Tools Required

Caution: Refer to Safety Glasses Caution in the Preface section.





Important: 

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

•	Be careful not to scuff the chamber.

1. Clean the following components:

•	Use the J 8089 in order to remove the carbon from the combustion chambers.

•	Gasket surfaces

•	Refer to Replacing Engine Gaskets .

•	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 cylinder head for the following conditions:

2.1.	Cracks in the exhaust ports and combustion chambers

2.2.	External cracks in the water chambers

2.3.	Gasket surfaces for excessive scratches or gouging

Refer to Replacing Engine Gaskets .

2.4.	Bolt hole threads for debris or damaged threads

Refer to Thread Repair or Thread Repair Specifications .




3. Inspect the cylinder head for warpage. Refer to Engine Mechanical Specifications .



4. Use the J 9666 in order to measure the valve spring tension. Refer to Engine Mechanical Specifications .



5. Inspect for a leaking plug. Second design applications use a rivet-type plug at the top rear coolant passage of each cylinder head. If service of a leaking plug is required, it is necessary to remove the cylinder head from the engine to properly remove the plug. Refer to Cylinder Head Disassemble