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Ford 9N, 2N & 8N Discussion Forum
Show Parts for Model:

Re: .040 sleeves from TISCO

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TheOldHokie

01-31-2013 09:47:27
108.22.203.84



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Bulldozer said: (quoted from post at 12:54:37 01/31/13) Would not even consider replacing the .04" wall sleeves with new .04" wall sleeves.

Jason indicated in his You Tube video the new .04" sleeves needed honing to size for the new pistons which came in the kit. The pistons would not even slide through the sleeve.

My .09" wall TISCO sleeves also required honing even after boring the block the correct size for the sleeves.

Proper engine rebuilding requires honing the new sleeves to correct size.

Understand hammering out old sleeves and pounding to in new sleeves to be shade tree mechanics but was common for the era.

Problem is the manufacturing tolerances on the foreign made TISCO .04" & .09" wall sleeves is so loose,

honing to size is required, unless you are extremely lucky on the draw of the cards

(sleeves).


Well I can only say my customers must be unusually lucky card players. One called me just yesterday to comment on this thread. He recounted how easy and simple it went for him a little less than a year ago when he replaced his factory .040 sleeves with nothing more than the TISCO .040 sleeves/pistons and one of my OEM style toolkits. He drove the old ones out with the removal tool and the new ones in with the installation tool just as shown in the Ford shop manual. No damaged sleeves and the proper piston clearance with no machining, no honing, no fuss. Just one of many lucky customers who have done it the "old fashion shade tree" way. I've lost count of how many of those tool kits I have sold to "lucky" customers but it's got to be getting close to 100.

Go back through this thread and you will see Jason indicated in his followup to my questions that the piston/sleeve fit on his TISCO parts appeared to be fine when they were unpacked from the box. The pistons fit through the bore in the sleeves fine until AFTER the machine shop installed the sleeves in the block. I wonder how that happened. :roll:

I''d love to stay and chat but I've got work to do in the shop - I have another half-dozen customers waiting on their toolkit orders....

TOH


This post was edited by TheOldHokie at 11:31:10 01/31/13.

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Bulldozer

01-31-2013 21:24:48
24.165.92.6



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 Re: .040 sleeves from TISCO in reply to TheOldHokie, 01-31-2013 09:47:27  
The sleeves may have the correct piston clearance in an unstressed state.

However, when the sleeves were installed with the impact driver or shop pressed, the sleeve ID decreases as a result the interference fit with a resulting hoop compression stress in the sleeve wall.

Have seen some videos on You Tube where the there is no interference fit on the N series engine and the new sleeves just drop into the bore and have to be secured with a special Locktite sleeve adhesive.

If the interference fit is excessive the installer may run the chance of cracking the block using an impact driver.

It was not clear from Jason's You Tube video on his 9N engine rebuild ,if he installed the sleeves with the impact driver tool or the machine shop pressed the sleeves into the block.
The episodes that cover this sleeve issue are #10 & #12, ...could not find an episode #11.
According to the video the new pistons would not slide throught the newly installed sleeve(s) without honing to size.

It is more difficult to hone a steel sleeve than a cast iron sleeve or cast iron block.

Since there is a wide variation, .005" ,in the sleeve OD from my own experience, some sleeves compress more in ID than others. If the purchaser is "lucky" and has a .001" interference fit on all the sleeves the piston will probably have acceptable clearance without have to perform a honing procedure.
Also, the original block bore has a manufacturing tolerance.

What do expect for cheap foreign $150/ 4 piston-sleeve set, ...tight tolerances?
Again, if you get lucky no honing is required.

Have rebuit dozens of engines of all types with sleeves, including outboard engines which have a habit of melting pistons and throwing pieces of steel rings. Each rebuild required honing the sleeve to fit the piston , properly with the correct clearance.

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