Super a manifold question

Claven2 · Aug 27, 2015

I just got this replacement manifold in the mail and had some question. The replacement has 2 threaded holes in the bottom with plug screws in them and two small holes drilled into the center hub of the manifold.

My old manifold is grungy and badly rusted, I can't tell with it on the tractor whether it has these features.

What do you guys think - is this normal for a super a manifold?

Chance M · Aug 27, 2015

That's for adding nitrous......😬

Claven2 · Aug 27, 2015

(quoted from post at 21:25:22 08/27/15)
That's for adding nitrous......😬

I've looked at photos of a few original ones online and the small holes are for drainage in case water/oil/gas gets into the exhaust stack.

Not sure what the threaded plugs are for, but they are in there gangbusters. I could not remove them with moderate effort (I stopped trying - they are probably loctited).

I haven't seen pics of an original with these plugs yet, but they don't look like they will cause harm...?

gene bender · Aug 27, 2015

Send it back those holes you do not want they are on the intake side or eithere seal them up tight or the engine probably wont even start.

Chance M · Aug 27, 2015

If the non threaded hole go all the way through then yeah...something went wrong.....but I think that is cast there for the machine that faced the mating surfaces could hold it precisely....could be wrong. They shouldn't go all the way through.

The threaded plugged holes, can't imagine their use, but yeah...they shouldn't harm a thing. They are in the intake side so they need be sealed good and tight always, which you have indicated they are a perm part of the manifold, haha. Gl

Chance

Andy Martin · Aug 27, 2015

I think you'll find those holes go into the exhaust and are indeed drain holes.

Claven2 · Aug 27, 2015

(quoted from post at 21:40:52 08/27/15) Send it back those holes you do not want they are on the intake side or eithere seal them up tight or the engine probably wont even start.

the un-threaded holes are on the exhaust side. The intake side are threaded and plugged well with plug screws. They seem solid...?

Here's an original IH manifold off a later Super A, it seems to have the un-threaded drain holes in the exhaust like mine does...?

Chance M · Aug 27, 2015

Ok, makes sense. The casting is beefy there to fit those ports.

Your all set then, get er mounted up!

Chance

Andy Martin · Aug 27, 2015

The threaded holes may be plugged casting holes like the "freeze plug" holes in automotive engines.

Claven2 · Aug 27, 2015

(quoted from post at 22:10:05 08/27/15) The threaded holes may be plugged casting holes like the "freeze plug" holes in automotive engines.

Maybe? Dunno. They were not mentioned in the ad. I got it from "reliableaftermarketparts" on e-bay.

Most of these sellers are using a generic external link photo of an aftermarket manifold, but what they are shipping is not identical.

Hopefully if will work. When I take the old manifold off, I'll sand blast it when I get over to my buddy's house and see if it's salvageable as a spare in case this new one lets me down. I have an extra gasket kit and some Permatex copper, just in case.

kub6040 · Aug 27, 2015

I think it will be fine , but if you don't like it send it
back and buy a good used one from me .

Andy Martin · Aug 27, 2015

I wouldn't be scared of the new one if it fits.

Curt Cooke · Aug 28, 2015

You'll be fine. The little holes are weep holes in the exhaust so that when you leave the machine outside without a cap on the muffler, the rain water can drain out and not get near a combustion chamber. The plugged holes are for vacuum access, likely no longer needed for anything. I think in days of old, vacuum was used in the cow milking parlor but it will take an older more experienced fellow to clarify that. That manifold may have other applications, like something LP gas fired and sometimes vacuum access is required for that equipment also.

gene bender · Aug 28, 2015

The fitting for the vacuum was rite above the flange where the carb fastens not where those on his are.

Curt Cooke · Aug 28, 2015

What could/would be done with vacuum created by the running engine? How much work could be done with that vacuum?
CC

gene bender · Aug 28, 2015

They ran the milking machines when there was an electric failure 70 or so yrs ago it was not uncommon to have a poweroutage so you put a fitingther and you could with the engine running stil run you milking machine to milk the cows you younger people dont understand early days of rural electric service.

charlieu · Aug 28, 2015

I remember Dad Milking cows using the H Farmall back in the early 60's when there was an ice storm and we had no electricity. Sure was better than milking by hand. If I remember correctly Dad only used one milking machine when using the H.

Claven2 · Aug 28, 2015

(quoted from post at 19:07:54 08/28/15) I remember Dad Milking cows using the H Farmall back in the early 60's when there was an ice storm and we had no electricity. Sure was better than milking by hand. If I remember correctly Dad only used one milking machine when using the H.

I put the new manifold on, seems to be fine, though I'm a few days of other work away from re-starting the tractor. I now know what the old manifold is so grungy, it must have been leaking a bit at the gasket. No way were the nuts on to 20 ft-lbs.

I have the old manifold removed, it's salvageable, but it needs sand blasting and I need to see if I can get the ratty old exhaust pipe out of it. It'll make a nice spare if this new manifold works out.

Lucas0522 · Aug 29, 2015

On the '48 Super AV I'm working on those holes you have in your new manifold are plugged. I can't tell if it's a rusted bolt head that's fused with the manifold or actually part of the casting. Just thought I would pass on something I noticed.

Claven2 · Aug 29, 2015

(quoted from post at 17:34:17 08/29/15)

On the '48 Super AV I'm working on those holes you have in your new manifold are plugged. I can't tell if it's a rusted bolt head that's fused with the manifold or actually part of the casting. Just thought I would pass on something I noticed.

Those ones look to me like someone plugged the drain holes with tapered steel pins or similar. Those spots are not where the casting spru locations are on my original IH manifold.

When I got my old one off, I got it cleaned enough to confirm the original has the same drain holes as the new one does. The only real difference are the threaded-in plugs on the intake side. And also, the original had gaps between each manifold flange, while the new one is monolithic. I doubt that makes much practical difference though.

Super a manifold question

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