careful not to damage the mating surface of the cylinder block and oil pump.

Fig 4: Identifying Oil Pump
Courtesy of SUBARU OF AMERICA, INC.
Remove the front oil seal from the oil pump.