Powerhead Inspection; Cylinder Head; Crankshaft - BRP E250DHLSCS Service Manual

POWERHEAD

POWERHEAD INSPECTION

POWERHEAD
INSPECTION
For dimensions, refer to SERVICE SPECIFICA-
TIONS on p. 10.
Before any inspection process
IMPORTANT:
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.
224

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.
49425
5220
1936