Studs coming out of the Block -Were they Brass-in 1939-?

[mvair]

The 1936-48 Master Parts List indicates the parts shown in the picture are correct for 1936-1948. Since the master parts list shows superseded parts, that does not mean the same washers and nuts were used in 1939. You would need to check a 1939 parts list to verify.

Vintage Power Wagon does sell the brass washers. Iin fact, they sell a "kit" that includes all the washers, nuts and studs.? As you indicate the nuts and studs are garden variety and can be purchased elsewhere. The studs from Vintage Power Wagon are not exactly the same legnth as the originals, but they are what is available at most auto parts stores. You can see from my picture that I need to back one of the studs out 2 or three threads to appear origianal. There is plenty of threaded stud in the block that is not being used.

The flat washers that Vintage Power Wagon sells are not like the originals either. They are thin hardened washers and the outside diameter is slightly smaller than the originals. The flat washers in the picture are old stock. Everything else is from Vintage Power Wagon.

[TodFitch]

Here is a picture showing the different types of nuts and washers that were used on the manifolds.

Parts book for 1933 does not list the special conical brass washers used in later cars and shown in your photograph. I am not sure when they went to those. . . Maybe by 1939. Maybe not. Perhaps someone else on the forum knows this. And even if they are not authentic for 1939 they would be functional.

It is my understanding that those washers can be purchased through Vintage Power Wagon. The brass nuts can be gotten through a good hardware store.

[mvair]

Here is a picture showing the different types of nuts and washers that were used on the manifolds.

[12905]

Dennis:

Studs are steel; nuts are brass to eliminate rusting of steel nuts to steel studs and the resultant problem of breaking the nust free when it has been accelerated by the heat.

Brian

[DENNIS P NOLAN]

I have a '39 P-8 and have changed the exhaust manifold- I see that the nuts that bolted the exhaust manifold up to the block were brass-??/ was this because of the war at that time? was it because of a non-rusting concept?
It looks like the studs and the nuts were brass...any thoughts on this-?Thanks,Dennis