Engine change on the 43

A.J. Allmendinger, whose No. 43 Ford was one of the more impressive cars in Thursday's qualifying races, will wind up going to the back of the grid Sunday. Near the end of practice, the car was sitting on pit road with a large plume of steam coming out of the overflow. As a precautionary measure, the team decided to go ahead and switch out engines after Happy Hour.

~NASCAR.com~