Valve seat question…

67autocross said

Have a close look at all the cracks in the seats…anyway they have been knocked out and dumped in zee garbage….

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Now that they are out, let's see the part # on the back-side of that insert. The box has hand written pen mark changes on it, maybe that's not what was supposed to be in the box. Seen that before...
YEAH, there's an explosion of multiple cracks.