BRP E 250 L HO AG B, Service Manual

Page: 251 / 460

251
Powerhead
Powerhead Inspection
11
Use Gel Seal and Gasket Remover to remove all
traces of gaskets, adhesives, and Threebond
sealant from the cylinder block and crankcase.
Carefully remove any carbon accumulation from
the tops and ring grooves of the piston using
Engine Tuner . A ring groove cleaning tool can be
made by breaking an old ring and grinding an
angle on its end. Do not damage ring grooves
while cleaning.
Thoroughly wash entire cylinder block and crank-
case with warm, soapy water to remove all traces
of contaminants.
Air dry cylinder block and crankcase. Blow all
holes and passageways with compressed air.
Cover the cylinder walls with a liberal amount of
outboard lubricant to prevent corrosion.
Powerhead Inspection
For dimensions, refer to Service Specifications
on p. 12.
Before any inspection process can begin, all inter-
nal components must be completely 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 the
cylinder head if warpage exceeds this dimension.

WARNING
To avoid personal injury, wear eye protection
and rubber gloves when using
Gel Seal and
Gasket Remover .
009693

WARNING
To avoid personal injury, wear eye protection
and set compressed air pressure at less than
25 psi (172 kPa).
009684