2002 Ski-Doo Shop Manual Volume One, Page 174Get this manual
Subsection 09
Section 04 ENGINE (LIQUID COOLING SYSTEM)
COOLING SYSTEM REFILLING PROCEDURE
Recommended Coolant
Use blend of 5050 distilled water and ethyleneglycolThat blend will protect the system from freezing as low as -37C (-35F)Do not reinstall pressure capCAUTION: To prevent rust formation or freezing condition, always replenish the system with recommended premixed coolant