Does anybody have a copy of the oil plug service bulletin they could post? It would be interesting to read what Kubota's analysis and recommended fix was.
That bulliten # is sb79-07. Part # for the new plug is 15401-33631. It says the old plug was aluminum, that explains why it comes out. Two different metal types, expansion rates different.
Would it be possible for someone to email me both TSB #79-07 and TSB #81-06?
From searching the web, apparently Kubota specifies tack welding the new steel plug into the cam, not just driving it in. I would really like to read both TSB's myself since I have multiple engines that need rebuilding. I want to make sure I address this issue correctly.