Page 149 - Manual Oficina Polaris Sportsman 570 2014 a 2016

ENGINE / COOLING SYSTEM

THERMOSTAT INSPECTION / REPLACEMENT
CAUTION
1. Drain the cooling system (Refer to “Coolant Drain / Never remove pressure cap when engine is warm or
Radiator Removal”, page ). hot. The cooling system is under pressure and serious
2. Remove the thermostat cover bolts q. burns may result. Allow the engine to cool before
servicing.

4. Fill system with approved coolant to the top of the
filler neck.
5. Open the bleed screw (3) located to the left and
below the intake track on the cylinder head to allow all 3
air to escape, then close the screw.

3. Remove the thermostat w and O-ring seal e from
the water pump cover.
4. Install the new thermostat and O-ring seal.
5. Install the thermostat cover and cover bolts. Torque
the cover bolts to specification.
TORQUE
Thermostat Cover Bolt: 6. Fill coolant to the top of the filler neck.
7.3 ft–lbs (10 Nm) 7. Repeat steps 5 and 6.
8. Install the radiator pressure cap.
6. Refill and bleed the cooling system. (Refer to 9. Start the engine and run at 3000 to 4000 RPM until
“Cooling System Bleeding Procedure”). the radiator cooling fan cycles on and off.
10.Stop the engine and allow the cooling system to
completely cool.
COOLING SYSTEM BLEEDING PROCEDURE 11. Repeat steps 3 through 10.
12.Fill coolant recovery bottle to the MAX line.
CAUTION 13.Test drive to confirm proper cooling system operation.
Procedure requires running engine at mid-throttle.
Never run the engine in an enclosed space. Perform
procedure outside in a well-ventilated area. Place
vehicle in PARK. Do not engage parking brake, if
equipped, to prevent RPM limiter from activating.
Allow engine and exhaust components to cool
completely prior to servicing.

1. Turn the engine off and place the vehicle in PARK.
2. Open the front box cover and remove the radiator cap
access panel.
3. Remove radiator pressure cap.

9926803 R06 - 2014-2016 Sportsman 325 / ETX / 450 HO / 570 Service Manual 3.27
© Copyright Polaris Industries Inc.