Probably dont even need a radiator at that low of temp!!! Heater core alone would probably do the job.
I think I speak for most of us when I say we have no conception what -37 F outdoors feels like or that kind of cold's affect on equipment. I lived near Winona and your are right, it's a whole different world up by Hibbing and Moorhead. -60 F really was the all-time record low ever recorded in Minnesota - it happened in 1996, wow. I read the entire thread and found a couple of things worth noting.Okay, time to kill this thread. No one reads the details anyway. I was in Northern Minnesota for 35 years. We laughed when Minneapolis said it was cold out. In 96 we had -60+- thermometers aren’t accurate that low. My 86 Subaru started without being plugged in.
I have a plan to remedy this: move within a few hundred miles from the Gulf of Mexico.
The physics are:
1. heat moves into colder objects (everybody thinks heat rises, it doesn’t.) Heat makes air more buoyant and then rises. Liquid is similar.
2. When most liquids and gases are warmed they expand.
This is why I think my thermostat is fine. I think the coolant is expanding but since the thermostat stops its expansion into the upper hose, it takes the next path which is through the lower hose.
If my pump was bad, after 25 minutes warmup and 15 miles at speed, I would have a hot gauge for sure.
I plan to investigate more when it warms up. I am currently doing seven 11-12 hour days a week for 2-4 weeks. No time to mess with it. I thought I was retired???
I was 30 miles from the Canadian and North Dakota border in Minnesota. I am currently in Winnipeg, 75 miles north of the border.
It is supposed to get to near 32f tomorrow through Tuesday.
Yea, this is what I am thinking too. The thermostat never opens because he's losing too much heat through the oil pain/transmission pan. The 3rd best solution would be to try and insulate those, I think.As the engine warms up, the coolant expands, and the pressure rises. With the thermostat closed, there s only one direction for the warming and expanding coolant to go. The lower radiator hose!