Oil Pump

Oil Pump





Disassembly View

Disassembly





1. Use torque converter as work stand. Remove 2 oil seal rings from stator shaft.
2. Remove the O-ring.
3. Remove the stator shaft.
4. Remove the oil pump drive gear.
5. Remove the oil pump driven gear.





6. Remove the oil pump body.
Remove 13 bolts, and then remove the stator shaft from oil pump body.
Then remove drive and driven gear.

Inspection and Repair
Make necessary correction or parts replacement if wear, damage or any abnormal conditions are found through inspection.





1. Check oil pump body bushing.
Using a dial indicator, measure the inside diameter of the oil pump body bushing.
Maximum inside diameter: 38.19 mm (1.5035 inch)
If the inside diameter is greater than the maximum, replace the oil pump body.





2. Check stator shaft bushing.
Using a dial indicator, measure the inside diameter of the stator shaft bushing.
Maximum inside diameter: Front side: 21.58 mm (0.8496 inch)
Maximum inside diameter: Rear side: 27.08 mm (1.0661 inch)
If the inside diameter is greater than the maximum, replace the stator shaft.





3. Check tip clearance of both gears.
Measure between the gear teeth and the crescent-shaped part of the pump body.
Standard tip clearance: 0.11 - 0.14 mm (0.0043 - 0.0055 inch)
Maximum tip clearance: 0.19 mm (0.0075 inch)
If the tip clearance is greater than the maximum, replace the drive gear, driven gear or pump body.





4. Check body clearance of driven gear.
Push the driven gear to one side of the body.
Use a feeler gauge, measure the clearance.
Standard body clearance: 0.07 - 0.15 mm (0.0028 - 0.0059 inch)
Maximum body clearance: 0.2 mm (0.0079 inch)
If the body clearance is greater than the maximum, replace the drive gear, driven gear or pump body.





5. Check side clearance of both gears.
Using a steel straightedge and a feeler gauge, measure the side clearance of both gears.
Standard side clearance: 0.02 - 0.05 mm (0.0008 - 0.0020 inch)
Maximum side clearance: 0.1 mm (0.004 inch)
If the side clearance is greater than the maximum, replace the drive gear, driven gear or pump body.





6. Check oil seal.
Check for wear, damage or cracks.
If necessary, replace oil seal.
Pry off the oil seal with a screwdriver.





Using special tool, install a new oil seal.
The oil seal end should be flush with the outer edge of the pump body.
Oil seal installer: J-9617
Coat the oil seal lip with multipurpose grease.

Reassembly
1. Place the oil pump body on the torque converter.
2. Coat the driven gear and drive gear with ATF.





3. Install the driven gear and drive gear.





4. Align the stator shaft with the bolt holes.
Tighten the thirteen bolts.
Torque: 10 Nm (87 inch lbs.)





5. Install the oil seal ring.
^ Coat the oil seal rings with ATF.
^ Contract the oil seal rings as shown, and install them onto the stator shaft.

NOTE: Do not spread the ring ends too much.





6. Coat a new O-ring with ATF and install it to the oil pump body.




O-ring size (Reference)





7. Check oil pump drive gear rotation.
Make sure the drive gear rotates smoothly when installed to the torque converter.