09-12-2021, 02:56 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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That's a new one for me. Never seen anything like that.
I've heard of guys having a microscopically incorrect surface finish on the valve stems that acted like a file over time, but I've never seen that before.
I also know that GM had a batch of bronze valve guides that were incorrectly hardened on the Z06 Vette several years back. It accelerated the wear.
I'd change the guides and valves both. It will need a valve job as I imagine the valve head has been dancing around on the seat.
Last edited by blykins; 09-12-2021 at 03:05 PM..
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