Oil Pump: Assembly

Using the ST, install the front oil seal.
ST 499587100 OIL SEAL INSTALLER

NOTE: Use a new front oil seal.

Fig 1: Installing Front Oil Seal
Courtesy of SUBARU OF AMERICA, INC.
Apply a coat of engine oil to the inner rotor and outer rotor.
Install the inner rotor and outer rotor.
Assemble the oil relief valve and install relief valve spring and plug.
NOTE: Use a new gasket.
Install the oil pump cover.
Tightening torque:

T1: 5.4 N.m (0.6 kgf-m, 4.0 ft-lb)

T2: 44 N.m (4.5 kgf-m, 32.5 ft-lb)

Fig 2: Identifying Oil Pump Components With Torque Specification
Courtesy of SUBARU OF AMERICA, INC.