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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 120 (Engine Mechanical - 3.8L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Replacing Valve Stem Oil Seal & Valve Spring >> Removal

Replacing Valve Stem Oil Seal & Valve Spring: Removal

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the left or the right valve rocker arm cover. Refer to Replacing Valve Rocker Arm Cover - Left  or Replacing Valve Rocker Arm Cover - Right .
    2. IMPORTANT: Rotate the engine so that the piston in the cylinder being worked on is at top dead center before removing the valve locks. This will eliminate the possibility of the valve accidentally falling inside the cylinder.
  2. Remove the valve rocker arms and the push rods. Refer to Replacing Valve Rocker Arm and Push Rod .
  3. Remove the spark plug. Refer to Spark Plug Replacement in Engine Controls - 3.8L.
    4. Fig 1: Identifying J 23590 At Spark Plug Port
    GM406031Courtesy of GENERAL MOTORS CORP.
  4. Install the J 23590  to the spark plug port and apply compressed air in order to hold the valves closed. See Special Tools .
    5. Fig 2: View Of J 38606 Installed On Valve Spring
    GM406033Courtesy of GENERAL MOTORS CORP.
  5. Install the J 38606  on the valve spring.
    6. Fig 3: Compressing Valve Spring
    GM190527Courtesy of GENERAL MOTORS CORP.
  6. Compress the valve spring using the J 38606  .
  7. Remove the valve locks.
  8. Remove the valve spring and cap.
    9. Fig 4: Removing Valve Stem Oil Seal
    GM406035Courtesy of GENERAL MOTORS CORP.
  9. Remove the valve stem oil seal.
  10. Inspect the valve spring for bent, cracked, or broken parts. Replace the valve spring if damaged. Refer to Cylinder Head Cleaning & Inspection .
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