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

9n motor

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hankviii

07-26-2014 20:09:45
66.87.90.129



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Rebuilding my 9n. Pulled everything apart and bought a rebuild kit from YT.com. Problem is my old sleeves have no shoulder on top and the outside diameter is ten thou larger than the new ones. What do I do now? Thanks for any info.

Seth




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hankviii

07-29-2014 16:57:53
66.87.115.0



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 Re: 9n motor in reply to hankviii, 07-26-2014 20:09:45  
[quote="TheOldHokie"](reply to post at 05:10:54 07/28/14) [/quote

How do you know if your pistons/rings are too small for the sleeve?



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mhb@ufe

07-27-2014 11:30:22
74.75.194.4



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 Re: 9n motor in reply to hankviii, 07-26-2014 20:09:45  
Most likely a machine shop bored the engine and installed generic sleeves instead of using original size replacement sleeves.

Mark



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Royse

07-26-2014 20:33:56
69.36.49.186



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 Re: 9n motor in reply to hankviii, 07-26-2014 20:09:45  
What are the measurements on your sleeves/bores?

I'm just wondering if you can use .090 sleeves.



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hankviii

07-27-2014 05:33:41
66.87.90.129



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 Re: 9n motor in reply to Royse, 07-26-2014 20:33:56  
That is what I purchased. I called tisco to confirm part numbers. Thanks



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TOM N MS

07-27-2014 05:43:05
172.6.29.244



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 Re: 9n motor in reply to hankviii, 07-27-2014 05:33:41  
Tisco??? Could be the problem....Like Royse said, please share tell us the measurements of bores and sleeves..



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hankviii

07-27-2014 16:37:40
66.87.90.183



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 Re: 9n motor in reply to TOM N MS, 07-27-2014 05:43:05  
My old sleeves have an OD of 3.377

New sleeves from tisco have an OD of 3.367

My bore measures at 3.373. Is that not standard for a 9n unsleeved bore? My serial number appears to be 9NT98487. Thanks



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TheOldHokie

07-28-2014 05:10:54
71.176.191.127



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 Re: 9n motor in reply to hankviii, 07-27-2014 16:37:40  

hankviii said: (quoted from post at 19:37:40 07/27/14) My old sleeves have an OD of 3.377

New sleeves from tisco have an OD of 3.367

My bore measures at 3.373. Is that not standard for a 9n unsleeved bore? My serial number appears to be 9NT98487. Thanks


The nominal OEM cylinder bore on the N-series is 3.1875.

With .040 wall sleeves the nominal block bore is 3.1875 +.040 +.040 = 3.2675

With .090 wall sleeves the nominal block bore is 3.1875 + .090 + .090 = 3.3675

Your block bore is nominally .005 over stock .090 wall replacement sleeves. You can get .005 over sleeves that MAY work but you are dealing with an interference fit of .001 and on something non-standard like this there is always the chance that the interference fit will be loose. I don't know what YT's policy is on returning them if they will not work and at $42 each it's a $175+ investment. IMO your best bet is to take the block to a machine shop and let them fit custom sleeves.
Oversize Sleeves @YT

TOH
This post was edited by TheOldHokie at 06:29:10 07/28/14 2 times.

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Tall T

07-27-2014 16:52:03
24.108.0.163



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 Re: 9n motor in reply to hankviii, 07-27-2014 16:37:40  
Can one buy a .010 oversized O.D. sleeve

or does one have to bore again to accommodate an available oversize?



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