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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1443 (Engine Mechanical - 4.2L (Ll8)) >> Repair Instructions >> On-Vehicle Repair Instructions >> Cylinder Head Replacement >> Removal Procedure

Removal Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the camshaft cover. Refer to Camshaft Cover Replacement  .
  2. Remove the exhaust manifold. Refer to Exhaust Manifold Replacement (4.2L Engine) .
  3. Remove the front cover. Refer to Engine Front Cover Replacement  .
    4. Fig 1: View Of Cylinder Head Access Hole Plugs
    GM637770Courtesy of GENERAL MOTORS CORP.
  4. Remove the cylinder head access hole plugs.
    5. Fig 2: View Of Timing Chain Tensioner Shoe & Bolt
    GM637584Courtesy of GENERAL MOTORS CORP.
  5. Remove the timing chain tensioner shoe bolt.
  6. Remove the timing chain tensioner shoe.
    7. Fig 3: View Of Timing Chain Guide & Bolts
    GM637585Courtesy of GENERAL MOTORS CORP.
  7. Remove the timing chain tensioner guide bolts.
  8. Remove the timing chain tensioner guide.
  9. Remove the timing chain and the sprockets. Refer to Timing Chain, Sprockets, and/or Tensioner Replacement  .
    10. Fig 4: View Of Cylinder Head Bolts
    GM637587Courtesy of GENERAL MOTORS CORP.
  10. Loosen and remove the cylinder head bolts.
    11. Fig 5: View Of Cylinder Head
    GM637588Courtesy of GENERAL MOTORS CORP.
  11. Remove the cylinder head.
    12. Fig 6: View Of Cylinder Head Gasket
    GM637586Courtesy of GENERAL MOTORS CORP.
  12. Remove the cylinder head gasket.
  13. Place the cylinder head on a flat, clean surface with the combustion chambers face up, in order to prevent damage to the deck face.
  14. If replacing cylinder head refer to Cylinder Head Disassemble  .
  15. Clean and inspect the cylinder head. Refer to Cylinder Head Cleaning and Inspection  .
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