Quote Originally Posted by Bitsyncmaster View Post
Yes the otterstat and it's wiring are critical. I need to do some changed to my engine harness and I was thinking of changing those two wires with new pins.
Definitely worth doing. My otterstat connectors were pretty much new but the otterstat itself had packed up. I proved it by removing it from the car and boiling it in a saucepan whilst it was connected to a DVM set to measure resistance. Open circuit all day long.

I think there is a lot to be said for running wires into the cabin and having a separate switch to manually override the otterstat in the event that the temp gauge starts increasing and the fans don't come on automatically.