Content Source: 2021 Slingshot Owner’s Manual (9939930 R02) > Maintenance Chapter

IMPORTANT

The Owner's Manual for this vehicle contains warnings, instructions and other information you must read and fully understand before safely riding or performing maintenance on this vehicle.Always follow the warnings and instructions in Owner's Manual.

Click the CONTENTS link above for the Table Of Contents, or download a full PDF of the Owner Manual in the Owner Support area of Polaris.com

Cooling System

The engine coolant level is maintained by the pressurized surge tank. The surge tank system consists of the surge tank, pressure cap and associated hoses.
As coolant operating temperature increases, the expanded coolant level rises in the surge tank. As engine coolant temperature decreases, the coolant level lowers in the surge tank.
NOTICE
Some coolant level drop on new vehicles is normal as the system is purging itself of trapped air. Observe coolant levels and maintain at the indicated level by adding coolant to the recovery bottle.

Coolant

Always use POLARIS Extended Life Antifreeze 50/50 Premix.
To ensure that the coolant maintains its ability to protect the engine, we recommend that the system be completely drained every five (5) years or 30,000 miles (whichever comes first) and fresh antifreeze added. See your authorized dealer for this service.
Always check and change the coolant at the intervals outlined in the Periodic Maintenance Chart section.

Coolant Level

Always check the coolant level when the engine is cold and while parked on a level surface. Maintain the coolant level at the “cold fill” level mark on the surge tank (when the fluid is cool).
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  1. Position the vehicle on a level surface.
  2. Open the hood.
  3. View the coolant level in the recovery bottle.
    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.
  4. If the level is low, slowly remove the pressure cap . Use a funnel to add coolant to the fill level mark.
  5. Reinstall the pressure cap.
    NOTICE
    If coolant must be added often, or if the recovery bottle runs completely dry, there may be a leak in the system. Have the cooling system inspected by your dealer.

Radiator and Cooling Fan

Always check and clean the radiator and fans at the intervals outlined in the Periodic Maintenance Chart beginning on Periodic Maintenance.
NOTICE
Washing the vehicle with a high-pressure hose could damage the radiator fins and impair the radiator's effectiveness. Using a high-pressure system is not recommended.
  1. Check radiator air passages for restrictions or damage.
  2. Carefully straighten any bent radiator fins.
  3. Inspect the cooling fans for smooth rotation.
    caution
    Inspecting the cooling hoses while the engine is running or when the engine is still hot can result in injury. Always make sure the engine is both off and sufficiently cooled before inspection.
  4. Remove any obstructions with low pressure compressed air or low pressure water.

Coolant Hoses Inspection

caution
Inspecting the cooling fans while the engine is running or when the engine is still hot can result in injury. Always make sure the engine is both off and sufficiently cooled before inspection.
Inspect coolant hoses for leaks, deterioration or damage at the intervals outlined in the Periodic Maintenance. Leaks may appear as dry traces that are white/grey in color. Replace worn or damaged hoses.
IMPORTANT
Prior to servicing hoses, always make sure the engine has fully cooled and to release latent pressure by removing the surge tank cap.

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