Visual Inspection
WARNING: This page is about a different variant/trim than selected.
- 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 in order to ensure they are properly positioned in the cylinder head. The camshaft position actuator oil feed check valve should be flush to 2 mm (0.0787 in) below the cylinder head deck surface (a).
- Damaged, restricted or clogged check valves can be replaced using the EN 46122 .