Thanks for the documentation, and glad the results are so good.
One thing you mentioned
Quote:
New exhaust valves when back in good. I checked the seats on the valves they were a little wider than I would like to see but still in the middle of the valve so good enough for a high mileage engine.
I wouldn't worry about this.
Engine builders claim up to 80% of exhaust valve heat is shed through contact with the seat. Reducing the area of contact in the case of exhaust valves, puts more thermal stress on the neck of the valve. It
could be of no measurable difference, but logically seems that it also
could exacerbate the fatigue problem that apparently exists already.
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