Join Date: Mar 2003
Location: Fairbanks, Alaska
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I never did have mine hooked up and the jeep ran good at 40 below, and started without being plugged in a 35 below, no problem. I am not saying it would not help cold running as I never hooked mine up. It was on the list of things to do but there were so many other wiring, and other issues that I never got to it.
If the hole goes clear through and is creating a vacuum leak then it needs to be plugged or make a new plate to fit over if a new heater can't be found. I would not use RTV as it tends to soften when exposed to gas. It will eventually get soft enough to be sucked into the engine.
I will start using Metric only when the duodecimal system is adopted!!