3.12
9930588 R02 - 2017-2020 RZR 900 900/S 900/S4 1000/S 1000/S4 Service Manual
© Copyright Polaris Industries Inc.
6. Remove the thermostat cover, seal
t
and thermostat
y
from the engine.
NOTICE
Thermostat has a pop-off relief to allow the bypass
system to operate until the thermostat opens.
7. Clean the thermostat mating surfaces on the engine
and thermostat cover.
8. Install a new thermostat and seal into the cover and
install the cover onto the engine.
9. Install the thermostat cover bolts. Torque bolts to
specification.
TORQUE
Thermostat Cover Bolts:
7 ft-lb (10 Nm)
10.Install coolant hose back on the thermostat cover and
securely tighten the hose clamp.
11. Fill cooling system and proceed to bleed the cooling
system (see Chapter 3 – Cooling System Bleeding
Procedure page ).
COOLING SYSTEM BLEEDING
WARNING
Always wear safety glasses and proper shop clothing
when performing the procedures in this manual. Failing
to do so may lead to injury or death.
NOTICE
If the coolant level is LOW in the radiator or if there are
leaks in the system, the cooling system will not draw
coolant from the reservoir tank.
1. Allow engine and cooling system to cool down.
CAUTION
Escaping steam can cause burns. Never remove the
pressure cap while the engine is warm or hot. Always
allow the engine to cool before removing the pressure
cap.
2. Remove the hood.
3. Remove the cap from the Coolant Reservoir
q
and
fill the reservoir to the MAX line.
4. Remove the radiator pressure cap
w
and add the
necessary amount of Polaris Premium Antifreeze to
the radiator.
5. Remove the cargo box engine access panel.
6. Open the bleed screw
e
to allow any trapped air to
escape.
7. Tighten the bleed screw to specification, top off
coolant and properly install the pressure cap.
TORQUE
Coolant Bleed Screw:
89 in-lb (10 Nm)
ENGINE / COOLING SYSTEM
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