Everything You Should Know About the 3163021 Seal

If you've been hunting for the 3163021 part number lately, there's a good chance you're dealing with a stubborn oil leak or you're mid-overhaul on a heavy-duty engine. Most people don't go looking for specific gasket numbers for fun; usually, it's because something is dripping, smoking, or just plain messy under the hood. Specifically, if you're working with Cummins ISX or QSX engines, this particular seal is one you're going to get very familiar with. ...

February 6, 2026 · 6 min · Micha? Alona