3
9850043 R01 - 2017-2021 RANGER 500 / 570 Service Manual
© Copyright Polaris Inc.
3.93
ENGINE DISASSEMBLY / INSPECTION -
TOP END
VALVE COVER REMOVAL
NOTICE
The valve cover, camshafts, cylinder head, cylinder and
piston can be serviced with the engine installed in the
chassis.
1. If needed, remove the spark plug wire from the
engine.
2. Remove dirt and debris from valve cover area.
3. Remove the three valve cover shoulder bolts
q
and
isolators
w
using a T40 driver.
4. Carefully lift valve cover from the engine and remove
it out of the right-hand rear wheel well area.
5. Replace isolators after each use
w
6. Replace Valve cover seal
e
if oil leaks are evident
7. Remove the spark plug
r
. Stuff spark plug hole with
a shop towel to prevent anything from falling into the
combustion chamber (if further engine disassembly
is required).
CAMSHAFT / CARRIER REMOVAL
NOTICE
The camshafts can be removed with the engine
installed in the chassis.
1. Rotate the engine so the piston is at Top Dead
Center (TDC) on the compression stroke.
NOTICE
To verify TDC, see “Setting TDC (Top-Dead-Center)”.
2. Remove the hydraulic cam chain tensioner
t
from
the cylinder. Replace the sealing washer
y
upon
reassembly.
ENGINE / COOLING SYSTEM
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