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Piston sleeves

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Rick in Utah

08-10-2000 04:42:23




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I have my 8n block in the machine shop for work. The machinist told me that the cylinder sleeve was not flush with the top of the block, said it was down some. Well, he suggests that I return the new sleeves, pistons, etc and get some for a car and he would have to bore it out.....wow, what a dummer. The .090 sleeve is in # 1 cylinder and is about 1/16 down from the top from being flush. Is this going to hurt anything? This is the way it was when I took it apart. Thanks for any information you can give me.

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ZANE

08-12-2000 20:02:42




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 Re: Piston sleeves in reply to Rick in Utah, 08-10-2000 04:42:23  
If the sleeve is .090 and has not been moving it doesn't matter in the least that one of them is a little lower than the deck of the block. The machinest should know this and he can measure the bore of the block to know if a new .090 sleeve will be tight enough in the block to prevent it from moving. There is supposed to be a .005 interference fit of the sleeve in the block and if the machinest is any good he should know this and know that the fact that the lip in the block was turned a little too much is nothing to worry about unless the block was bored too much and the sleeve has moved since it was installed.

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raytasch

08-10-2000 08:47:10




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 Re: Piston sleeves in reply to Rick in Utah, 08-10-2000 04:42:23  
Rick, IMO, it boils down to "Do you trust your machine shop". I have always let my machine shop order and install the sleeves. There is no excuse of a "bad part" in the rare event something goes wrong. The shop does not want a "come back" and neither do you. Every time I rebuild an engine that requires machine work I let the machine shop price the parts for me while knowing what I would have to pay for similar quality parts. There is very seldom enough difference to even consider buying my parts separatly and then carrying them to the shop for installation. If, in fact, you do have a sleeve that has slipped I would want to know why and take measures against the new sleeve slipping. My guess is that the cylinder in question does not have a sleeve and you are seeing the cut in the block that prevents the sleeve from slipping down. fwiw, good luck, ray

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cg

08-10-2000 11:38:43




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 Re: Re: Piston sleeves in reply to raytasch, 08-10-2000 08:47:10  
raytasch: is it "ok" to have a shop price out the parts, and if they are over priced on the parts let them know that you can order them and purchase them cheaper? I mean, would they resent it if you bring in your own parts if they do indeed come cheaper? I'm just curious.



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raytasch

08-10-2000 12:24:58




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 Re: Re: Re: Piston sleeves in reply to cg, 08-10-2000 11:38:43  
It becomes "discussion time". I would think each shop would have their own attitude in this scenareo. In the event there was a very large difference in prices I would think a reputable shop would try to discount their markup or give you an explaination of the price difference. I have NEVER run into the situation where the price difference was enough to question the machine shop's price. At this time I am rebuilding a Jubilee. It had some wear in the cylinders but instead of resleaveing we decided to bore the cylinders .020. The price the shop gave me on pistons and rings was less than I could have purchased them elsewhere. If I were doing the machine work I think I would much rather work with parts that I knew than some off shore or unknow parts someone might carry in. Don't be afraid to talk with the people. If you do not understand prices ask for an explaination. fwiw, good luck, ray

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TimK

08-10-2000 06:52:01




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 Re: Piston sleeves in reply to Rick in Utah, 08-10-2000 04:42:23  
I think I'm not reading your question right. You said he wanted to "return the new sleeves...". Isn't he going to install your new sleeves ? Why not, and why does one sleeve slipping down have anything to do with the new sleeve and its fit in the bore unless you take out the old sleeve and try the new one ? Unless he's saying that the bore is too big for the sleeve, and that's why it's slipping. Frankly, I have never heard of the .090 sleeves slipping. Help, I don't understand the issue here.

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