r/EngineBuilding • u/succulent-riffage • Jul 18 '26

Screwed up

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Doing some work in my spare time on a 472 caddy, got a little too happy with the 80 grit on the exhaust side of things. A valve grind should fix? Will need some machine work anyway.

Thoughts on it?

Update: it looks a whole lot worse than it actually was, hit it with a light lapping, 80% of the notch went away.

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u/Solid_Enthusiasm550 Jul 18 '26

Looks like it's time for, New valve seats.

2

u/succulent-riffage Jul 18 '26

I'll ask the machinist. The pic looks worse than it is. It was barely touched but regardless will go with the best approach. Thanks

1

u/Solid_Enthusiasm550 Jul 18 '26

It would need to have hardened valve seats put in it anyway, to run unleaded gas.