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Originally Posted by Anthony
Just the opposite, the valve lash is very tight when the engine is cold, about 0.013" for an all aluminum FE. Solids are not a problem.
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For some reason I was remembering the lash gets tighter, as the engine heats. After I wrote that, I kept thinking about the block expanding (growing taller), and I kept coming up with it would be the other way around. It was driving me nuts. Thanks for setting me straight. I feel better now.
I am surprised that running solids in an all aluminum big block engine is not a problem. Again thanks for the info.
I'll have to re-read on the 4.6 modular. I thought it was steel sleeves, but my darn memory is getting so bad I could have that wrong too.