Straight 8 manifold stud size??

[sjaakslinger]

Does anyone know what size studs were used on the Chrysler straight 8 manifolds?

 

Length and thread sizes?

 

Thanks.

 

Dennis

[chrysleritis]

1946-48 Parts Book says for 8-cylinder engines: 

 

Part # 51561

STUD, Manifold (heat-treated and cold-drawn S., 3/8"-16(1/2") x 1 11/16" x 3/8"-24(5/8") ) 

quantity 16 for the 8 cylinder engines

 

Also gives:

MANIFOLD, Exhaust rear, part # 654785 

Attaching Standard Part:

part # 149510

Stud, S., cd-pltd. [steel, cadmium-plated], 3/8"-16(9/16") x 1 3/16" x 3/8"-24(5/8")

quantity 1 for the 8 cylinder engines

 

 

Edited Wednesday at 05:47 PM by chrysleritis

[sjaakslinger]

Thanks a lot!

[andyd]

If you are having a problem finding manifold studs that have BOTH the UNF and UNC thread on the same stud as I did here in Australia I ended up getting grub screws or studs the correct length(1 & 1/4" and 1 & 1/2")  albeit only with the UNC thread all the length but instead of $9.00 each with the 2 different threads the UNC threaded stud was $1.50 each which meant that they screwed into the head or block in your case and just used a normal UNC nut to hold the manifold on.........as I needed 16 studs the price difference was $24 against $144........guess what I chose?........andyd 

[sjaakslinger]

54 minutes ago, andyd said:

If you are having a problem finding manifold studs that have BOTH the UNF and UNC thread on the same stud as I did here in Australia I ended up getting grub screws or studs the correct length(1 & 1/4" and 1 & 1/2")  albeit only with the UNC thread all the length but instead of $9.00 each with the 2 different threads the UNC threaded stud was $1.50 each which meant that they screwed into the head or block in your case and just used a normal UNC nut to hold the manifold on.........as I needed 16 studs the price difference was $24 against $144........guess what I chose?........andyd 

Thanks for the tip!

[Plymouthy Adams]

most any hardware store will have these studs in stock....question is will they have enough.  Good news is there is usually more than one hardware store in most average sized towns.   I replaced the studs as JUST BECAUSE last engine I prepped....local store hand what I needed...oh, for sure a few cents more but you not waiting for the postman to run either.  Never in my life have I had the coyote's (Wiley) great mail order service.

[andyd]

Plymouthy.........your hardware stores must be MUCH better than those here in Oz.....lol....the local 2 hardware stores wern't worth jack ****..........lol.....only metric crap and the 6 auto parts stores wern't much better.......the specialised Bolt & Engineering shop could get the studs with the 2 threads but at $9.00 each I decided to just get the single UNC threaded allen keyed ended studs or grub screws from them which as stated were only $1.50 each.........they worked fine..........andyd