Cleaning and Inspection

Figure 124:

Cylinder head must be flat within 0.1 mm (0.004 inch).
Inspect cylinder head camshaft bearings for wear (Fig. 124).
Check camshaft journals for scratches and worn areas. If light scratches are present, they may be removed with 400 grit sand paper. If deep scratches are present, replace the camshaft and check the cylinder head for damage. Replace the cylinder head if worn or damaged. Check the lobes for pitting and wear. If the lobes show signs of wear, check the corresponding rocker arm roller for wear or damage. Replace rocker arm/hydraulic lash adjuster if worn or damaged. If lobes show signs of pitting on the nose, flank or base circle, replace the camshaft.

CLEANING
Remove all gasket material from cylinder head and block. Be careful not to gouge or scratch the aluminum head sealing surface.