might be the starter relay freezing at that temperature. warm it up and see what happens. put a cover over it or heat it up with the missuses hair drier
Electric paint stripper is the most effective way I know to short of a propane torch
under the turbo and over xhaust front pipe - you can just hit the bottom of it with a stick.What about towing it to loosen it up??That could be worth a try...thats if its the starter motor thats frozen up....i guess it wont help if its the solenoid thats entered the ice age...I did contemplate pouring some boiling water over it , and then running it till it gets warm and dry...after that its figuring out how to stop it freezing up again...The Jeep sits in an open fronted garage , so i guess its going to be a matter of making sure i run the engine up every day and not leave it standing for a few days which i think is what caused the problem... In the colder parts of Russia where it can get down to minus 45 they leave the car engines running all night as stopping it means its not never going to start again , but i can,t afford the fuel to do that....