Subaru 2009 IMPREZA Service Manual page 1946

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AUTOMATIC TRANSMISSION

2) Apply ATF to a new O-ring and attach to the oil

seal retainer. Install the seal to the oil pump hous-

3) Install the oil seal being careful not to damage oil

seal lip, and secure it using three bolts.

Tightening torque:

7 N·m (0.7 kgf-m, 5.2 ft-lb)

(A) Oil seal retainer

(B) Drive pinion shaft

Oil Pump Housing

E: INSPECTION

1) Check the seal ring and oil seal for breaks and

2) Check other parts for dents or faults.

3) Oil pump rotor assembly selection

(1) Tip clearance

Install the inner rotor and outer rotor to the oil

pump. With rotor gears facing each other, mea-

sure the crest-to-crest clearance.

Tip clearance:

0.02 — 0.15 mm (0.0008 — 0.0059 in)

(A) Thickness gauge

(B) Inner rotor

(2) Side clearance

Set a depth gauge to oil pump housing, then

measure the oil pump housing-to-rotor clear-

Side clearance:

0.02 — 0.04 mm (0.0008 — 0.0016 in)

(A) Depth gauge

(B) Inner rotor