44. Cylinder Head Cleaning and Inspection
(Specifications)Cylinder Head Cleaning and Inspection (7.0L)
Tools Required
* J 8089 Carbon Removal Brush
* J 9666 Valve Spring Tester
Caution: Refer to Safety Glasses Caution (Safety Glasses Warning) .
Notice: Do not clean titanium components with chlorinated solvents. Brake parts, and similar cleaning solvents, safety solvents, or refrigerant that contains chlorofluorocarbons (CFCs) should not be used. Using chlorinated solvents to clean titanium components can result in component damage, leading to stress corrosion cracking that may be undetected with normal visual inspection. Acceptable materials for cleaning titanium components include non-chlorinated solvents, alcohol, acetone, and methanol.
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 (Replacing Engine Gaskets) .
* Valve stems and heads
Refer to Sealers, Adhesives, and Lubricants (6.2L) Sealers, Adhesives, and Lubricants (7.0L) (Specifications) .
* Bolt hole threads
Remove all dirt, debris, or threadlocking material from the bolt holes.
2. Inspect the cylinder head for the following conditions:
1. Cracks in the exhaust ports and combustion chambers
2. External cracks in the water chambers
3. Gasket surfaces for excessive scratches or gouging
Refer to Replacing Engine Gaskets (Replacing Engine Gaskets) .
4. Bolt hole threads for debris or damaged threads
Refer to Thread Repair (Overhaul) or Thread Repair Specifications (Specifications) .
3. Inspect the cylinder head for warpage. Refer to Engine Mechanical Specifications (6.2L) Engine Mechanical Specifications (7.0L) (Specifications) .
4. Use the J 9666 in order to measure the valve spring tension. Refer to Engine Mechanical Specifications (6.2L) Engine Mechanical Specifications (7.0L) (Specifications) .