We don't get that cold down here in TX, but what I did was get a new four core and hoses, replace the thermo with a 180 cause that's factory... Need heat all the time(at least a little) for these trucks! Then I added an electric fan to increase cooling in these hot summers, works great!!!! If the Thermo gets stuckk open, it can be almost as bad as it stuck shut, a Diesel doesn't run well at all too cold, and too hot she runs bad too(also overheats), but stuck open would be better than shut.... What I do is keep tools handy and if she has such a problem, tap on the housing while she's running till she opens, when I get home, change it.... If that doesn't work, take the housing off and remove it till I can get home and replace it.... If it was a $1 difference, than I would go with the one that stayed open, but do to the original design, I would imagine that anything that advertises that would be a shame or really expensive and not worth your money!!!! The original cause for such a difect is not using the correct mixture of antifreeze and water... Too much antifreeze or water and the difference actually takes away from the effect of mixing them in the first place!!!! Just water will rust the engine from the inside out, and just anti freeze will corode the inside too! Hope this helps! /forums/images/graemlins/cool.gif
