"Cool the Engines" is a song written by Tom Scholz, Brad Delp and Fran Sheehan that was originally released on Boston's 1986 album Third Stage. In the US it was also released as a 12" promotional single backed with another song from Third Stage, "The Launch," and as the B-side to the third commercially released single from the album, "Can'tcha Say (You Believe in Me)/Still in Love." It reached #4 on the Billboard Mainstream Rock chart. Billboard also rated it as the #25 Top Rock Track of 1987. It was also included on Boston's 1997 compilation album Greatest Hits.