Originally posted by pstephens46
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They should now seat properly if the machining was done properly.No need for lapping unless maybe you are building a high performance engine.
I myself probably would have at least colored the seats with a sharpie and and spun each valve to see if I got a nice thin contact line all around the seat. To confirm that all was well with the rework.
Most lapping I have done was when taking apart the engine for some other reason, say piston replacement and while in there lap the valves to clean up minor pitting on the seats..ect. Always kept track of which valve went where.
I don't really know what he meant by "interference" in the context that he used it. Only thing I can think of is maybe he meant that valves will now bed themselves into the seats from being used (which they will) And that's is the interference he talking about..maybe?
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