Anybody got brass nuts?

[HalfdollarMayflower]

...on your intake manifold?

Took off my manifolds the other night and I noticed that the exhaust manifolds were held fast with split-end acorn nuts, while the intake used brass nuts. This is on a 1950 P20 motor. The manifolds don't appear to have been taken off, the gaskets have the DCPD logo...was it common practice to hold the intake on with brass nuts?

[TodFitch]

All the manifold stud nuts on the 1933 version of the engine were brass. Seems like there is a special nut and washer used on the exhaust in later days. Not sure about the intake stud nuts.

[james curl]

I still use brass exhaust pipe to manifold nuts, they are longer than standard steel nuts. I have never encountered any problems when removing them or installing them. Good auto parts stores stock brass exhaust nuts so you should be able to buy some..

[Plymouthy Adams]

the use of the brass nuts allow you to tighten the manifold without snapping a stud..the brass is soft that if over torqued should strip out the threads of the nut protecting the stud..also it does not promote rust siezing..refrain from using stainless steel here, though the rust issue may be eliminated, the stainless is very easy to gall and sieze if over torqued. not every store will have brass nuts on hand..not sure about it but the tractor supply/parts place in your area (not TSC but like a JD/Massy etc) may have these on the shelf

[windsor8]

Brass nuts on fender fastens on my D 24.

[oldmopar]

As others have stated a old hardware store or good auto parts should have them. VPW has them but not inexpensive at $8.00 for 4 nuts. Scroll down to the last page

http://www.vintagepowerwagons.com/pdf/parts/01engine.pdf

[greg g]

The manifold torque specs are pretty low, and since there are several different masses of castings involved, the brass fasteners also allow for things to move slightly as they go through the many heating and cooling cycles those pieces and the block go through.

snug and centered on the studs but not over tightened which would promote cracking, with the built in anti sieze brass provides.

[JIPJOBXX]

When I worked for the navy they used in some places brass nuts. But on one occasion as I remember one of ships in the fleet had a steam valve blow apart and killed some sailors because someone has misidentified brass nuts for heavy duty steel nuts. If you have a Lowes in your area they should have the nuts your looking for

Why did they use brass nuts? I think because they are farious material and will not deteriorate. Other than that you could us stainless steel or something like that?

[Troganin]

Why did they use brass nuts? I think because they are farious material and will not deteriorate. Other than that you could us stainless steel or something like that?

Brass is non-ferrous meaning that it does not contain an appreciable amount of iron. Brass would be better in low torque aplications, as stated prevously, for its built in anti seze qualities.

[blueskies]

The split brass nuts also have a tapered end, that fits into a special recessed washer...

Pete

[grey beard]

When I worked for an IH factory branch shop years ago, every engine - gas or diesel - used brass nuts on the exhaust pipe flange bolts. They even came along with engine gasket kits. We were told they were used because they never sieze. Sure seems like a good idea to me, because normal anti-sieze compounds cannot be used on these high temp applications.

[Don Coatney]

When I worked for an IH factory branch shop years ago, .

What shop did you work for? I worked at the IH Truck Sales Processing Center (TSPC) in Fort Wayne, Indiana in the 60's.

[BobT-47P15]

I seem to recall something about a brass monkey.

[Don Coatney]

I seem to recall something about a brass monkey.

I wonder how long it would be before this thread got hyjacked:rolleyes:

[BobT-47P15]

Ahhh....not hijacked, just a quick jump off the track.

We now return you to regular programming.

Regarding the topic.....I haven't removed a manifold lately, but doubt if

any of mine have the aformentioned type nuts. I think we were going to

use brass ones on the exhaust pipe bolts when attaching to the manifold

of the coupe. They did cost extra at the local nut-n-bolt store.