I know there are a lot of motorhomes out there with the cat 7.2 liter. I have had a few problems with mine. I have lost 2 injectors and had a wiring harness for the injectors inside the valve cover dropped down and shorted out on the rocker arms. That was expensive. I also recently had an oil leak around the plate that holds the oil filter where it attaches to the block. This has happened over about a 4 year period and about 30k miles. What kind of luck are others having with their cat c7 engines?
Ken