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Sleeves and .030

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Ray md.

02-14-2001 13:54:16

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1950 N with lots of smoke/started teardown and saw .030 on pistons. Whould the sleeves probably be
cast iron ? I do not see .030 listed for 8N in any of the parts order books? Thanks to all for a great board.

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Tom WY

02-14-2001 19:54:53

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Re: Sleeves and .030 in reply to Ray md., 02-14-2001 13:54:16

I DO NOT recommend going sleeveless! Especially if you are going to "keep" the tractor. Mine was run without sleeves, and last year I paid the machine shop plenty to have the block bored, then counter bored to fit thick wall sleeves into my originally thin sleeved 2N.
When I started this rebuild, it was REAL CLOSE to being a boat anchor.

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ZANE

02-14-2001 15:32:51

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Re: Sleeves and .030 in reply to Ray md., 02-14-2001 13:54:16

If it has sleeves it will be obvious.

I have bored many .090 sleeves .030 and even .040. It is lots easier than pulling and installing sleeves and at the time I had a boring bar and the cost was the same. Even gives a minute amount more compression if that makes you feel better. (Really can't tell the difference in performance)

If their is not much of a ridge at the top of the sleeve you may be able to just re-ring the engine and be good to go.

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JHEnt

02-14-2001 17:22:28

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Re: Re: Sleeves and .030 in reply to ZANE, 02-14-2001 15:32:51

I'm not sure what you mean when you say you bored .090 over sleeves. If you were boring the original sleeve .090 over then you would have no sleeve. Ford used to sell .090 over pistons as a cheap rebuild. These pistons would run in the original block bore with the sleeve removed. This would only work once since the engine block was soft and the piston would cut deeply into the block. I have fixed a couple of these but only by having a machine shop rebore the block and then insert sleeve stock which is then bored to original ID to allow regular sized pistons to run in them.

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Ray to Zane

02-14-2001 15:54:12

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Re: Re: Sleeves and .030 in reply to ZANE, 02-14-2001 15:32:51

Thanks Zane, I'm feeling better already. Will
check that ridge tomorrow.

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Dell (WA)

02-14-2001 14:55:56

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Re: Sleeves and .030 in reply to Ray md., 02-14-2001 13:54:16

Ray..... .check real carefully, always the possibility that the last "rebuilder" used NO SLEEVES and an 030 oversized Merc piston for a slight displacement increase and more horsepower.

You may have to "mike" the cylinder bores as a double check. I believe the standard bore piston fits eather thin steel sleeve or thicker castiron sleeve.

Problem with runnin' bare bored is once you bore out the block to fit the available piston, you're in deep doo-doo if you need to re-sleeve or re-bore cause nuttin' fits..... ..Dell

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Ray to Dell

02-14-2001 15:04:55

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Re: Re: Sleeves and .030 in reply to Dell (WA), 02-14-2001 14:55:56

Thanks Dell, it did throw me off and those are
great tips. Will proceed and let the chips fall.

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Claus

02-14-2001 14:05:01

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Re: Sleeves and .030 in reply to Ray md., 02-14-2001 13:54:16

Usually, one does not put oversized pistons into a sleeved engine. Obviously, it would be kind of difficult to bore out .040 steel sleeves. Perhaps they had ..090 ci sleeves.
Happy Motoring
Claus

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Nolan

02-14-2001 17:41:47

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Re: Re: Sleeves and .030 in reply to Claus, 02-14-2001 14:05:01

Kinda depends on the engine. Aluminum motorcycle engines and outboard motors frequently get their sleeves bored out and oversized pistons put in. Never having attempted to pull the sleeve out of either of those types of engines, I'd suspect it's because of difficulties with pulling the sleeve from an aluminum cylinder.

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Claus

02-15-2001 06:41:16

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Re: Re: Re: Sleeves and .030 in reply to Nolan, 02-14-2001 17:41:47

Well, we are talking about tractor engines and unless you happen to have a machine shop, or back in the war days when one could not get parts, or machinists worked for peanuts, it is not economically sound practice to bore sleeves. The machine setup cost is probably more today than the cost of the sleeves. That is why I said "Usually"
Happy Motoring
Claus

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Brad

02-14-2001 21:24:13

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Re: Re: Re: Sleeves and .030 in reply to Nolan, 02-14-2001 17:41:47

A lot of aluminum blocks have the block cast around the sleeve. With the different rates of expansion between the two metals it would be hard to keep the sleeves in place if they weren't.

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