Cummins Serial Number and CPL Locations

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 engine 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 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.