Special Tools
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. |
- Clean the following components:
• | Use the
J 8089
in order to remove the carbon from the combustion chambers. |
• | Valve stems and heads on a buffing wheel |
• | Remove all dirt, debris, or threadlocking material from the bolt holes. |
- 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
.
- Inspect the cylinder head for warpage. Refer to
Engine Mechanical Specifications
.
- Use the
J 9666
in order to measure the valve spring tension. Refer to
Engine Mechanical Specifications
.
- Inspect for a leaking plug (1). 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
.