Engine carrier mount bolt. front. Left.4.2 LITER. PartQualifier: from 12/06 front. PartQualifier: to 11/06 front. Right.4.2 LITER. A threaded rod with a drive head (such as hex, 12 point, torx, etc.) on one end used to secure the Engine Mount Crossmember to it's Mounting point. Engine Cradle Bolt. Suspension Crossmember Bolt.