Procedures
CLEANING
1. Before cleaning, check for leaks, damage and cracks.
2. Clean cylinder head and oil passages.
3. Check cylinder head for flatness.
4. Inspect all surfaces with a straightedge (2) if there is any reason to suspect leakage. If out-of-flatness exceeds 0.019 mm (0.00075 in.) times the span length in inches in any direction, either replace head or lightly machine the head surface. As an example, if a 12.0 inch span is 1.0 mm (0.004 in.) out-of-flat, allowable is 12 x 0.019 mm (0.00075 in.) equals 0.22 mm (0.009 in.). This amount of out-of-flat is acceptable. *Maximum of 0.2 mm (0.008 in.) for grinding is permitted.
CAUTION: This is a combined total dimension of stock removal from cylinder head surface.