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Originally Posted by t walgamuth
unfinished. you install the new sleeves, with the tops sticking out of the block, deck them along with the block, flush and bore them to size. they come undersize. this insures that the new bores are exactly perpendicular to the face of the block/head. dont know what grit they are honed. but i am sure it is a cross hatch pattern.
tom w
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tom- Do you know if they are a flanged sleeve and what the wall thickness is? It surprises me that Mercedes has the installer bore and hone. I would have thought that they would want to do this rather than trusting the finish to anyone. When you say that it insures that the new bores are perpendicular to the block/head I am also assuming that Mercedes recommends that the boring machine be centered from the top deck which is where our shop's older machines center. The newer floating column boring machines center from the main bearing bosses. As for the cross hatch pattern our shop tries to get as close to a 45 degree pattern as possible.