LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2006 >> Cobalt LTZ >> Repair and Diagnosis >> External Pages >> Different car >> Section 708 (Engine Mechanical - 2.4L (LE5)) >> Repair Instructions >> On-Vehicle Repair Instructions >> Cylinder Head Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Radiator Inlet Hose To Engine
    GM1656126Courtesy of GENERAL MOTORS CORP.
  1. Drain the cooling system. Refer to Draining and Filling Cooling System (2.2L (L61), 2.4L (LE5)) .
  2. Remove the exhaust manifold. Refer to Exhaust Manifold Replacement (RPO LE5) .
  3. Remove the intake manifold. Refer to Intake Manifold Replacement .
  4. Reposition the radiator surge tank air bleed hose clamp.
  5. Remove the radiator surge tank air bleed hose from the cylinder head.
  6. Reposition the radiator inlet hose clamp using the J 38185  .
  7. Remove the radiator inlet hose from the cylinder head.
  8. Remove the timing chain. Refer to Timing Chain, Sprockets, and/or Tensioner Replacement .
    9. Fig 2: Cylinder Head Bolt Removal Sequence
    GM465863Courtesy of GENERAL MOTORS CORP.
  9. Remove the cylinder head bolts in the sequence shown. Discard the bolts.
    10. Fig 3: View Of Cylinder Head And Gasket
    GM412427Courtesy of GENERAL MOTORS CORP.
  10. Remove the cylinder head.
  11. Remove the cylinder head gasket.
  12. Clean all of the gasket surfaces.
  13. Use the following steps when cleaning the cylinder head and cylinder block surfaces:
    • Use a razor blade gasket scraper to clean the cylinder head and cylinder block gasket surfaces. Do not scratch or gouge either surface.
      • IMPORTANT: DO NOT use any other method or technique to clean these gasket surfaces.
    • Use a NEW razor blade on the cylinder head and a NEW blade on the cylinder block.
      • IMPORTANT: Be careful not to gouge or scratch the gasket surfaces. DO NOT gouge or scrape the combustion chamber surfaces. The feel of the gasket surface is important, not the appearance. There will be indentations from the gasket left in the cylinder head after all of the gasket material is removed. These small indentations will be filled in by the NEW gasket.
    • Hold the razor blade as parallel to the gasket surface as possible.
  14. Clean the old sealer/lube and any dirt from around the bolt holes.
    15. IMPORTANT: DO NOT use a tap to clean the cylinder head bolt holes.
  15. Clean the bolts holes with a nylon bristle brush.
  16. When cleaning the cylinder head bolt holes use suitable commercial spray liquid solvent and compressed air from an extended-tip blow gun in order to reach the bottom of the holes.
scientia non olet · About LEMON Manuals