To find the engine serial number on a Dodge Ram 2500 Quad Cab 4x4 diesel, you'll typically need to look in one of these places:
* Driver's side of the engine block: This is the most common location. Look for a stamped number on a relatively flat surface of the engine block. It might be partially obscured by components, so you may need a flashlight and possibly some cleaning.
* Engine stamped plate: Some Dodge engines have a small metal plate affixed to the engine block near the valve cover or other easily accessible area. This plate will display the engine serial number.
* Vehicle's documentation: Your owner's manual or other vehicle paperwork might list the engine serial number.
* Dealership service records: If you have the vehicle's VIN, a Dodge dealership can pull up the engine information from their records.
Important Note: Because there have been many engine variations used in the Dodge Ram 2500 over the years (Cummins, etc.), the exact location might vary slightly depending on the year and specific engine model. If you can't find it easily, a mechanic or Dodge dealership service department would be able to assist.