Parts availability was getting tough in 1990-1991. Power Products mechanics told me then, that the support of these engines would be decreasing quickly. I had the headbolt upgrade from 13 to 14mm done as per Detroit Diesel instruction. The only good thing about these engines was fuel use. They were called "fuel Pincher" engines, and they were.What's so bad about them 8.2 DD's? I remember some others crapping on them.