I hope I'm not jinxing myself here. And article explaining some reasons why headgaskets fail. And to follow this up an article I want to post here for reference in case my engine punches out and needs a rebuild. If I had a big enough shop I would be tearing my engine apart right now.
Why head gaskets fails
The right way to fix a head gasket Cummins
5.9L engine million mile rebuild
Cummins fatal flaws? Apparently so.