It is a block that was cast by GEP after they took over the Humvee engine production from Detroit Diesel, but is an earlier casting number than I have seen before. It is configured as a replacement for a 6.2 with a turbo 400 trans. It is actually a 6.5 but has the Injector pump that is configured to operate the Detent Cable to operate the trans modulator for the turbo 400. Why it has some serpentine items on it is problematic to me. Was it used then pulled? I have bought six new engines that went past their "use by date" and they were all glossy black with no painted over accessories, injector line or fittings and where there was bare metal like in the front and rear of the heads, they had surface rust. These engines are run in to be shure that they are good and warranteeable and then put into a container. The lower block drain plugs are not removed, so the glycol that is inside the block slops out and causes the bare metal areas to rust, even though dessicant is placed onto the container. Do you have the dyno results from this engine and who did this dyno testing and why? If it is new, there would be no need. If it is rebuilt it may be better than new if the builder knew what he was doing. I can post a couple of fotos of what my new engines look like, but it will be Monday until I can do that. Here is a foto of what the GEP label looks like. It is always located on the driver's side valve cover.
