3.52
ENGINE / COOLING SYSTEM
9923523 - 2012 RANGER RZR 570 Service Manual
© Copyright 2011 Polaris Sales Inc.
Honing to Oversize
A finished cylinder should have a 45 degree cross-hatch
pattern to ensure piston ring seating, aid in oil re tention
and reduce r ing vibr ation during initial break-in. Ho ne
cylinder according to hone manufacturer’s instructions, or
these guidelines:
• Use a mo tor sp eed of a pproximately 300-500
RPM, r
un the hon e in and out of the cylinder
rapidly until cutting tension decreases. Remember
to keep the hone drive shaft centered (or cylinder
centered on ar bor) an d to br ing the sto ne
approximately 1/2" (1.3 cm) beyond the bore at the
end of each stroke.
• Release the hone at regular intervals and inspect
th
e bore to determine if it has been cleared, and to
check piston fit. NOTE: Do not allow cylinder to
heat up during honing.
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Cylinder Hone Selection / Honing Procedure
Cylinders may be wet or dry honed depending upon the
hone m anufacturer’s re commendations. W et ho ning
removes more material faster and leaves a more distinct
pattern in the bore.
Cleaning the Cylinder After Honing
It is very important that the cylinder be thoroughly cleaned
after honing to remove all grit material. Wash the cylinder
in a solvent, then in hot, soapy water. Pay close attention
to areas where the cylinder sleeve meets the aluminum
casting. Use electrical contact clea ner if ne cessary to
clean these areas. Rinse thoroughly, dry with compressed
air, and oil the bore immediately with engine oil.
If cylinder wear or damage is excessive, it will be
necessary to oversize the cylinder using a new
oversized piston and rings. This may be
accomplished by either boring the cylinder and
then finish honing to the final bore size, or by
rough honing followed by finish honing.
For oversize honing always wet hone using
honing oil and a coarse roughing stone. Measure
piston (see piston measurement) and calculate
finished bore size. Always leave .002 - .003" (.05
- .07 mm) for finish bore sizing with a fine stone.
Example:
Cross Hatch
pattern
Selecting a hone which will straighten as well as
remove material from the cylinder is very
important. Using a common spring loaded finger
type glaze breaker for honing is never advised.
Polaris recommends using a rigid hone or arbor
honing machine which also has the
capability of oversizing.
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