Cylinder Head Clean and Inspect
Cylinder Head Cleaning and Inspection^ Tools Required
- J 8001 Dial Indicator Set
- J 8358 Carbon Removal Brush
- J 284 10 Gasket Remover
Visual Inspection Procedure
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.
3. 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 inch). DO NOT remove the restrictor. Ensure the restrictor and oil passage are clean and free of any debris.
4. Ensure the left cylinder head oil gallery restrictor is installed to the proper depth of 1.5 - 5.5 mm (0.059 - 0.216 inch).
5. 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 inch). DO NOT remove the restrictor. Ensure the restrictor and oil passage are clean and free of any debris.
6. Ensure the right cylinder head oil gallery restictor is installed to the proper depth of 1.5 - 5.5 mm (0.059 - 0.216 inch).
Cleaning Procedure
1. Clean all cylinder head surfaces with non-corrosive solvent.
Caution: Refer to Safety Glasses Caution in Service Precautions.
2. Blow out all the oil galleries using compressed air.
3. Remove any carbon deposits from the combustion chambers using the J 8358.
4. Remove any gasket material with the J 28410.
5. Clean any debris or build-up from the lifter pockets.
6. Inspect the cylinder head again for the items noted under Visual Inspection.