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8N Cylinder Sleeves

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BNeal

06-21-2006 06:14:40

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Looking for suggestions -- I have an 8N (distributor behing fan), problem with one cylinder sleeve coming loose. I have replaced it once a few years ago; noe recently I could hear a "clicking noise" I feared was the sleeve coming loose again, and it did; must have broken up sleeve somewhat & started burning oil. I limped it home & now I'm about to replace it again. My IT book says heat up the block & instal the sleeve ( which I did before & it went OK). But there's only a very thin lip on the sleeve and I'm not very confident it will last this time either. I think the thickness of the head gasket may provide enough room for the sleeve to start to move again, but I don't know how to address this. Any suggestions are appreciated. thanks

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ZANE

06-21-2006 18:57:12

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Re: 8N Cylinder Sleeves in reply to BNeal, 06-21-2006 06:14:40

Clean the bore good with something like brake cleaner that leaves no residue.

Clean the new sleeve the same way on the OD.

Coat the outside of the sleeve with the red high temperature "Locktite" and the bore too. Smear it on with your hand.

Drive the sleeve in quickly with a proper driving tool.

I use an old Ford car axle that I cut off about a foot long and drove the lugs out to drive the sleeves in with. When the sleeve driver hits bottom that is where you want the sleeve to be. Even with the block deck.

It will stay. Next time you pull it out you will have to heat the sleeve top to bottom with an acetylene torch to remove it.

This ain't hearsay.

Zane

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Jerry Cent. Mi.

06-21-2006 15:01:53

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Re: 8N Cylinder Sleeves in reply to BNeal, 06-21-2006 06:14:40

It was very popular to remove the sleeves and install larger pistons.

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Kelly Jewell (KY)

06-21-2006 17:31:55

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Re: 8N Cylinder Sleeves in reply to Jerry Cent. Mi., 06-21-2006 15:01:53

Jerry, I suppose your referring to the .825 O.S. piston. Problem with sleeve removal is the casting of the block was not the same as the spin cast sleeve, and usually didn't last as long.

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Kelly Jewell (KY)

06-21-2006 08:15:42

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Re: 8N Cylinder Sleeves in reply to BNeal, 06-21-2006 06:14:40

Neal, the only way to correct your problem is to remove the block and take to a qualified machine shop and get a .005 oversize sleeve from Tisco or their sleeve supplier. If the shop has a CK-10 its very simple to do. They are availabe in both .040 wall thickness and .090 wall thickness. I just had this done on two sleeves that were loose. All this stuff you read about heat the block, freeze the sleeves leaves you guessing how tight the sleeve actually is. Install everything at the same temp and you will know....Kelly.

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Dan

06-21-2006 06:42:21

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Re: 8N Cylinder Sleeves in reply to BNeal, 06-21-2006 06:14:40

Your engine bore is probably worn enough to reduce the .005" interference fit required to keep the sleeve in place. A new head gasket will help for a short time, but will eventually fail in the same place. Your top lip will continue to chip away will it breaks, and the sleeve will end up in pieces in your oil pan - meaning very possibly a destroyed engine at this point.

Your early 8N originally had thin steel sleeves (.045"), if it still has this type you can bore the engine out to accept the thicker .090" cast iron sleeves (recommended) and your problem will be fixed. Or, one of the better Ford mechanics on this board, Zane, has recommended mixing a two part high temp epoxy but use half of the hardener and smear this on the outside of the new sleeve and install. Either way, you need to fix this issue quickly.

Good luck,
Dan

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