Check your engine fluids. Checking your coolant levels in winter is just as important as in summer. You should have a 50/50 combination of coolant and distilled water. If you are not sure if your car has the right ratios, you can easily check with a $10 testing kit available at any aftermarket car parts store.Check your belts and hoses. Rubber takes a beating in cold temperatures, which can affect all of the belts and hoses in your engine compartment.