Cylinder Block And Related Parts; Connecting Rods - Winnebago 1987-1989 LeSharo Service Manual

ENGINE OVERHAUL AND REBUILD
CYLINDER BLOCK AND RELATED PARTS
[I.:'
. . !,'
.y
r
1./
j
l
\
CAUTION
Excessively worn or scorned piston, rings and
cylinder liners may be an indication of abnormal
maintenance or operating conditions which
should be corrected to avoid recurrence of
failure.
In addition to performing proper maintenance,
use of correct types of lubrication filters, fuel
filters and air filters will reduce abrasive
particles and other foreign materials introduced
into the cylinders and oil passages,which will in
turn reduce the rate of engine wear .
Always insist on using oil filters recommended
by Winnebago Industries. The wrong filter could
cause serious internal engine damage due to
improper oil flow characteristics and by-pass
functions.
Always maintain lubricating oils and engine
coolant at the proper levels to prevent engine
overheating.
Extended periods of engine idling and/or use of
improper lubricating oil should be avoided
since a heavy formation of carbon may resul~
causing piston rings to stick.
A used cylinder liner must be honed to break
the glaze which results after long periods of
operation. This insures good "seating" between
the liner wall and the new piston rings. The
honed/deglazed cylinder liner must meet
specifications before it can be reused. See
specifications in "General Information".
The top of the liner must also be
"ridge-reamed" to prevent ridge impact by new
compression rings, which could result in ring
breakage.
83-19
Connecting Rods
Clean
• Connecting rod with solvent and dry with
compressed air. Blow compressed air through
the oil passage in the connecting rod to be sure
it is clear of obstructions.
INSPECT
• Con~ecting rod for cracks and worn or irregular
bearing areas. Replace the rods if the metal has
changed colors due to overheating.
NOTE: If new connecting rods are required,
stamp the cylinder number on the
connecting rod and cap.