Oil Pump: Removal

Disconnect battery ground cable.
Drain the working fluid about 0.3 l (0.3 US qt, 0.3 Imp qt) from oil tank.
Remove pulley belt cover bracket.
Loosen oil pump pulley nut, then remove bolts which secure alternator.

Fig 1: Loosening Oil Pump Pulley Nut
Courtesy of SUBARU OF AMERICA, INC.
Loosen pulley belt(s).
Remove the nut and detach oil pump pulley.
Disconnect pipe C from oil pump. Disconnect pipe D from oil tank.
CAUTION:
- Do not allow fluid from the hose end to come into contact with pulley belt.
- To prevent foreign matter from entering the hose and pipe, cover the open ends of them with a clean cloth.
- Except when only oil tank needs to be inspected, detach oil tank and oil pump as a unit. Then separate one from the other on a work bench to prevent oil from spilling on any part of the engine.
Fig 2: Disconnecting Pipe C From Oil Pump
Courtesy of SUBARU OF AMERICA, INC.
Remove three bolts from the front side of oil pump and detach the pump.

Fig 3: Removing Bolts From Front Side Of Oil Pump
Courtesy of SUBARU OF AMERICA, INC.
Remove three bolts from the lower side of bracket and detach the bracket.
CAUTION: The bracket does not need to be removed unless it is damaged.
Place oil pump in a vise, and remove upper shell and baffle from lower shell.
CAUTION: Do not clamp oil pump too hard; otherwise oil pump may be dented.

Fig 4: Removing Upper Shell & Baffle From Lower Shell
Courtesy of SUBARU OF AMERICA, INC.
Remove lower shell from oil pump.

Fig 5: Removing Lower Shell From Oil Pump
Courtesy of SUBARU OF AMERICA, INC.