Mike Goble
Well-Known Member
I had a failure of my thermostat recently, it didn't close at the right temperature resulting in lower than normal engine operating temperatures. I use a later housing with multiple threaded ports for my fan control and mechanical thermometer, and the thermostat is the lower one in the picture. My original E3 housing with the single threaded port uses a thermostat like the upper one, and side-by-side comparison shows that the recirc valve seating surface is recessed further in the old housing. RealOEM shows the same thermostat part numbers interchangeable for all years, so I installed the long thermometer in my short housing. It did take a while longer to warm up, but a 40 mile test drive shows that it does work.
Any clues as to when the housings changed the depth?
Any clues as to when the housings changed the depth?