When it comes to heavy-duty diesels, enthusiasts and truck owners inevitably circle back to the best American diesel engines: Ford's 7.3L PowerStroke, Dodge's 5.9L Cummins, and GM's 6.6L Duramax. If ...

This 2006 Dodge Ram 2500, a mechanic-rebuilt Cummins diesel with a fresh engine and transmission (1,000 miles), offers robust performance and extensive upgrades for heavy-duty enthusiasts.

Diesel engines run hot under load, but extreme heat means trouble. Here are the hidden causes of rising exhaust temps and how to keep them in check.