Thermostat Replacement - Polaris ACE 900 2017 Service Manual

THERMOSTAT REPLACEMENT

WARNING
Never drain the coolant when the engine and radiator
are warm or hot. Hot coolant can cause severe burns.
Allow engine and radiator to cool.
1. Open the front box cover and remove the front
storage bin from the vehicle.
2. Slowly remove the pressure cap to relieve any
cooling system pressure.
3. Remove the lower radiator hose
to a level below the thermostat housing.
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4. Loosen the hose clamp
hose from the thermostat cover.
9929422 R02 - 2017-2019 ACE 900 Service Manual
© Copyright Polaris Industries Inc.
5. Remove the two bolts
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and drain coolant
6. Remove the thermostat cover, seal
and remove the coolant
7. Clean the thermostat mating surfaces on the engine
8. Install a new thermostat and seal into the cover and
9. Install the thermostat cover bolts. Torque bolts to
10. Reinstall coolant hose and refill cooling system.
ENGINE / COOLING SYSTEM
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that retain the thermostat
cover to the engine.
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from the engine.
NOTE
Thermostat has a pop-off relief to allow the bypass
system to operate until the thermostat opens.
and thermostat cover.
install the cover onto the engine.
specification.
TORQUE
Thermostat Cover Bolts:
7 ft-lbs (10 Nm)
Bleed the cooling system.
3
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and thermostat
3.21