Polaris 2001 High-Performance Snowmobile Service Manual (PN 9916690), Page 117Get this manual
ENGINE WARNING
Never remove the pressure cap when the engine is warm or hotIf the pressure cap is to be removed, the engine must be coolSevere personal injury could result from steam or hot liquid.Use of non-standard pressure cap will not allow the recovery system to function properlyIf the cap should need replacement, install the correct Polaris cap with the same pressure ratingRefer to the appropriate parts manualNOTE: Always use Polaris premium antifreeze 6040 premixBleed system at specified RPM or air will remain trapped in system, which may result in overheating
Filling and Bleeding Procedure
If the cooling system should become low in the reservoirtank andor filler neck, the system should be bled of any trapped air using one of the following procedures, depending on modelBleed Screw
800 XCR Bleeding Procedure
1Fill cooling systemLeave pressure cap off2With engine running at specified idle speed, loosen bleed screw on water outlet manifold3Continue adding antifreeze mixture to reservoir bottle until system is purged of air4Close bleed screw and tighten securely5Fill reservoir bottle until it is between the minimum and maximum fill marks6Replace pressure cap7Start engine and check for leaks