2004-2005 660 Yamaha Rhino Factory Service Manual, Page 95Get this manual
CHECKING THE COOLANT LEVEL CHANGING THE COOLANT
4Start the engine, warm it up for several minutes, and then turn it off5Check: coolant level NOTE: Before checking the coolant level, wait few minutes until the coolant has settled6Close the hoodCHANGING THE COOLANT 1Remove: driver seat passenger seat console Refer to "SEATS, ENCLOSURE, HOOD AND CARGO BED" in chapter 82Lift the hood up