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I've read the NHC250 thread, and I believe that situation is quite different from mine. I have had zero performance issues with this engine, and all of the internal engine components that I investigated reflected the same. I do have a pyrometer installed, and I take action when it gets above...

The subject of this post is my 1990 M923A2 with the Cummins 6CTA 8.3 engine. It was a 2009 "rebuild" at Kansas, including a tag on the front of the engine that says it has standard bore liners and standard size main / rod journals. When I bought the truck from GL in the fall of 2013, it had the...