Visual Inspection Procedure
WARNING: This page is about a different variant/trim than selected.
- Inspect the cylinder head for the following:
- Cracks, damage or pitting in the combustion chambers.
- 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
NOTE: DO NOT machine the camshaft bearing journals. - If the cylinder head is cracked or damaged, it must be replaced. No welding or patching of the cylinder head is recommended.
- The oil passage from the left cylinder head deck face that feeds the stationary hydraulic lifters (SHLAs) and the camshafts has a pressed-in restrictor. The orifice within the restrictor is 3 mm (0.1181 in). DO NOT remove the restrictor. Ensure the restrictor and oil passage are clean and free of any debris.
- Ensure the left cylinder head oil gallery restrictor is installed to the proper depth of 1.5-5.5 mm (0.059-0.216 in).
- The oil passage from the right cylinder head deck face that feeds the stationary hydraulic lifters (SHLAs) and the camshafts has a pressed-in restrictor. The orifice within the restrictor is 3 mm (0.1181 in). DO NOT remove the restrictor. Ensure the restrictor and oil passage are clean and free of any debris.
- Ensure the right cylinder head oil gallery restrictor is installed to the proper depth of 1.5-5.5 mm (0.059-0.216 in).