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Farmall & IHC Tractors Discussion Forum
Show Parts for Model:

Replacing a Manifold

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Johnnykick

02-12-2018 12:49:01




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I need to replace the manifold on my 1955 Farmall 100. Someone told me the bolts are made of brass; is that true? Any tips would be appreciated as I don't want to break or strip any of the studs.




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SadFarmall

02-15-2018 03:36:32




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 Re: Replacing a Manifold in reply to Johnnykick, 02-12-2018 12:49:01  
I don't know much about Farmall 100 tractors, but my F12 and Farmall M both have brass nuts on the manifold studs.

SadFarmall



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mattofvinings

02-13-2018 05:09:05




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 Re: Replacing a Manifold in reply to Johnnykick, 02-12-2018 12:49:01  
My free advice is to get some Kroil, and spray it on the bolts every day for a week.

Use a 6 point impact socket and not a 12 pointer.

I try to crack the nut very slightly in either direction of tightening or loosening, cycling between. If I get the slightest relative motion either way I stop and douse it with some more Kroil, because there's now a new path for it to creep into.

If there's no-budgey then its time for the blue wrench to apply some heat, as mentioned.

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BarnyardEngineering

02-13-2018 04:53:21




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 Re: Replacing a Manifold in reply to Johnnykick, 02-12-2018 12:49:01  
Easy way to tell: magnet.

It's highly unlikely they're brass, but anything can happen.

I highly recommend having an oxy-acetylene torch on hand to heat the nuts before trying to loosen them. Just the nuts. If they don't come easy, don't pull harder on the wrench. You will twist the stud off. Ask me how I know. Instead, go through multiple heating/cooling cycles with the nut.



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steve706

02-12-2018 16:43:39




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 Re: Replacing a Manifold in reply to Johnnykick, 02-12-2018 12:49:01  
Never seen brass bolts on any off set Farmall. The 100ís take a grade 5, 3/8-16 x 1 1/4 hex head bolts for the manifold.



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gene bender

02-12-2018 14:42:31




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 Re: Replacing a Manifold in reply to Johnnykick, 02-12-2018 12:49:01  
Over the yrs ive had many off they have brass nuts and the thick washers in the middle. But you don't know whats been done with the engine since its only 60 or so yrs old I would spray some stuff on them wont hurt anything



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gene bender

02-12-2018 15:02:37




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 Re: Replacing a Manifold in reply to gene bender, 02-12-2018 14:42:31  
sorry I was thinking about the A,B and Cs



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rustred

02-12-2018 13:42:33




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 Re: Replacing a Manifold in reply to Johnnykick, 02-12-2018 12:49:01  
brass nuts used to be used on the chev exhaust pipe to manifold years ago. it was to prevent siezing. but i have never seen them used on these old tractor manifolds. there is nothing from factory on that using brass. make sure u have a flat washer though. usually the nuts have more meat on them than a standard nut. i usually use "never sieze" on my studs.



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gab

02-12-2018 13:24:24




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 Re: Replacing a Manifold in reply to Johnnykick, 02-12-2018 12:49:01  
Just a 123 engine isn't it, doubt if it has any bolts, brass or other wise, somebody might have told you to use brass nuts on the studs but doesn't seem necessary to me.



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