Cylinder Head Inspection; Cylinder Head Warp Inspection; Valve Inspection - Polaris RANGER 500 2017 Service Manual

ENGINE / COOLING SYSTEM
2. Compress the valve spring by hand using valve
spring compressor adapter.
Valve Spring Compressor Adapter
PV-43513-A
3. Push down on the spring
q
keepers .
4. Slowly release valve spring pressure and remove the
compressor adapter.
5. Remove the valve retainer
r
stem seal and valve spring seat
valve seal.
NOTICE
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
keeping it in order for reassembly in the same valve
guide.
7. Repeat the previous steps to remove the remaining
valve.
3.52
e
and remove the split
w e
, valve spring , valve
t
. Discard the
y
out,
8. Clean the combustion chamber and head gasket
surface.

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 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.
9850043 R01 - 2017-2021 RANGER 500 / 570 Service Manual
© Copyright Polaris Inc.