Cylinder Head - Clean and Inspect

NOTICE: Do not use any sharp-edged tools to scrape carbon and old gasket material from cylinder head. Be careful not to scuff or nick the metal surfaces when cleaning. Scuffs or nicks could lead to leakage and reduced power output.

Clean

1. Remaining gasket material from cylinder head.
2. Cylinder head combustion chambers using" a wire brush.
3. Using a soft brush and solvent, thoroughly clean entire cylinder head.

Inspect

Tool Required:
J 34673 Straight Edge

1. Check the combustion chambers, intake and exhaust ports. head surface and the top of the head for cracks. If any cracks are found, the cylinder head must be replaced. If cracks cannot be found but are suspected. have cylinder head magna-fluxed.
2. Cylinder head distortion using a J 34673 and a feeler gage. Check distortion at six locations (along all four edges and diagonally across cylinder head). If distortion exceeds the 0.05 mm (0.0020-inch) limit at any location, resurface the cylinder head.
3. Distortion of manifold seating faces. Check cylinder head-to-intake and exhaust manifold mating surface distortion in two diagonal directions. If distortion exceeds 0.10 mm (0.0039-inch), the cylinder head must be replaced.