LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 425 (Engine Mechanical - 4.0L (Unit Repair)) >> Repair Instructions >> Cylinder Head Cleaning and Inspection >> Visual Inspection Procedure

Visual Inspection Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Inspect the cylinder head for the following:
    • Cracks, damage or pitting in the combustion chambers.

    Important:  DO NOT machine the camshaft bearing journals.

    • Scoring of the camshaft bearings and/or the journals. If the camshaft bearing journals appear to be scored or damaged, you must replace the cylinder head.
    • Debris in the oil galleries. Continue to clean the galleries until all debris is removed.
    • Coolant leaks or damage to the deck face sealing surface. If coolant leaks are present, measure the surface warpage as described under Cylinder Head Measurement.
    • Damage to any gasket surfaces
    • Damage to any threaded bolt holes
    • Burnt or eroded areas in the combustion chamber
    • Cracks in the exhaust ports and combustion chambers
    • External cracks in the water chamber
    • Restrictions in the intake or exhaust passages
    • Restrictions in the cooling system passages
    • Rusted, damaged, or leaking core plugs
  2. If the cylinder head is cracked or damaged, it must be replaced. No welding or patching of the cylinder head is recommended.
scientia non olet · About LEMON Manuals