248
POWERHEAD
INSPECTION
INSPECTION
For powerhead dimensions, refer to TECHNICAL
DATA on p. 18.
IMPORTANT: Before any inspection process
can begin, all internal components must be com-
pletely clean and free of contaminants.
Visually inspect all parts. Check for unusual wear
patterns, scuffing, or deterioration of aluminum
parts, heat-related discoloration of bearings and
bearing surfaces, and broken components.
Cylinder Head
Check for cylinder head warpage using a piece of
bar stock or machinist’s straightedge and a feeler
gauge set.
Cylinder head warpage must not exceed 0.003 in.
(0.08 mm) per inch of measurement. Replace
head if warpage exceeds this dimension.
Crankshaft
Measure the diameter of each crankpin and main
bearing journal. The lower main bearing journal
would only be measured if the bearing was
removed for another reason.
Visually inspect crankcase seal rings for wear,
grooves, or chipping. If rings appear worn, use a
micrometer to measure ring thickness.
Replace rings that are less than 0.154 in. (3.9
mm) thick.
Install seal rings in their original positions on
crankshaft after inspection.
46517
005281
1936
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