Sleeve DROPPING... Darton/GE MFG, but why?
11-19-2002, 07:11 PM
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Sleeve DROPPING... Darton/GE MFG, but why?
With all this talk about sleeves dropping or sinking in motors... does anyone have any pictures of this after its happened, or better yet an EXPLANATION of how and why it happens... therefore maybe somebody can come up with a solution to it?
11-21-2002, 01:59 PM
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Re: Sleeve DROPPING... Darton/GE MFG, but why? (Boostfed)
Yeah that would be nice...
It seems that it'd be *impossible* for a sleeve to sink... considering it should be seated at the far bottom of the block and sealed...
Maybe I'm wrong... are the sleeves "suspended"?
It seems that it'd be *impossible* for a sleeve to sink... considering it should be seated at the far bottom of the block and sealed...
Maybe I'm wrong... are the sleeves "suspended"?
wondering also
11-21-2002, 06:30 PM
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Re: Sleeve DROPPING... Darton/GE MFG, but why? (accordfreak)
My take, may not be 100% correct:
When the sleeving is done, the old sleeves are machined out of their positions to make room for the new ones. Then the diameter of the coolant chambers are bored to spec to allow the new sleeves to fit. At the base of where the sleeves go, down by the crankshaft, there are VERY close tolerances. They must be so close that being just several thousanths off could cause them to slip, or "drop". The sleeves are pressed into the bottom machining diameter of the block and held there by a friction fit. If this fit isn't tight enough, guess what? They will fall. This is my take on this whole sleeve dropping idea. If you guys think about it, its VERY easy to make a sleeve drop. Its what you do about it that counts. Once you've machined that material off the block, it's not going back.
When the sleeving is done, the old sleeves are machined out of their positions to make room for the new ones. Then the diameter of the coolant chambers are bored to spec to allow the new sleeves to fit. At the base of where the sleeves go, down by the crankshaft, there are VERY close tolerances. They must be so close that being just several thousanths off could cause them to slip, or "drop". The sleeves are pressed into the bottom machining diameter of the block and held there by a friction fit. If this fit isn't tight enough, guess what? They will fall. This is my take on this whole sleeve dropping idea. If you guys think about it, its VERY easy to make a sleeve drop. Its what you do about it that counts. Once you've machined that material off the block, it's not going back.
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11-21-2002, 07:46 PM
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Re: Sleeve DROPPING... Darton/GE MFG, but why? (stizzit)
well, i don't understand how the sleeves are held in by friction...i mean, when i picture it, i picture an iron cylinder being held in an aluminum "pocket" strictly by friction...how can that much friction be applied to a cast iron block and not crack?i dunno, maybe i'm picturing it wrong...
also, GE leaves the bottom portion of the stock sleeves and notches it to accept the new iron ones...they show it in an Overboost article..forgot the link...
i still don't get it though..
also, GE leaves the bottom portion of the stock sleeves and notches it to accept the new iron ones...they show it in an Overboost article..forgot the link...
i still don't get it though..
11-21-2002, 07:49 PM
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Re: Sleeve DROPPING... Darton/GE MFG, but why? (stizzit)
the entire cylinder walls are cut in half and the remaining half is used to seat the new sleeves. just like darton has a T-sleeve. Dartons sit only on the lower part but the coolant passage i'm not sure if you remove block material to make it sit.
Just like boostfeds problem. it is impossible for the sleeves to sink. but to begin with were the sleeves installed with the correct height. it coud sink if the step that the tangs were sitting had too much material removed. and if the material removed from the cylinder was xcessively removed. signs of uncalibrated cnc.
Just like boostfeds problem. it is impossible for the sleeves to sink. but to begin with were the sleeves installed with the correct height. it coud sink if the step that the tangs were sitting had too much material removed. and if the material removed from the cylinder was xcessively removed. signs of uncalibrated cnc.
11-22-2002, 08:27 AM
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Re: Sleeve DROPPING... Darton/GE MFG, but why? (TheSwift1)
My buddy had his H22 built by JG and a sleeve dropped while on the dyno...he was quite shitty, rebuilt know and has one of the most powerful accords in the nation!! 30psi in a 4door - talk about a sleeper!
04-30-2004, 10:56 AM
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Re: Sleeve DROPPING... Darton/GE MFG, but why? (ChiTownEG)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ChiTownEG »</TD></TR><TR><TD CLASS="quote">Who did the work? Was in done in Indy?</TD></TR></TABLE>
Look at thread date man. He probrably forgot he had this problem by now
for searching.
Look at thread date man. He probrably forgot he had this problem by now
for searching.
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