2004 Ski-Doo REV Series Factory Service Manual, Page 160Get this manual

2004 Ski-Doo REV Series Factory Service Manual, Page 160

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Section 04 ENGINE Subsection 05 (LIQUID COOLING SYSTEM)
Check if the cap no1 pressurizes the system for minutesIf not, install new 90 kPa (13 PSI) cap (do not exceed this pressure)
Coolant