[cobred]

The valvetrain problems happened about 10 months after the 2nd motor was installed according to sa. (if im reading it correctly) The 1st engine had a bad head gasket when new, they sent out a new engine, without getting the 1st one back yet. The second one broke a rocker shaft bolt about 10 months later and they paid for the parts and labor.
I think sa is saying if Don had adjusted the valves after running the engine for x amount of miles it may not have happened. Who knows? The bolt may have been defective, over torqued, the engine may have been over reved, etc?
After reading both partys letters it seems that sa did the right thing in this case.