3.50
9926806 R03 - 2015 - 2016 RANGER ETX / 570 2-SEAT 2015 - 2016 RANGER 570 CREW Service Manual
© Copyright Polaris Industries Inc.
2. Compress the valve spring using valve spring
compressor (PV-1253) and adapter (PU-51038).
3. Push down on the spring and remove the split
keepers
e
.
4. Slowly release valve spring pressure and remove the
compressor adapter.
5. Remove the valve retainer
w
, valve spring
r
, valve
stem seal
t
and valve spring seat
y
. Discard the
valve seal.
NOTE
Replace valve seals whenever cylinder head is
disassembled. Hardened, cracked or worn seals will
cause excessive oil consumption.
6. Lift up the cylinder head and push the valve
u
out,
keeping it in order for reassembly in the same valve
guide.
7. Repeat the previous steps to remove the remaining
valves.
8. Clean the combustion chamber and head gasket
surface.
9. Measure the free length of each valve spring with a
vernier caliper and compare to specification.
MEASUREMENT
Valve Spring Free Length:
Standard: 1.667" (42.33 mm)
CYLINDER HEAD INSPECTION
Thoroughly clean cylinder head surface to remove all
traces of gasket material and carbon.
CAUTION
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.
ENGINE / COOLING SYSTEM
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