Page 171 - Manual Oficina Polaris Sportsman 570 2014 a 2016

ENGINE / COOLING SYSTEM

5. Remove the valve retainer w, valve spring r, valve CYLINDER HEAD INSPECTION
stem seal t and valve spring seat y. Discard the Thoroughly clean cylinder head surface to remove all
valve seal.
traces of gasket material and carbon.
NOTE
CAUTION
Replace valve seals whenever cylinder head is
disassembled. Hardened, cracked or worn seals will Use care not to damage gasket sealing surface. All
cause excessive oil consumption. 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
6. Lift up the cylinder head and push the valve u out,
keeping it in order for reassembly in the same valve touch sealing surfaces of the new head gasket. 3
guide.
7. Repeat the previous steps to remove the remaining
valves.
CYLINDER HEAD WARP INSPECTION
8. Clean the combustion chamber and head gasket
surface. 1. Lay a straight edge q across the surface of the
cylinder head at several different points and measure
9. Measure the free length of each valve spring with a warp by inserting a feeler gauge between the straight
vernier caliper and compare to specification. edge and the cylinder head surface. If warp exceeds
the service limit, replace the cylinder head.

MEASUREMENT
MEASUREMENT
Valve Spring Free Length:
Standard: 1.667" (42.33 mm) Cylinder Head Warp Limit:
.0039" (0.1 mm)

9926803 R06 - 2014-2016 Sportsman 325 / ETX / 450 HO / 570 Service Manual 3.49
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