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Visual Inspection Chevrolet Spark M300

Mechanical ~217 words
  1. Inspect the cylinder head camshaft bearing surfaces for the following conditions: Scoring or pitting above acceptable tolerances Discoloration from overheating Deformation from wear above acceptable tolerances If the camshaft bearing journals appear to be scored or damaged, you must replace the cylinder head. DO NOT machine the camshaft bearing journals.
  2. If any of the above conditions exist on the camshaft bearing surfaces, replace the cylinder head.
  3. Inspect the cylinder head for the following: Cracks, damage or pitting in the combustion chambers 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 - Deck Flatness Inspection. Burrs or any defects that may degrade the sealing of the NEW secondary camshaft drive chain tensioner gasket 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 passages Restrictions in the intake or exhaust passages Restrictions in the cooling system passages Rusted, damaged or leaking core plugs
  4. If the cylinder head is cracked or damaged, it must be replaced. No welding or patching of the cylinder head is recommended.