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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Mechanical - 4.6L (4 Of 5)) >> Off-Vehicle Repair Instructions (2 Of 3) >> Cylinder Head Assemble

Cylinder Head Assemble

WARNING: This page is about a different variant/trim than selected.

Tools Required

    Fig 1: View of Expansion Coolant Plugs
    GM1207156Courtesy of GENERAL MOTORS CORP.
  1. Install the expansion coolant plugs into the left cylinder head.
    2. Fig 2: View of Threaded Coolant Plugs
    GM1207157Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the threaded coolant plugs into the left cylinder head.

    Tighten:  Tighten the threaded coolant plugs to 80 N.m (59 lb ft).

    3. Fig 3: View of Expansion Coolant Plugs
    GM1207154Courtesy of GENERAL MOTORS CORP.
  3. Install the expansion coolant plugs into the right cylinder head.
    4. Fig 4: View of Threaded Coolant Plugs
    GM1207155Courtesy of GENERAL MOTORS CORP.
  4. Install the threaded coolant plugs into the right cylinder head.

    Tighten:  Tighten the threaded coolant plugs to 80 N.m (59 lb ft).

    5. Fig 5: View of Exhaust Manifold Studs
    GM1207153Courtesy of GENERAL MOTORS CORP.
  5. Install the exhaust manifold studs into the right cylinder head.

    Tighten:  Tighten the exhaust manifold studs to 6 N.m (53 lb in).

    6. Fig 6: Using J 38820 To Replace Valve Seal
    GM616165Courtesy of GENERAL MOTORS CORP.
  6. Lubricate the valve stem with clean engine oil.
  7. Insert the valve into the valve guide until it bottoms on the valve seat.
  8. Lubricate the new valve seal with engine oil.
  9. Using the J 38820  , install the new valve seal using the following procedure:. See Special Tools .
    1. Place the valve lifter bore protector into the lifter bore.
    2. Mount the new valve seal in the J 38820  . See Special Tools .
    3. Push and twist the new valve seal into position on the valve guide until the seal positively locks on the guide.
    10. Fig 7: Identifying Valve Spring Components
    GM616171Courtesy of GENERAL MOTORS CORP.
  10. Position the valve spring on the spring seat.
    11. Fig 8: View of J 8062 & J 38821
    GM616157Courtesy of GENERAL MOTORS CORP.
    CAUTION: 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.
    NOTE: 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.
  11. Compress the valve spring using the J 8062  and the J 38821  . See Special Tools .
    12. Fig 9: Installing Valve Keepers With EN 46117
    GM1210911Courtesy of GENERAL MOTORS CORP.
  12. With the spring compressed, install the valve keepers into the J-43059-A  . See Special Tools .
    13. Fig 10: View of J 43059
    GM619040Courtesy of GENERAL MOTORS CORP.
  13. Place the keepers into position by pushing the tool downward.
  14. Release the tension on the spring compressor and remove the J 38821  . See Special Tools .
  15. 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.
  16. Repeat this procedure for the remaining valves.
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