For a long time I could not find the source of the strange diesel noise that comes from under the hood in the first few minutes after starting. The belt tensioner bushing on the damper piston was worn and rattled when cold. This will require removing the engine mount on the passenger side as well as the jack to raise the engine so you can remove the belt tensioner bolt. Hand tighten the motor mounting bolts when reinstalling. This is a very simple process, but not easy for a beginner! Good value for money. High quality item!