Where do i find the thermostat on the montana

It is located under the trottle body,where the air cleaner attatches to the engine,you will need a 6" extension,13mm socket,13mm box end wrench,ratchet,the top bolt is easy enough to get to but the bottom one will have to be taken out with the wrench,the bolt hole is slotted though..so you can loosen it up till it almost out then slide the thermostat housing off,when you reinstall the t-stat,make sure it stays in place..if it doesnt..when u tighten the housing down you will crack it.hope this helps

Remove the air cleaner tube, throttle body, the thermostat is just below the throttle body in the aluminum cast housing. two bolts to remove.