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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 91 (Engine Mechanical - 3.6L (LF4 LGX) - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Valve Stem Oil Seal and Valve Spring Replacement - Left Side (LGX) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2016 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the valve rocker arms. Valve Rocker Arm Replacement - Left Side (LGX) 
  2. Remove the starter. Starter Replacement (LGX) .
    3. Fig 1: Flywheel Holder
    GM4117498Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    If the EN-46106  tool is not installed, the crankshaft may rotate. If the crankshaft rotates, disassembly and reassembly of the entire camshaft timing system may be required.

  3. Install the EN-46106  tool in order to prevent crankshaft rotation.
  4. Remove the spark plug from the applicable cylinder. Spark Plug Replacement (LGX)
  5. Install the EN-39313  adapter to the applicable cylinder.
  6. Connect the EN-39313  adapter to a compressed air source.
    7. Fig 2: Valve Spring Compressor
    GM4166262Courtesy of GENERAL MOTORS COMPANY
  7. Install the EN-46335-A  compressor above the applicable cylinder as shown.
  8. Tighten the EN-46335-A  compressor bolt.
  9. Remove the valve keepers.
  10. Loosen the EN-46335-A  compressor bolt and remove the compressor.
    11. Fig 3: Valve Spring And Retainer
    GM4166266Courtesy of GENERAL MOTORS COMPANY
  11. Valve Spring Retainer- Remove
  12. Valve Spring- Remove
    13. Fig 4: Valve Stem Seal Remover/Installer
    GM4166267Courtesy of GENERAL MOTORS COMPANY
  13. Use the EN-46116  remover/installer in order to remove the valve stem seal.
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