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John, Master A.S.E Automotive technician
Category: Chevy
Satisfied Customers: 9176
Experience:  A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician
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What is the procedure to replace the Oil pump pickup tube O-ring

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What is the procedure to replace the Oil pump pickup tube O-ring


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Oil Pump, Screen, and Crankshaft Oil Deflector Replacement

Removal Procedure

    Object Number: 647800  Size: SH

  1. Remove the oil pan. Remove the engine front cover.
  2. Remove the oil pump screen bolt and nuts.
  3. Remove the oil pump screen with O-ring seal.
  4. Remove the O-ring seal from the pump screen.
  5. Discard the O-ring seal.
    Object Number: 683798  Size: SH

  6. Remove the remaining crankshaft oil deflector nuts.
  7. Remove the crankshaft oil deflector.
    Object Number: 64281  Size: SH

  8. Remove the oil pump bolts.

    Important: Do not allow dirt or debris to enter the oil pump assembly, cap end as necessary.

  9. Remove the oil pump.
  10. If required, clean and inspect the oil pump.

  11. Object Number: 64281  Size: SH

  12. Align the splined surfaces of the crankshaft sprocket and the oil pump drive gear and install the oil pump.
  13. Install the oil pump onto the crankshaft sprocket until the pump housing contacts the face of the engine block.

    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.

  14. Install the oil pump bolts.

    Tighten the bolts to 25 N·m (18 lb ft).

    Object Number: 683798  Size: SH

  15. Install the crankshaft oil deflector and nuts until snug.
    Object Number: 647800  Size: SH

  16. Lubricate a NEW oil pump screen O-ring seal with clean engine oil.
  17. Install the NEW O-ring seal onto the oil pump screen.

    Important: Push the oil pump screen tube completely into the oil pump prior to tightening the bolt. Do not allow the bolt to pull the tube into the pump.

  18. Align the oil pump screen mounting brackets with the correct crankshaft bearing cap studs.
  19. Install the oil pump screen.
  20. Install the oil pump screen bolt and nuts.


    1. Tighten the bolt to 12 N·m (106 lb in).
    2. Tighten the nuts to 25 N·m (18 lb ft).
  21. Install the engine front cover.
  22. Install the oil pan.
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