2002 Bombardier Quest 650XT Service Manual, Page 73Get this manual
Section 03 ENGINE Subsection 05 (COOLING SYSTEM)
COOLING SYSTEM LEAK TEST
WARNING
To prevent burning yourself, do not remove the radiator cap or loosen the engine drain plug if the engine is hotInstall special plug (radiator cap) (PN 529 021 400) and hose pincher (PN 295 000 076) on overflow hose no13Pressurize all system through coolant reservoir to 103 kPa (15 PSI)Check all hoses, radiator no14 and cylinderbase for coolant leaksSpray soapwater solution and look for air bubblesR610motr23A
1Leak indicator hole
DRAINING THE SYSTEM
WARNING