Just about like any war, weather was a factor in World War Two. Tests were done with the jeep using cold weather gear. The tests took place while winter along the Alcan (Alaska - Canada) Highway. Out of those tests any kits were produced for use in locations with extreme cold weather. The Winterization Field Kit included in part:
Blanket, brush guard, assembly Blanket, hood, assembly Blanket, under fender, left, assembly Blanket, under fender, right, assembly Blanket, under motor, assembly varied spring clips Fasteners to attached the covers to the jeep Drawings showing the facility of the radiator and brush guard facility instructions Spring, retaining for the under motor blanket etc.
Hood
While in Alaska from 1988 to 1991, I was able to put the hood and grille blankets to good use. The set that I found, man had sewn them together so that you couldn't open the hood with the covers attached. Wasn't usually a problem. Boy, did these covers work well. while the harsh Alaska winters it was nothing for the climatic characteristic to dip below -45F. With the covers attached and the radiator flap complete the Jeep's machine stayed warm but never too hot. I also had a heater installed and that kept the inside of the jeep to a tolerable condition.
Later I was able to find a Ww2 heater (part Wo- A-11839) designed for the Jeep. This heater mounts over the driver's feet! Sure keeps your feet nice and warm and is pretty effective even at -45F. Of course, I was properly dressed with a Air Force issued parka, bunny pants and mukluks (boots). If the weather is less severe, don't try to drive your jeep with tennis shoes on--your shoes will melt!
Ww2 Winterization - Hood and Grille Blankets For the Willys Mb and Ford GpwSee Also : rockwell tools blog reviews