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Assembly Procedure

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Measuring Valve Stem Height
    GM40072Courtesy of GENERAL MOTORS CORP.
  1. Install the valves. The valves are available in standard size and 0.381 mm (0.015 in) oversize. Use oversize valve seals if oversized valves are used.
  2. Use the following procedure to measure the valve stem height:
    1. Place the valve on the guide. Hold the valve in the closed position.
    2. Use a valve stem height gauge to measure the valve stem height.
    3. The measurement should be 49-50 mm (1.93-1.97 in).
    3. NOTE: Use hand pressure only when installing the valve seal using J 42863. Using too much force may cause damage to the oil seal and possibly lead to excessive oil consumption.
  3. Use the following procedure to measure the valve spring installed height:
    1. Place the valve in the valve guide.
    2. Install the valve spring cap and the valve cap keys.
    3. Seat the valve spring retainer by pulling up.
    4. Use a steel machinists' rule to measure the distance from the spring seat to the bottom of the valve spring cap.
    5. The measurement should be 42-44 mm (1.69-1.75 in).

      If the measurement is not within specifications add shims under the valve spring.

    4. Fig 2: Using J 42863 To Push Valve Stem Oil Seal Over Valve Guide
    GM40071Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Use hand pressure only when installing the valve seal using J 42863  . See Special Tools . Using to much force may cause damage to the oil seal and possibly lead to excessive oil consumption.
  4. Place the valve stem oil seal over the valve stem so the seal begins to contact the valve guide.
  5. Use J 42863  to push the valve stem oil seal over the valve guide. See Special Tools .
    6. Fig 3: Using J 38606 To Install Valve Spring & Valve Cap
    GM154517Courtesy of GENERAL MOTORS CORP.
  6. Use J 38606  to install the valve spring and the valve cap. See Special Tools .
  7. Install the valve keys.
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