DRIVING ON HIGHWAY AND ALL OF A SUDDEN AFTER A LOUD NOISE THE bottom of the vehicle went on fire. we called the fire department who put out the fire. After looking at the bottom I notice that the crankcase had a big hole. it seems that a valve went right through the cracnkcase. resulting in hot engine oil going on fire. The car is only 5 months old and Carmax will not pay for the repair which could cost me 5,000 dollars. I paid 27,000 for the car.