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Old 01-12-2024, 02:02 AM   #1
ajmac
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Default 59AB manifold vacuum banjo thread?

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.
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Old 01-12-2024, 03:39 AM   #2
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Default Re: 59AB manifold vacuum banjo thread?

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.

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Old 01-12-2024, 06:50 AM   #3
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Default Re: 59AB manifold vacuum banjo thread?

Thanks Mart. Keep up the videos, always great viewing!
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Old 01-12-2024, 08:21 AM   #4
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Default Re: 59AB manifold vacuum banjo thread?

Here. 1/2 inch wrench size.The one on the right was rounded so filed it to work with a 7/16" wrench
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Old 01-12-2024, 12:08 PM   #5
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Default Re: 59AB manifold vacuum banjo thread?

Quote:
Originally Posted by deuce lover View Post
Here. 1/2 inch wrench size.The one on the right was rounded so filed it to work with a 7/16" wrench
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Old 01-12-2024, 01:36 PM   #6
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Default Re: 59AB manifold vacuum banjo thread?

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Are you referring to the vacuum fitting behind and just below the carburetor base?
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Old 01-12-2024, 02:17 PM   #7
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Default Re: 59AB manifold vacuum banjo thread?

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.
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Old 01-12-2024, 02:22 PM   #8
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Default Re: 59AB manifold vacuum banjo thread?

Quote:
Originally Posted by 51woodie View Post
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.
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Old 01-12-2024, 02:46 PM   #9
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Default Re: 59AB manifold vacuum banjo thread?

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Originally Posted by ajmac View Post
Yes, that is the one.


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Old 01-21-2024, 01:13 PM   #10
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Default Re: 59AB manifold vacuum banjo thread?

I believe that it’s a 7/16-20 thread if my mind serves me right
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Old 01-21-2024, 01:16 PM   #11
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Default Re: 59AB manifold vacuum banjo thread?

Welcome aboard jmg54487.
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