3.98
9850043 R01 - 2017-2021 RANGER 500 / 570 Service Manual
© Copyright Polaris Inc.
CYLINDER HEAD INSPECTION
Thoroughly clean cylinder head surface to remove all
traces of gasket material and carbon.
IMPORTANT
Use care not to damage gasket sealing surface. All
gasket surfaces must be clean, dry and free of any oil
or grease upon assembly. Clean sealing surfaces with
rubbing alcohol or electrical contact cleaner. Do not
touch sealing surfaces of the new head gasket.
CYLINDER HEAD WARP INSPECTION
1. Lay a straight edge
q
across the surface of the
cylinder head at several different points and measure
warp by inserting a feeler gauge between the straight
edge and the cylinder head surface. If warp exceeds
the service limit, replace the cylinder head.
MEASUREMENT
Cylinder Head Warp Limit:
.0024" (0.06 mm)
VALVE INSPECTION
1. Remove all carbon from valves with a soft wire wheel
or brush.
2. Check valve face for excessive runout, pitting, and
burnt spots.
3. To check for bent valve stems, mount valve in “V”
blocks and measure with a dial indicator.
4. Check the end of the valve stem for flaring, pitting,
wear or damage.
5. Inspect split keeper groove for wear or flaring in the
keeper seat area.
NOTICE
The valves can be re-faced or end ground, if necessary.
They must be replaced if extensively worn, burnt, bent
or damaged.
ENGINE / COOLING SYSTEM
To Next Page
Loading...
Need help?
General
