45. Cylinder Head Clean and Inspect

Cylinder Head Cleaning and Inspection

Tools Required
^ J8089 Carbon Removal Brush
^ J9666 Valve Spring Tester





1. Important: When cleaning a cylinder head in a thermal type oven, do not exceed 204°C (400°F).

Clean the following components:

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

Important: Be careful not to scuff the chamber.

Use the J8089 in order to remove the carbon from the combustion chambers.
^ Gasket surfaces.
^ Valve stems and heads on a buffing wheel
^ Bolt hole threads Remove all dirt, debris, or threadlocking material from the bolt holes.





2. Inspect the following components:
1. The cylinder head (218) for cracks in the exhaust ports and combustion chambers
2. The cylinder head for external cracks in the water chambers
3. The gasket surfaces for excessive scratches or gouging.
4. The bolt hole threads for debris or damaged threads.





3. Inspect the cylinder head for warpage.





4. Inspect the valve springs for squareness.





5. Use the J9666 in order to measure the valve spring tension. Replace the spring if the spring tension is less than 310 N (70 lbs.) at 45.75 mm (1.80 inch).