Visual Inspection
WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect the cylinder head camshaft bearing surfaces for the following conditions:
- Excessive scoring or pitting
- Discoloration from overheating
- Deformation from excessive wear
- If the camshaft bearing journals appear to be scored or damaged, you must replace the cylinder head. DO NOT machine the camshaft bearing journals.
- If any of the above conditions exist on the camshaft bearing surfaces, replace the cylinder head.
- 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 would 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
- If the cylinder head is cracked or damaged, it must be replaced. No welding or patching of the cylinder head is recommended.
- Inspect the camshaft position actuator oil feed check valves. Damaged, restricted or clogged check valves must be replaced. Refer to Cylinder Head Disassemble .