Here are some pics of the sleeve machining and installation process.
first thing is the block setup in the cnc-here the probe is finding the crankshaft center line
now we find the camshaft centerline-this way we ensure the bores and decks are exactly 45 deg from the camshaft to crankshaft centerline
now we probe the bore locations to determine the location of the bores
now we probe the decks in 6 locations on each bank-this tells us the height and straightness of the decks
here is a report of the locations of the bores and the deck heights-the x locations in parenthesis are the blueprint locations the one beside them are actual.All y locations should be zero
here we are rough boring-this will get us to within .020 of the actual size
block after rough boring
couple shavings underneath
finish boring-we need to be within .0002 when finish boring-that's 2 ten thousanth's of an inch.Accuracy is really the key here-if not bored perfectly-you can crack the block when installing the sleeve or you can have a loose sleeve.There are not too many machines out there that can hold this accuracy-we are very fortunate to have one.
bores ready for sleeves
sleeves installed
ready for final machining