3
9850043 R01 - 2017-2021 RANGER 500 / 570 Service Manual
© Copyright Polaris Inc.
3.97
CYLINDER HEAD DISASSEMBLY
CAUTION
Wear eye protection during cylinder head disassembly
and reassembly or when working with the valve springs.
NOTICE
Keep mated parts together and in order with respect to
their location in the cylinder head for assembly
purposes. It is important to install cylinder head
components back in the same location. Mark each
component or place them in an organized rack as you
remove them.
1. Remove the valve tappet
q
from the cylinder head.
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 and remove the split
keepers
q
.
4. Slowly release valve spring pressure and remove the
compressor adapter.
5. Remove the valve retainer
w
, valve spring
e
, valve
stem seal
r
and valve spring seat
t
. Discard the
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
y
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.
ENGINE / COOLING SYSTEM
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