Dirty hand holding a sludge-covered pump housing with exposed sp…

I was able to take the bolts out using the 12MM and nothing snapped. (yah me!!!)
This is what we are looking at. The thermostat has seen better days and the housing is nasty. I had to use a screwdriver to pry out the thermostat itself,

Owner caption November 2009 · Photo 4 of 11