59AB manifold vacuum banjo thread?

[ajmac]

Hi All,
Could someone tell me the UNF thread in the inlet manifold for the banjo bolt that connects the distributor vacuum pipe to the manifold please. It’s bigger than 1/4” if I recall. I am away from the engine and want to buy an adaptor to fit a vacuum gauge for testing.

 

[Mart]

If you are referring to the small connections along the edge of the manifold between two adjacent ports, they are 3/8" UNF. They take a specific oliveless tapered nut.

Mart.

 

[ajmac]

Thanks Mart. Keep up the videos, always great viewing!

 

[deuce lover]

Here. 1/2 inch wrench size.The one on the right was rounded so filed it to work with a 7/16" wrench

 

[petehoovie]

Here. 1/2 inch wrench size.The one on the right was rounded so filed it to work with a 7/16" wrench

 

[Kube]

Are you referring to the vacuum fitting behind and just below the carburetor base?

 

[51woodie]

Is this the one you are looking for? On my 59AB there is a "silencer", not a banjo bolt that the vacuum line for the wipers connects to.

 

[ajmac]

Is this the one you are looking for? On my 59AB there is a "silencer", not a banjo bolt that the vacuum line for the wipers connects to.

Yes, that is the one.

 

[petehoovie]

Yes, that is the one.

 

[Jmg54487]

I believe that it’s a 7/16-20 thread if my mind serves me right

 

[Zeke3]

Welcome aboard jmg54487.

 

[41SupDelux]

I'm going to jump on this thread and ask petehoovie if he knows where to get this fitting. Mine cracked in half (porosity in the casting...) and I can't find a replacement. Otherwise I'll have to weld something together with a banjo bolt.

 

[26 lakes]

Here are some pictures of the parts.

 

[26 lakes]

Here is a picture of the other end,

 

[Newc]

Napa has the small brass fitting- Ford flare nut. Newc