Isx mystery piece

[Rawze]

To each their own, but ...

If it were my truck, and I had made that mistake (however unlikely) .. I would have replaced the head again, just to be sure that I did not have problems down the road with leaking valve guide seals, etc.

so the answer would have still been NO!.

Last I checked, ... I would want such a large investment into the future of a $40,000 commercial engine to have ZERO POSSIBLE EXCUSES not to last a full million miles in return for spending all that moneys.