Oil Pump Assembly: Reassembly

Coat "O" ring and friction ring with petroleum jelly, attach to cam ring and install into oil pump housing. Install first vane ring, rotor, vanes and second vane ring. Install return spring and retainer between housing, cam ring and install control piston. Fit seal in piston groove, with Red seals facing top side.
Set rotor in center of housing bore. Apply ATF to components. Align both pivot pins with pivot holes of cover, and install cover using caution while applying force to pivots. Tighten bolts to 17-20 ft. lbs. (23-27 N.m). After assembling, turn oil pump shaft to check for smooth rotation. Install 4 seal rings and oil seal retainer.

Fig 1: Measuring Height Of Pump Rotor

Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Measuring Pump Housing Depth

Courtesy of SUBARU OF AMERICA, INC.