52. Cylinder Head Cleaning and Inspection

Cylinder Head Cleaning and Inspection
Tools Required
^ J8089 Carbon Removing Brush
^ J9666 Valve Spring Tester





1. Inspect the cylinder head gasket and the mating surfaces. Inspect for leaks, corrosion, and blowby.
2. If the gasket failed, determine the cause. The following conditions may cause gasket failure:
^ Improper installation
^ A loose or warped cylinder head
^ Missing, off location, or not fully seated dowel pins
^ Low torque on the cylinder head bolts
^ Cylinder head bolts with the incorrect length
^ A warped engine block surface
^ Scratched surfaces
^ Excessive intake manifold torque
^ Cracked engine block threaded holes





3. Caution: Refer to Safety Glasses Caution in Service Precautions.

Important: Do not scuff the chamber.

Use the J8089 in order to remove the carbon from the combustion chambers.
4. Clean the following components:
^ The gasket surfaces Do not use a motorized brush on any gasket sealing surface.
^ Valve stems and heads on a buffing wheel
^ The bolt hole threads Remove all dirt, debris, or threadlocking material from the bolt holes.





5. Inspect the cylinder head mating surfaces for flatness. Replace the cylinder head if it is outside of the specification limit.
6. Inspect the cylinder head for cracks.
7. Inspect the cylinder head deck for corrosion. Do not attempt to weld the cylinder head. If the cylinder head is damaged, replace the cylinder head.





8. Inspect the valve springs for squareness.





9. Use the J9666 in order to measure the valve spring tension. Replace the spring if the spring tension is not within specification.