I had a 74 914 2.0 liter Porshe. I was driving from Winnipeg, Manitoba to Regina, Saskatchewan at 40 below zero outside air. I was driving at 70 MPH and the engine temp guage went all of the way to the LEFT. The engins started to stumble and run rough. I had to pull over to let it warm up! Kirk Johnson 1962 Monza Wagon 1964 Rampside