By default, diesel engines produce a louder roar than their gas engine counterparts. However, not all loud noises are normal. Sometimes diesel engines will begin to make excessive, worrisome sounds. The engine may begin to clang, grind, or rattle. Many times, these sounds are indicative of a problem. However, there are many components and small systems that make up a diesel engine, so finding the exact cause of a noise can be challenging. As a result, many truckers rely upon an excessive noise diagnosis to help find the issue affecting their respective diesel engines.