Snowmobile Polaris 600 RUSH, 600 RUSH PRO-R, 800 RUSH, 800 RUSH PRO-R (2013 year). Instruction - part 22

90

MAINTENANCE

Oil Lines

Inspect oil line condition every 1000 miles (1600 km).

Oil Filter

Please see your dealer for replacement of the in-line oil filter every 2000 
miles (3200 km) as outlined in the maintenance charts beginning on 
page 81. 

91

MAINTENANCE

Cooling System

Coolant

The coolant supplied in the system at the factory is a 50/50 mixture of 
ethylene-glycol and distilled water, which will provide adequate freeze 
protection under most conditions. If the vehicle will be stored or oper-
ated at extremely low temperatures, greater protection may be required. 
Please see your POLARIS dealer. 

When adding or changing coolant, POLARIS recommends using Pre-
mium 60/40 anti-freeze coolant, which is already premixed and ready to 
use. Do not dilute with water. Never exceed a 60% antifreeze/40% water 
mixture. See page 115 for POLARIS products.

Never add tap water to the cooling system. Minerals cause deposits and 
may react adversely with the metals in the engine and cooling system.

Coolant Level

The engine coolant level is controlled by the recovery system. The 
recovery system components are:

• Coolant bottle/overflow tank
• Pressure cap
• Connecting hoses

Always maintain the coolant level at or 
slightly above the FULL COLD mark on 
the coolant bottle (when the engine is 
cold).

1. Stop the engine. 

2. Open the right side panel. 

3. View the coolant level in the coolant 

bottle. 

4. Add coolant as needed.

NOTICE: Operating the snowmobile with insufficient coolant will result in over-

heating and serious engine damage. Always maintain the coolant 
level as recommended.

“Full Cold” Mark

92

MAINTENANCE

Cooling System

Engine Overheating

The over-temperature indicator on the 
instrument cluster will illuminate when the 
engine is overheating. The indicator will 
flash when engine temperature reaches 
critical levels. 

Illuminated Indicator

Take action to cool the engine:

• Drive in loose snow.
• View the coolant level. Do not open the 

pressure cap while the engine is hot. 
Add coolant if the level is low.

• Stop the engine and allow it to cool down.

If you must continue to operate while the indicator light is illuminated, 
drive slowly and stop the engine frequently to allow it to cool down.

Flashing Indicator

If the indicator flashes, continued operation could result in serious 
engine damage. The system will automatically reduce engine power and 
create a misfire condition. Stop the engine immediately. Allow the 
engine to cool down.

If engine overheating seems to be caused by something other than poor 
cooling conditions, see your dealer for service.

Flushing the Cooling System

To ensure that the coolant maintains its ability to protect the engine, 
drain the system completely every two years and add a fresh mixture of 
antifreeze and distilled water. This service must be performed when the 
engine is cold. Ask your POLARIS dealer to check the coolant when he 
performs the fall tune-up on your snowmobile.

93

MAINTENANCE

Cooling System

Bleeding the Cooling System 

CAUTION! Steam and hot liquids will cause burns to your skin. Never bleed the 
cooling system or remove the pressure cap when the engine is warm or hot.

Use of a non-standard pressure cap will not allow the recovery system to 
function properly. If the pressure cap needs replacement, contact your 
dealer for the correct part.

NOTICE: Severe engine damage may occur if the cooling system becomes 

restricted or plugged or contains trapped air pockets.

Peform this procedure in a well-ventilated area. Use the recommended 
coolant. See page 91.

1. Open the side panels and remove the hood.

2. Close the side panels.

WARNING! Never operate a snowmobile with the side panels open or removed. 

3. Position the vehicle with the right ski and control arms elevated at a 

45-degree angle.

4. Fill the coolant bottle to the COLD FILL mark.

5. Using an 8mm wrench, loosen the air bleed screw located on the top 

of the coolant outlet elbow. Use a shop towel to catch any coolant 
that leaks from the bleeder. Tighten the screw after a steady stream 
of coolant flows from the bleeder.

6. Fill the coolant bottle to the COLD FILL mark.

7. Install the coolant bottle cap to the first lock. Do not tighten to the 

fully seated position.

8. Lock the parking brake.

9. Start the engine and run at a fast idle for several minutes, until the 

heaters are warm to the touch. Loosen the bleed screw occasionally 
to purge any trapped air.

10. When all heater extrusions are warm to the touch, stop the engine.

11. Allow the engine and cooling system to cool.

12. Fill the coolant bottle to the COLD FILL mark.

13. Carefully lower the front end of the snowmobile.

14. Secure the bleed screw and reinstall the pressure cap.

15. Open the side panels and reinstall the hood. Close the side panels.