Common Problems in Used Cat C7 Engine For Sale Units and How to Avoid Them Anyone who has spent time around diesel trucks knows the Cat C7 has a reputation of being both respected and, at times, misunderstood. It’s a workhorse engine that can run hundreds of thousands of miles when treated well, but it also has a few predictable trouble spots — especially in older or poorly maintained units. When browsing a Used Cat C7 Engine For Sale , the smartest buyers are the ones who kn