Sled loses coolant every time I ride it. Performance doesn't seem to be effected it pulls the rpm it should with stock clutching, over revs actually. Have never seen it leak externally, even when put on a stand and then observing the snow beneath it. The cap of the container holding the coolant however doesn't lock in all the way, I have a new container on order. When I open the cap after riding there should be a great pressure release, however there isn't. Is the system simply not under enough pressure and so the coolant is evaporating at a temperature lower than it normally would? If the new container does fix the loss of coolant, where should I go from there? What else would cause the lack of pressure, if any, that I observe when removing the cap after a ride? Thanks! 
