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Home >> Buick >> 2008 >> Allure CXL >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Mechanical - 5.3L) >> Repair Instructions - Off Vehicle >> Cylinder Head Assemble >> Assembly Procedure

Assembly Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: View Of Valve Components
    GM1559870Courtesy of GENERAL MOTORS CORP.
  1. Clean the cylinder head valve spring shim area.
    2. IMPORTANT: When using the valves and related components again, install the parts to their original location.
  2. Install the valves (228) into the proper location. Refer to Separating Parts .
    3. IMPORTANT: The valve stem oil seal alignment and position on the valve guide is critical.
    An improperly installed valve stem oil seal may lead to excessive oil consumption, increased vehicle emissions, or component damage.
  3. Install the valve stem oil seal (222).
  4. Install the valve spring (223).
  5. Install the valve spring cap (224).
    6. Fig 2: Compressing Valve Spring
    GM260151Courtesy of GENERAL MOTORS CORP.
  6. Compress the valve spring using the J 8062  .
  7. Install the valve stem keys.
    1. Use grease to hold the keys in place and remove the J 8062  .
    2. Ensure the keys seat properly in the groove of the valve stem.
    3. Tap the end to the valve stem with a plastic faced hammer to seat the keys, if necessary.
    8. Fig 3: Measuring Valve Spring Installed Height
    GM64315Courtesy of GENERAL MOTORS CORP.
  8. Measure the valve spring installed height using a ruler.

    Measure from the base of the valve spring to the top of the valve spring.

    Specification: 

    • If the installed height exceeds 46.25 mm (1.82 in), install a valve spring shim of approximately 0.5 mm (0.02 in) thick.
    • Do not shim the valve spring to obtain less than the specified height.

      Do not assemble the components without a spring shim on the cylinder head.

  9. Install the remaining valves, springs, and other components.
    10. Fig 4: Locating Coolant Temperature Sensor
    GM1559875Courtesy of GENERAL MOTORS CORP.
  10. Install sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent, to the threads of the coolant sensor.
    11. NOTE: Refer to Fastener Notice .
  11. Install the coolant temperature sensor (725) into the left cylinder head.

    Tighten:  Tighten the coolant temperature sensor to 20 N.m (15 lb ft).

    12. Fig 5: Locating Coolant Plug
    GM1559878Courtesy of GENERAL MOTORS CORP.
  12. Install threadlock GM P/N 12345382 (Canadian P/N 10953489), or equivalent, to the threads of the plug (229).
  13. Install the coolant plug to the right cylinder head.

    Tighten:  Tighten the coolant plug to 20 N.m (15 lb ft).

    14. Fig 6: Locating Cylinder Head Core Hole Plug
    GM1559873Courtesy of GENERAL MOTORS CORP.
  14. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489), or equivalent, to the sides of the cylinder head core hole plugs (216).
  15. Install the core hole plugs into the cylinder head.

    A properly installed plug should be installed 2.5 mm (0.1 in) below the end face of the head.

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