Oil Pump: Adjustment

WARNING: This page is about a different car, the 2003 Subaru Outback, 2003 Subaru Legacy, and 2003 Subaru Baja. However, it is still accessible from the selected car via links, so may be relevant.

Using ST, measure the distance from the transmission case mating surface to the recessed portion of the high clutch drum "L".
1. ST 398643600 GAUGE
Fig 1: Measuring Distance From Transmission Case Mating Surface To Recessed Portion Of High Clutch Drum "L"
Courtesy of SUBARU OF AMERICA, INC.
Using ST, measure the distance from the oil pump housing mating surface to the top surface of the oil pump cover with thrust needle bearing.
1. ST 398643600 GAUGE
Fig 2: Measuring Distance From Oil Pump Housing Mating Surface To Top Surface Of Oil Pump Cover
Courtesy of SUBARU OF AMERICA, INC.

Calculation of total end play

Select suitable bearing race from among those listed in this table so that clearance C is in the 0.25 to 0.55 mm (0.0098 to 0.0217 in) range.

C = (L + G) - l

BEARING RACE

C	Clearance between concave portion and end of clutch drum support
L	Length from case mating surface to of high clutch
G	Gasket thickness [0.28 mm (0.0110 in)]
l	Height from housing mating surface of clutch drum support

Fig 3: Selecting Bearing Race

Courtesy of SUBARU OF AMERICA, INC.

THRUST NEEDLE BEARING

Part No.	Thickness mm (in)
806528050	4.1 (0.161)
806528060	4.3 (0.169)
806528070	4.5 (0.177)
806528080	4.7 (0.185)
806528090	4.9 (0.193)
806528100	5.1 (0.201)

After completing end play adjustment, insert the bearing race in the recess of the high clutch. Attach the thrust needle bearing to the oil pump cover with vaseline.
After correctly installing the new gasket to the case mating surface, carefully install the oil pump housing assembly. Be careful to avoid hitting the drive pinion against the inside of the case.
Install both parts with dowel pins aligned. Make sure no clearance exists at the mating surface.