In an engine, the relationship between the valves and the pistons is a precarious one. If there is too little space, they can collide. If this happens, the resulting carnage require replacing one of ...

It is incomplete to even talk about degreeing a camshaft without discussing piston-to-valve clearance. It's like learning how to drive but never being taught how to use the brakes. Learning how to ...

First it was a simple oil-cooler failure. A week later, Adam Metter noticed his ’97 Dodge Ram 3500’s 5.9L Cummins engine developed a knock, as the dualie pulled a heavy trailer over a mountain grade.