Blow-by can harm an aging engine, but a certain amount is normal for most vehicles. Here is how to tell when there's too much blow-by in your diesel engine.

Not all braking systems on semis have to be loud to be effective. Exhaust brakes make a fraction of the noise that compression brakes do, here's how they work.

Not all braking systems on semis have to be loud to be effective. Exhaust brakes make a fraction of the noise that compression brakes do, here's how they work.

Diesel engines may seem indestructible, but they are more complicated than you think. Here is what you need to know about engine flooding and diesels.