Subaru Impreza 2003, Service Manual

Page: 1636 / 3610

4AT-104
AUTOMATIC TRANSMISSION
OIL PUMP HOUSING
3) Install the oil seal and secure it using three bolts
being careful not to damage oil seal lip.
Tightening torque:
7 N·m (0.7 kgf-m, 5.1 ft-lb)
E: INSPECTION
1) Check seal ring and O-ring oil seal for breaks or
damage.
2) Check other parts for dents or abnormalities.
3) Selection of oil pump rotor assembly
(1) Tip clearance
Install inner rotor and outer rotor to oil pump.
With rotor gears facing each other, measure
crest-to-crest clearance.
Tip clearance:
0.02 — 0.15 mm (0.0008 — 0.0059 in)
(2) Side clearance
Set a depth gauge to oil pump housing, then
measure oil pump housing-to-rotor clearances.
Side clearance:
0.02 — 0.04 mm (0.0008 — 0.0016 in)
(3) If depth and/or side clearances are outside
specifications, replace rotor assembly.
Non-turbo model:
Turbo model:
Measure the total end play and adjust to within
specifications. <Ref. to 4AT-105, ADJUST-
MENT, Oil Pump Housing.>
(A) Oil seal retainer
(B) Drive pinion shaft
(A) Thickness gauge
(B) Inner rotor
(C) Outer rotor
AT-00183
(A)
(B)
AT-01038
(B)
(C)
(A)
(A) Depth gauge
(B) Inner rotor
(C) Outer rotor
Oil pump rotor assembly
Part No. Thickness mm (in)
15008AA060 11.37 — 11.38 (0.4476 — 0.4480)
15008AA070 11.38 — 11.39 (0.4480 — 0.4484)
15008AA080 11.39 — 11.40 (0.4484 — 0.4488)
Oil pump rotor assembly
Part No. Thickness mm (in)
15008AA100 14.87 — 14.88 (0.5067 — 0.5071)
15008AA110 14.88 — 14.89 (0.5071 — 0.5075)
15008AA120 14.89 — 14.90 (0.5075 — 0.5079)
AT-01039
(A)
(B)
(C)