GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 9617 Oil Pump Seal Installer

Disassembly Procedure

  1. Remove the bushing from the stator shaft.

  2. Object Number: 163548  Size: SH
  3. Remove the O-ring (2) from the pump body (1).

  4. Object Number: 410313  Size: SH
  5. Remove the two oil seal rings from the back of the stator shaft (1) .
  6. Remove the clutch drum thrust washer from the stator shaft.
  7. Remove the 11 bolts.
  8. Remove the stator shaft.
  9. Identify the top and the bottom.

    Keep the gears in assembled order.


    Object Number: 163550  Size: SH
  10. Inspect the body clearance of the driven gear:
  11. 7.1. Push the driven gear to one side of the body.
    7.2. Use a feeler gauge to measure the driven gear body clearance.
    7.3. The standard driven gear body clearance is 0.07-0.15 mm (0.0028-0.0059 in).

    If the driven gear body clearance exceeds 0.3 mm (0.012 in), replace the drive gear or the pump body.


    Object Number: 163560  Size: SH
  12. Inspect the tip clearance of both gears:
  13. 8.1. Measure the tip clearance between the gear teeth and the crescent-shaped part of the pump body.
    8.2. The standard tip clearance is 0.11-0.14 mm (0.0043-0.0055 in).
    8.3. If the tip clearance exceeds 0.3 mm (0.012 in), replace the drive gear, the driven gear or the pump body.

    Object Number: 163564  Size: SH
  14. Use a steel straightedge and a feeler gauge in order to measure the side clearance of both gears.
  15. Clearance
    The standard side clearance is 0.02-0.05 mm (0.0008-0.0020 in).

  16. If the side clearance exceeds 0.1 mm (0.0004 in), replace one of the following components:
  17. • The drive gear
    • The driven gear
    • The pump body
  18. Inspect the front oil seal for the following conditions:
  19. • Wear
    • Damage
    • Cracks

    Object Number: 410322  Size: SH
  20. Use a screwdriver (2) to pry out the front oil seal (1) .

  21. Object Number: 410334  Size: SH
  22. Use J 9617 and a hammer in order to install a new front oil seal.
  23. The seal end should be flush with the outer edge of the pump body (1).

Assembly Procedure


    Object Number: 163548  Size: SH

    Important: Make sure that the top of the gears are facing upward.

  1. Install the following components:
  2. 1.1. The driven gear (3)
    1.2. The drive gear (4)

    Object Number: 410338  Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the stator shaft onto the pump body.
  4. Align the stator shaft with each bolt hole.

    Tighten
    Tighten the stator shaft bolts to 10 N·m (89 lb in).

  5. Coat the thrust washer with petroleum jelly.
  6. Align the tab of the washer with the hollow of the pump body (1) .
  7. Install the thrust washer.


    Object Number: 163548  Size: SH
  8. Install the 2 oil seal rings (6) on the oil pump.
  9. Do not spread the end rings too far.

  10. Use the following procedure to inspect the pump drive gear rotation:
  11. 6.1. Turn the drive gear with 2 screwdrivers.
    6.2. Make sure that the gear rotates smoothly.
  12. Install a new O-ring (2).
  13. Install the race onto the stator shaft.