Cracked Sleeves in cylinder, now what?
03-02-2003, 05:14 PM
#1
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Cracked Sleeves in cylinder, now what? I was wondering if you can just buy cylinder wall sleeves individual or if you have to buy a set. I finished tearing my engine down and noticed I have 1 cylinder with 2 cracks and 2 other cylinders with scoring marks in them. Anyone know the GM part # for the stock sleeves or how much they cost or any idea how much they would cost to replace by a machine shop?
<small>[ March 03, 2003, 12:40 PM: Message edited by: Pro Stock John ]</small>
<small>[ March 03, 2003, 12:40 PM: Message edited by: Pro Stock John ]</small>
03-02-2003, 05:42 PM
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Re: Cracked Sleeves in cylinder, now what? The stock GM gray iron sleeves are [not] replacable with new GM sleeves. They are fused to the block during the aluminum block manufacturing process and cannot be replaced by conventional methods. They just don't pop right out and cannot be ordered through GM sources.
Companies such as MTI, ARE, etc can bore out the old sleeves and install aftermarket sleeves that will yeild 382 cu in. Of course, new larger pistons will also need to be installed.
But again, you just can't go purchase a new sleeve and then install a stock GM piston.
Sounds like you need a new block. Your old block may have a "core value" however. Looks like there is a new GM 5.7 liter short block [or] a new aftermarket "Big Bore" engine in your future.
Don't know whether or not you really wanted to hear that....
Ron,
Companies such as MTI, ARE, etc can bore out the old sleeves and install aftermarket sleeves that will yeild 382 cu in. Of course, new larger pistons will also need to be installed.
But again, you just can't go purchase a new sleeve and then install a stock GM piston.
Sounds like you need a new block. Your old block may have a "core value" however. Looks like there is a new GM 5.7 liter short block [or] a new aftermarket "Big Bore" engine in your future.
Don't know whether or not you really wanted to hear that....
Ron,
03-02-2003, 05:46 PM
#3
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Re: Cracked Sleeves in cylinder, now what? BTW, scoring marks in the cyl. bores can be corrected with a honing machine and a new set of pistons. A cracked GM sleeve cannot be repaired as stated above.
Did you get the engine real hot? Sleeves don't normally crack unless the engine has been very very hot.
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<small>[ March 02, 2003, 05:51 PM: Message edited by: Kimchee and Rice ]</small>
Did you get the engine real hot? Sleeves don't normally crack unless the engine has been very very hot.
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<small>[ March 02, 2003, 05:51 PM: Message edited by: Kimchee and Rice ]</small>
03-03-2003, 08:38 AM
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Re: Cracked Sleeves in cylinder, now what? Hey man thanks alot that is all very useful info! Yeah the block did overheat and 1 time got so hot that it shut off! I guess it's safe to say that there is a 6.0l block instore for the very near future! I think I'm gonna run 370ci and see what I can do with that, cranks for these things are HIGH dollar, and funds are kinda tight right now. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
03-04-2003, 12:33 AM
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Re: Cracked Sleeves in cylinder, now what? If the cracks go all the way throught to the water passages, then the block is only (potentially) good for a big bore conversion.
Depending on the year of the block, you can go .005 and up to .010 over stock.
Depending on the year of the block, you can go .005 and up to .010 over stock.