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Home >> GMC >> 2005 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 174 (Engine Mechanical - 3.6L (Ly7) (2 Of 6)) >> On-Vehicle Repair Instructions - Part 1 >> Valve Stem Oil Seal And Valve Spring Replacement - Left >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2005 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the starter motor. Refer to Starter Motor Replacement (LY7) or Starter Motor Replacement (LH2) in Engine Electrical.
    2. Fig 1: View Of Tool EN 46106
    GM945978Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: If the EN 46106  is not installed, the crankshaft may rotate. See Special Tools . If the crankshaft rotates, disassembly and reassembly of the entire camshaft timing system may be required.
  2. Install the EN 46106  in order to prevent crankshaft rotation. See Special Tools .
  3. Remove the camshafts and rocker arms. Refer to Camshaft Replacement - Left .
  4. Remove the spark plug from the applicable cylinder. Refer to Spark Plug Replacement in Engine Controls - 3.6L (LY7).
  5. Install the J 39313  to the applicable cylinder. See Special Tools .
  6. Connect the J 39313  to a compressed air source. See Special Tools .
    7. Fig 2: View Of Installed Valve Spring Compressor Tool
    GM1338337Courtesy of GENERAL MOTORS CORP.
  7. Install the EN 46110  above the applicable cylinder as shown. See Special Tools .
  8. Tighten the EN 46110  valve spring compressor nut (2). See Special Tools .
    9. Fig 3: View Of Valve Spring Keepers
    GM902903Courtesy of GENERAL MOTORS CORP.
  9. Remove the valve keepers.
  10. Loosen the EN 46110  valve spring compressor nut. See Special Tools .
  11. Remove the valve spring retainer.
    12. Fig 4: View Of Valve Spring
    GM902899Courtesy of GENERAL MOTORS CORP.
  12. Remove the valve spring.
    13. Fig 5: Removing/Installing Valve Stem Seal
    GM1338340Courtesy of GENERAL MOTORS CORP.
  13. Use the EN 46116  (1) in order to remove the valve stem seal (2). See Special Tools .
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