It all starts with the letter prefix or three number that follows seven digits in all. Identifying the Caterpillar engine serial numberĪll of the Caterpillar ESN’s contain the same format usually. Moreover, Caterpillar is also a constant and at the Caterpillar engine and locates at driver’s side of the valve cover. It is nothing but a particular engine type that is at various places as per the model. Most of the engine serial numbers can also be seen just on the dataplate. Locating the caterpillar engine serial number location
