That's why, in my case Brian, I checked the temp sender - the one that screws into the head. I unscrewed it from the head and placed it in a pot of very hot water, then monitored the water temp guage on the instrument panel against a separate temp gauge I had. Both read within a few degrees of on another as far as I could tell.
I also did a similar thing with the thermostat where I placed it in a pot of cold water over the stove and heated it up. I monitored the thermostat opening and took a temp reading from my thermometer which was placed in the water. I forget now - have it written down somewhere, at what temp the thermostat starts openiing at, but it was right on the money. So I eliminated 2 possibilities within a short space of time at no cost.
Pud
