Block Bore and Step Dimensions for 090 Sleeve?

(quoted from post at 11:58:06 08/28/16) I tried searching around this forum and could not find this exact information. The machine shop is about to bore my block (originally had 040 sleeves) for the 090 sleeves. Seems that .001 min to .003 max press fit is recommended. Also makes sense that there should be no interference fit for the top sleeve ring (lip) OD. My main question though is how deep should the top step be ? Seems like it should be deeper than the lip thickness, and then the sleeve is installed flush with the block, but by how much ? I broke the lip on a couple of the 040 sleeves when I installed them so I want to make sure I get it right with the 090 sleeves. On all other sleeve installations, the machine shop has put a step in the bottom of the block bore (about half the sleeve thickness) and then decked the block flat so sleeves and block are flush. This is their first 8N though.

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• [*:2bbd172bfe]Your shop is describing standard practice for sleeveing a block that was not sleeved from the factory[*:2bbd172bfe]You are (re)sleeving an engine that was factory fitted with dry sleeves and there is no step at the bottom of the 8N block. If you choose to do so it as at your machinist's descretion, peril, and skills.[*:2bbd172bfe]Diametrical interference fit should be .0015 MAX and you can safely get by with .0005. Anything more than that is unnecessary and going to cause problems.[*:2bbd172bfe]The workshop manual says to measure the thickness of the flange on the sleeve and counterbore the block to give you .001 sleeve protusion.[*:2bbd172bfe]If you want to do it he easiest way install the sleeves and then DECK the block after you install the sleeves to give you .001 deck height of the sleeve above the block[/list:2bbd172bfe]
  
  TOH

(quoted from post at 14:52:34 08/28/16)

(quoted from post at 11:58:06 08/28/16) I tried searching around this forum and could not find this exact information. The machine shop is about to bore my block (originally had 040 sleeves) for the 090 sleeves. Seems that .001 min to .003 max press fit is recommended. Also makes sense that there should be no interference fit for the top sleeve ring (lip) OD. My main question though is how deep should the top step be ? Seems like it should be deeper than the lip thickness, and then the sleeve is installed flush with the block, but by how much ? I broke the lip on a couple of the 040 sleeves when I installed them so I want to make sure I get it right with the 090 sleeves. On all other sleeve installations, the machine shop has put a step in the bottom of the block bore (about half the sleeve thickness) and then decked the block flat so sleeves and block are flush. This is their first 8N though.

Click to expand...

• [*:c42dc93159]Your shop is describing standard practice for sleeveing a block that was not sleeved from the factory[*:c42dc93159]You are (re)sleeving an engine that was factory fitted with dry sleeves and there is no step at the bottom of the 8N block. If you choose to do so it as at your machinist's descretion, peril, and skills.[*:c42dc93159]Diametrical interference fit should be .0015 MAX and you can safely get by with .0005. Anything more than that is unnecessary and going to cause problems.[*:c42dc93159]The workshop manual says to measure the thickness of the flange on the sleeve and counterbore the block to give you .001 sleeve protusion.[*:c42dc93159]If you want to do it he easiest way install the sleeves and then DECK the block after you install the sleeves to give you .001 deck height of the sleeve above the block[/list:c42dc93159]
  
  TOH

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• 
  
  I revisited the I&T workshop manual description of retro-fitting the .090 wall sleeves and the recommended standout for the sleeve above the block is .001/.003.
  
  I also measured the bore in an old block and it is almost exactly the same length as the sleeves. The only way you could put a step at the bottom of the block bore would be to cut down standard sleeves or use some sort of generic sleeve.
  
  TOH