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MAINTENANCE
9923142 - 2011 RANGER RZR / RZR S / RZR 4 Service Manual
© Copyright 2010 Polaris Sales Inc.
COOLING SYSTEM
Cooling System Overview
The engine coolant level is controlled, or maintained, by the
recovery system. The recovery system components are the
recovery bottle, radiator filler neck, radiator pressure cap and
connecting hose.
As coolant operating temperature increases, the expanding
(heated) excess coolant is forced out of the radiator past the
pressure cap and into the recovery bottle. As engine coolant
temperature decreases the contracting (cooled) coolant is drawn
back up from the tank past the pressure cap and into the radiator.
NOTE: Some coolant level drop on new machines is
normal as the system is purging itself of trapped air.
Observe coolant levels often during the break-in
period.
NOTE: Overheating of engine could occur if air is
not fully purged from system.
Polaris Premium 60/40 is already premixed and ready to use. Do
not dilute with water.
Coolant Level Inspection
The pressure cap and recovery bottle are located under the front
hood of the vehicle. The coolant level must be maintained
between the minimum and maximum levels indicated on the
recovery bottle.
With the engine at operating temperature, the coolant level
should be between the upper and lower marks on the coolant
recovery bottle. If not, perform the following procedure:
1. Position the vehicle on a level surface.
2. Remove the hood from the front cab.
3. View the coolant level in the recovery bottle.
4. If the coolant level is below the MIN line, inspect the
coolant level in the radiator.
NOTE: If overheating is evident, allow system to
cool completely and check coolant level in the
radiator and inspect for signs of trapped air in
system.
5. Remove the pressure cap. Using a funnel, add coolant to the
top of the filler neck.
6. Reinstall the pressure cap.
NOTE: Use of a non-standard pressure cap will not
allow the recovery system to function properly.
7. Remove recovery bottle cap and add coolant using a funnel.
8. Fill recovery bottle to MAX level with Polaris 60/40
premix Anti Freeze/Coolant or 50/50 or 60/40 mixture of
antifreeze and distilled water as required for freeze
protection in your area.
9. Reinstall the recovery bottle cap.
10. If coolant was required, start engine and check for leaks.
Make sure radiator fins are clean to prevent overheating.
Coolant Strength / Type
Test the strength of the coolant using an antifreeze hydrometer.
• A 50/50 or 60/40 mixture of antifreeze and distilled
water will provide the optimum cooling, corrosion
protection, and antifreeze protection.
• Do not use tap water, straight antifreeze, or straight
water in the system. Tap water contains minerals and
impurities which build up in the system.
• Straight water or antifreeze may cause the system to
freeze, corrode, or overheat.
Recovery Bottle
Pressure Cap
WARNING
Never remove the pressure cap when the
engine is warm or hot. Escaping steam can
cause severe burns. The engine must be cool
before removing the pressure cap.
Polaris 60/40 Anti-Freeze / Coolant
(PN 2871323)
Antifreeze Hydrometer