You wouldn't think of a perfectly healthy car or truck overheating while driving a snowy road, but it happens all the time. What can make a well maintained engine heat up like that? Driving in the snow can present problems to your car or truck outside of the obvious traction issues. In low temperatures, snow and ice can build up and actually clog your car's cooling system. It doesn't clog it from the inside, but rather blocks the air from flowing over the sytem from the outside. It's important to keep your cooling system clean with a regular radiator flush, but don't forget to simply clear the snow and ice from your front grill and underneath your bumper -- that will keep cool air flowing where you need it most.