Reply to "Valve in new engine not seating"

LeMans850iMember

@stevebuchanan posted:
Thanks John. Should that intake valve's air leak be of concern? It seems like the gasoline leak test is a good starting point and that every engine build should include a compressed air leak down test once the heads are installed. Or is this overkill?

See above .. not working anyway and overkill … I think

gasoline leak down is absolutely sufficient!! Lapping the valves provides a surface that seals against gasoline usually and it provides its surface that is not 100% smooth, which is the same idea as the cross hatch on the cylinder wall everything is new and then the wear of the piston rings and the cylinder wall provide a perfect seal! Same holds true with the valve seat and the valve itself!

10/9/2410:39 AM

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