Brass exhaust manifold nuts

[Lawson Cox]

Me again, looking for 6 or 8 5/16 x 18 tall brass exhaust manifold nuts for the display engine. I need them to be about .320 tall, as original. I cannot locate them anywhere in stores or on the web. All I can find are the thin ones. I think I can salvage 4 or 5 of the ones that were on the engine, but that's all. Anybody have some? Thanks, as always. Lawson

[deuce lover]

Was that a V8 60 thing? Brass nuts? I thought that they were bolts or cap screws that secured the manifolds to the block?

[PeteVS]

Dorman has exhaust stud kits that come with long brass nuts. I don't know about 5/16" threads but they do have them in 3/8" and 10mm. (Don't ask why I know about the 10mm.)

McMaster has them as coupling nuts. Pricy but long enough that you should be able to cut them in half.
https://www.mcmaster.com/nuts/materi...type~coupling/

[Oldtmtech]

Extra wide and coupling nut

[Terry,OH]

So many?

[Kube]

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Originally Posted by deuce lover

Was that a V8 60 thing? Brass nuts? I thought that they were bolts or cap screws that secured the manifolds to the block?

That was a 60HP thing.

Lawson, did you ask Driskell?

[deuce lover]

Thanks Kube. Learned something.

[Kube]

I have no idea why Ford used studs and nuts on the 60HP engines.
Six studs (352675-S) were threaded into each side of the engine block and six hex head brass nuts (350980-S) attached the manifolds to the engine block.

[Lawson Cox]

Originally Posted by Kube

That was a 60HP thing.

Lawson, did you ask Driskell?

Yes, many times, mostly through notes to him on his web page. He has generously donated quite a few things, but he had to get 12 to 15 cars ready for the V8 National. Last contact was about 3 weeks before the National and he said it would be "a while" before he could get the order out. I told him that would not be a big problem.

He is a very busy man. I got him on the phone once and was able to get in a very short chat with him. He got at least 4 calls in rapid succession while I was on the phone, which he put on hold while we spoke briefly. No word since the National.

I'm at a point now where I am dead in the water until I get more small parts like nuts, bolts and fuel and vacuum lines that I have on order.

One question Kube. Should I leave the aluminum parts "raw", or would it help keep them pretty longer to clear coat them? Most observers would be unaware. The aluminum parts look good both ways and this isn't a "formal show engine".

Thanks for all your interest and help, Kube.

[Lawson Cox]

Originally Posted by Terry,OH

So many?

Yeah, Terry. There are three points on each exhaust manifold where it mates to the engine block, each requiring 2 tall brass nuts. That would be 6 nuts on each side and 12 total.

I don't think brass exhaust exhaust manifold nuts was just a 60HP thing as suggested by Kube. I don't believe I have ever seen an exhaust manifold nut that wasn't brass, on vintage Fords and Dodges at least. Brass won't seize on hot manifold bolts like steel.

[Kube]

Originally Posted by Lawson Cox

Yeah, Terry. There are three points on each exhaust manifold where it mates to the engine block, each requiring 2 tall brass nuts. That would be 6 nuts on each side and 12 total.

I don't think brass exhaust exhaust manifold nuts was just a 60HP thing as suggested by Kube. I don't believe I have ever seen an exhaust manifold nut that wasn't brass, on vintage Fords and Dodges at least. Brass won't seize on hot manifold bolts like steel.

Lawson, On the 85 and 95 Hp engines, studs were installed in the block and steel hex nuts with washers were utilized to secure each manifold to the block.
The 60HP engine, as I'd noted in a previous post, utilized brass nuts over the block studs.
The manifold TO exhaust pipe studs utilized brass nuts on all engines.

[Lawson Cox]

Originally Posted by Kube

Lawson, On the 85 and 95 Hp engines, studs were installed in the block and steel hex nuts with washers were utilized to secure each manifold to the block.
The 60HP engine, as I'd noted in a previous post, utilized brass nuts over the block studs.
The manifold TO exhaust pipe studs utilized brass nuts on all engines.

Gotcha, I think. LOL

[Scott52]

I remember that Chevrolet uses tall brass exhaust nuts but I checked and they are 3/8. Looked on google for 5/16 brass exhaust nuts and found different choices. Dorman probably has some.

[Ken/Alabama]

Grainger has a 5/16 x18 brass coupling nut listed. They are 7/8” long so you should be able to get two outta one.

[Mart]

I've never seen a conventional flatty with studs.
Only the French motors. Which use brass nuts, by the way.

Did the early motors use studs where the exhaust attaches over the front port?

[cas3]

I have to agree with Mart, never seen studs for mounting exhaust manifolds to the block

[Lawson Cox]

The 60HP I'm restoring has studs for the exhaust manifolds, with brass nuts. No way to tell if it started out that way. Something in the back of my slowly deteriorating mind says that the 60HP engines were all built across the pond and shipped here. Have I totally lost it on this point? Or, who knows what has happened to this block in its 84 year life span? I can only say it looked very clean top and bottom and I believe ot has its original pistons because the pistons have NO markings or numbers on them to indicate they are oversize.

[38 coupe]

I remember reading (I think it was a Dave Cole article in the V8 Times) that all 60 horse motors were built in the Dearborn factory, at least up to 1940. The initial versions were shipped across to Europe during 1935 and 1936 and had four main bearings. I'll see if I can find the article (V8 Times PDFs here I come).


Edit: found an article (not the one I was looking for, but for this purpose just as good). November / December 1987 V8 Times starting on page 34. The initial V8 60 engines were made in the Dearborn plant. However, French production started up and were making engines on the continent. I have not yet found reference to when / if English production of V8 60 engines occurred.

[Rodrelic]

I sprayed all my aluminum stuff with clear engine paint. Yes would yellow with time but I prefer that to the corrosion, “chalky” look that would absorb grime.

[Terry,OH]

According to the 38 hardware book 350980-S is 5/16-18 thread but they do not list the length or hex size. The Chassis parts book list it as 21/64 hex & 1/2" long, but I have my doubts on the hex size. If you have one of the nuts and can add dimensions maybe they can be made.