Doing a rebuild on the Cummins 855 Big Cam can be a tough job to do but when the owner comes to the mechanics shop there is no turning back on him. The mechanics need to do the rebuild and for some it is more pleasure than work, there are Cummins lovers that just adore working on this engine, tweaking it or even rebuilding it.

Here we have a great Cummins 855 big cam that has been rebuilt and now it is ready to start for the first time after. Getting the parts for this rebuild is hard because there are so many false producers that are making the “original” parts and it is very hard to distinguish the correct ones. That’s why you will follow one rule when buying engine parts in the stores, the higher the price the better the quality.

Now all the pistons have been changed on this engine, the piston rings too, all the fuel lines are new and everything else that could be changed is changed and what could not be, it is repaired and made to work and look like new again.

Getting the oil pressure from the first try is the first move that the mechanic does and it is the way to go. If there is no oil pressure in the engine than you will know that something is wrong with it. After getting the oil pressure readings and made sure that everything is fine, than the second try goes and the mechanics need to prime the fuel pump. It was empty because this is the first start after the building.

The start-up of the Cummins 855 big cam is the best thing to see, with all the smoke that came and the cheering from the crowd that is around to see it.