I spent the majority of the afternoon on this to no avail... I rinsed every which way with a garden hose after removing the thermostat.I poked around the block drain plug and got a tricke; not much water at all. I suspect there is something obstructing water flow or maybe the pump is bad. I'm not sure if this is normal, but when it starts to heat up and I shut it off it spews its guts out. Any ideas??
