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Cerritos Hummer's service department did call today to say that a brass valve guide got
If you lost a valve guide, that would mean that you either can't remove the exhaust correctly for that cylinder (assuming an exhaust valve guide) OR the fuel/air combo coming into the head for that cylinder is incorrect which could be rich or lean...
In either case, it ain't good.
Since they'll have the head off (I'd do a valve job on BOTH heads btw) this will be a good time to start from scratch.
Mark
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