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To lap valves or not? this is the question...

1837 Views 6 Replies 5 Participants Last post by  pdvanocudadave
I am rebuilding my 454. I just got the heads back from the machine shop where I had the seats ground. I have brand new valves for it. Springs will remain stock. Cam is only a step up from stock (Edelbrock 2162 with matched intake manifold).
My question is - is it worth lapping the valves? I have searched here in the forums and cant seem to find a definitive answer concerning new valves.
I know how to lap them having done it a few times over the years, just wondering if its even necessary given the valves are new and the machine shop done by a man I trust completely.
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Put head on bench with exhaust ports faceing down.Fill intake ports with liquid and watch around valve face for leakage.Then fill exhaust ports.Lap the ones that leak.It is a good idea to grind new valves.jmi
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