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you need a new machine shop... you don't machine the head surface to fix warpage... you have to straighten it. Ridiculous...




Ah, this is the first time I have heard of this process, can you tell us how it is done?



First time? really? the head is bolted to a torque plate, usually a really thick piece of machined steel and then the head is heated to 400-500 degrees for 2 hours or less and let to cool slowly while still securely fastened to the plate. If your cylinder head was warped and it was just surfaced, that means the sealing surface may be flat, but all other parts of the cylinder head are not. including the cam journals, which can cause galling of the bearing surfaces and also cam failure.