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Home >> Chevrolet >> 2014 >> Express 1500 LS, AWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 4.8L (L20), 5.3L (LMF), Or 6.0L (L96 LC8) - Repair Instructions - On Vehicle >> Repair Instructions - On Vehicle >> Valve Stem Oil Seal and Valve Spring Replacement >> Installation Procedure

Installation Procedure

    Fig 1: View Of Valve Stem & Valve Spring Components
    GM832259Courtesy of GENERAL MOTORS COMPANY
  1. Clean the cylinder head valve spring seat and/or shim area.
  2. Lubricate the valve guide and valve stem oil seal with clean engine oil.
  3. Install the valve stem oil seal and shim (1, 5).
  4. Install the valve spring (4).
  5. Install the valve spring cap (3).
    6. Fig 2: View Of J 38606 Compressing Valve Spring
    GM218211Courtesy of GENERAL MOTORS COMPANY
  6. Compress the valve spring using the J 38606  Valve Spring Compressor.
  7. Install the valve keys:
    • Use grease in order to hold the valve keys in place.
    • Make sure the keys seat properly in the groove of the valve stem.
    • Carefully release the valve spring pressure, making sure the valve keys stay in place.
    • Remove the J 38606  Valve Spring Compressor.
    • Tap the end of the valve stem with a plastic faced hammer to seat the keys (if necessary).
    8. Fig 3: View Of J 22794
    GM65039Courtesy of GENERAL MOTORS COMPANY
  8. Remove J 22794  Spark Plug Port Adapter from the spark plug port.
    9. Fig 4: View Of Spark Plug And Sparkplug Seat
    GM14824Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

  9. Hand start the spark plug and tighten to 15 N.m (11 lb ft).
  10. Install the spark plug wires at the ignition coil.
  11. Install the spark plug wire to the spark plug.
  12. Inspect the wires for proper installation:
    • Push sideways on each boot in order to check for proper installation.
    • Reinstall any loose boot.
  13. Install the valve rocker arm. Refer to Valve Rocker Arm and Push Rod Replacement .
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