2
9850068 R01 - 2020-2021 RZR PRO XP / XP 4 Service Manual
© Copyright Polaris Industries Inc.
2.37
RADIATOR INSPECTION / CLEANING
1. Check engine radiator
q
air passages for restrictions
or damage.
2. Carefully straighten any bent radiator fins.
3. Also check the charge air radiator
w
fins for
restrictions or damage.
4. Remove any obstructions with low pressure
compressed air or low pressure water.
CAUTION
Washing the vehicle with a high-pressure washer could
damage the radiator fins and impair the radiators
effectiveness. Use of a high-pressure washer is not
recommended.
COOLANT FLUSH
1. Allow the vehicle to cool down before working with
the cooling system.
CAUTION
Escaping steam/coolant can cause burns. Never
remove the pressure cap or coolant hose while the
engine is warm/hot.
2. Place a drain pan below the engine water pump
q
and the charge air cooler water pump
w
.
NOTICE
Shock guard is hidden for clarity.
3. Remove the pressure cap from the coolant reservoir.
4. Remove a coolant hose from both water pumps and
allow the vehicle to completely drain.
NOTICE
You may need to elevate the front of the vehicle to allow
all coolant to drain from the radiators and then elevate
the rear of the vehicle to allow coolant to drain from the
engine and charge air cooler.
5. A wet vac may also be used to evacuate coolant from
the system.
6. Connect the coolant hoses at both water pumps and
properly position the clamps..
7. Ensure the transmission is in park.
8. Slowly fill the cooling system at the coolant reservoir
with 50/50 extended life coolant. Refer to Chapter 1 –
General Specifications for approximate coolant
system capacity.
9. Fill the reservoir to the FULL COLD line.
10.Proceed to bleed the cooling system. See Cooling
System Bleeding.
MAINTENANCE
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