The easiest way to learn where to find your Cummins engine identification number is by consulting your owner’s manual. If you don’t have the original manual, have no fear. Cummins makes it relatively easy for Cummins serial number lookup to find the data you require.
The good news is, you can always identify the engine serial number and other vital information such as RPM rating, horsepower and a Critical Parts List (Cummins CPL lookup) on the data plate. However, finding the data plate can be difficult because they are frequently located in different positions depending on the model and year.
The following is our list of where to find Cummins engine serial numbers for your particular model to save time and ensure you have the correct information when ordering parts.
Cummins ISB engine serial numbers are commonly found on the rocker cover. In some cases, they are printed on the side of the gear housing.
Cummins ISM engine serial numbers are found on the rocker housing located on the fuel pump side.
Cummins ISX engine serial numbers are conveniently located on top of the rocker level cover.
Cummins ISC and ISL serial numbers consistently have the data plate situated on the top side of the gear housing.
Cummins 6CTA engine serial numbers are listed on both a long metal tag fixed to the front gear housing and also stamped on the left side of the block above the oil cooler housing.
Cummins 4BT 3.9/6BT 5.9 Cummins engine serial numbers are also listed on the metal tag fixed to the front gear housing as well as the back left side near the oil cooler housing.
Cummins QSK45 and QSK60 engine serial numbers are visible on the front gear cover on the left side and sometimes on the rear of the block.
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