Hi guys, doing a bit of electrical work on my 2006 450 EXC today and had the bike idling for about 5 mins as I tested some of the electrical outputs.. anyways after about five mins the bike began spewing out coolant from the hose that goes into the thermostat from the water pump, why would this happen? It was almost like it built up pressure behind the thermostat until it started coming out. The hose stayed tight on the thermostat and seems to still be sealed. Makes no sense to me. It was only about 5 degrees outside when it happened. Any input?