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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 637 (Engine Mechanical - 3.5L (Unit Repair)) >> Repair Instructions >> Cylinder Head Assemble >> Tools Required

Tools Required

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Apply sealant GM P/N 12346004 or equivalent to the NEW water jacket hole expansion plugs.
  2. Install the NEW water jacket hole expansion plugs into the left cylinder head, if removed.
    Fig 1: Installing New Water Jacket Hole Expansion Plugs Into Left Cylinder Head
    G01815226Courtesy of GENERAL MOTORS CORP.
  3. Ensure the NEW water jacket hole expansion plug is installed to the correct depth.
    Fig 2: Identifying Correct Water Jacket Hole Expansion Plug Depth
    G01815227Courtesy of GENERAL MOTORS CORP.
  4. Apply sealant GM P/N 12346004 or equivalent to the NEW water jacket hole expansion plugs.
  5. Install the NEW water jacket hole expansion plugs into the right cylinder head, if removed.
    Fig 3: Installing New Water Jacket Hole Expansion Plugs Into Right Cylinder Head
    G01815228Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to in FASTENER NOTICE .
  6. Apply sealant GM P/N 12346004 or equivalent to the NEW oil gallery threaded plugs.
  7. Install the NEW side oil gallery threaded plugs into the left cylinder head, if removed.

    Tighten 

    Tighten the NEW side oil gallery threaded plugs to 60 N.m (44 ft lbs).

    Fig 4: Installing New Side Oil Gallery Threaded Plugs Into Left Cylinder Head
    G01815229Courtesy of GENERAL MOTORS CORP.
  8. Apply sealant GM P/N 12346004 or equivalent to the NEW oil gallery threaded plugs.
  9. Install the NEW side oil gallery threaded plugs into the right cylinder head, if removed.

    Tighten 

    Tighten the NEW side oil gallery threaded plugs to 60 N.m (44 ft lbs).

    Fig 5: Installing New Side Oil Gallery Threaded Plugs Into Right Cylinder Head
    G01815230Courtesy of GENERAL MOTORS CORP.
  10. Apply sealant GM P/N 12346004 or equivalent to the NEW water jacket hole threaded plugs.
  11. Install the NEW upper water jacket hole threaded plugs into the left cylinder head, if removed.

    Tighten 

    Tighten the NEW upper water jacket hole threaded plugs to 80 N.m (59 ft lbs).

    Fig 6: Install New Upper Water Jacket Hole Threaded Plugs Into Left Cylinder Head
    G01815231Courtesy of GENERAL MOTORS CORP.
  12. Apply sealant GM P/N 12346004 or equivalent to the NEW water jacket hole threaded plugs.
  13. Install the NEW upper water jacket hole threaded plug into the right cylinder head, if removed.

    Tighten 

    Tighten the NEW upper water jacket hole threaded plug to 80 N.m (59 ft lbs).

    Fig 7: Install New Upper Water Jacket Hole Threaded Plug Into Right Cylinder Head
    G01815232Courtesy of GENERAL MOTORS CORP.
  14. Place the valve stem oil seals onto the guides.
    Fig 8: Installing Valve Stem Oil Seals
    G01815233Courtesy of GENERAL MOTORS CORP.

    Important:  NEVER reuse a valve stem oil seal. Always use new seals when assembling the cylinder head.

  15. Mount a new valve stem oil seal using the J 38820. 

    Important:  Force should only be applied to the valve spring contact area of the new valve stem oil seal during installation.

  16. Push and twist the valve stem oil seal into position on the valve guide until the seal positively locks on the guide using the J 38820. 
    Fig 9: Mounting New Valve stem Oil Seal
    G01815234Courtesy of GENERAL MOTORS CORP.
  17. Lubricate the valve stem and valve guide ID with clean engine oil GM P/N 12345501 or equivalent.

    Important:  The valve stem oil seal must not come loose from the valve guide when the valve is installed.

  18. Insert the valve into the valve guide (1) until it bottoms on the valve seat.
    Fig 10: Inserting Valve Into Valve Guide
    G01815235Courtesy of GENERAL MOTORS CORP.
  19. Position the valve spring on the spring seat.
    Fig 11: Positioning Valve Spring On Spring Seat
    G01815236Courtesy of GENERAL MOTORS CORP.
  20. Place the valve spring retainer (2) onto the valve spring.
    Fig 12: Placing Valve Spring Retainer Onto Valve Spring
    G01815237Courtesy of GENERAL MOTORS CORP.
    WARNING: Compressed valve springs have high tension against the valve spring compressor. Valve springs that are not properly compressed by or released from the valve spring compressor can be ejected from the valve spring compressor with intense force. Use care when compressing or releasing the valve spring with the valve spring compressor and when removing or installing the valve stem keys. Failing to use care may cause personal injury.
    CAUTION: Do not compress the valve springs less than 24.0 mm (0.943 in). Contact between the valve spring retainer and the valve stem oil seal can cause potential valve stem oil seal damage.
  21. Compress the valve spring using the J 8062  and the J 42037 
    Fig 13: Compressing Valve Spring
    G01815238Courtesy of GENERAL MOTORS CORP.
  22. With the spring compressed, install the valve keepers into the J 43059. 
  23. Place the keepers into position by pushing the tool downward and releasing tension on the J 42037 and the J 8062. 
  24. Verify that the valve keepers are installed by placing a rag over the valve tip and tapping with a dead-blow hammer. The valve keepers and the spring should remain in place.
    Fig 14: Installing Valve Keepers Into J 43059
    G01815239Courtesy of GENERAL MOTORS CORP.
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