The EPA engine family name is a 12 character number/letter designation included on the engine nameplate for all heavy duty engines sold in the United States. In general, the nameplate is permanently affixed to the engine. The exact location and appearance of the nameplate varies by engine manufacturer. Examples of nameplates from three major engine manufacturers are included below:
Caterpillar Engine Plate Example
Cummins Engine Plate Example
Detroit Diesel Engine Plate Example
