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Old 02-21-2015, 06:22 PM   #1
tucsonjwt
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Mysterious Nipple

Does anyone know what the this nipple on the back of the intake manifold on my 83 C20 454 is supposed to connect to? I have a short vacuum hose that is coming from a Tee after a small vacuum valve that is blocked off and not connected to anything. I think there might be some sort of device that is supposed to go there. Thanks.
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Old 02-21-2015, 06:32 PM   #2
Slammed84
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Re: Mysterious Nipple

I love mystery nipples!
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Old 02-21-2015, 07:28 PM   #3
Titomars
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Re: Mysterious Nipple

Quote:
Originally Posted by tucsonjwt View Post
Does anyone know what the this nipple on the back of the intake manifold on my 83 C20 454 is supposed to connect to? I have a short vacuum hose that is coming from a Tee after a small vacuum valve that is blocked off and not connected to anything. I think there might be some sort of device that is supposed to go there. Thanks.
That looks like the factory nipple for a vacuum modulator line (automatic). Is your truck a stick? if it is not being used you can use it for anything that needs a manifold vacuum source.
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Old 02-21-2015, 07:38 PM   #4
DPowers
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Re: Mysterious Nipple

ha ha you said nipple...
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Old 02-21-2015, 09:34 PM   #5
notallthere
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Re: Mysterious Nipple

That is where my transmission hooks up for the vacuum modulator.
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Old 02-21-2015, 11:07 PM   #6
tucsonjwt
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Re: Mysterious Nipple

I have a stick, so I guess I don't need another nipple.
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Old 02-21-2015, 11:51 PM   #7
ray_mcavoy
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Re: Mysterious Nipple

Another nipple ...
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Old 02-22-2015, 12:07 AM   #8
enaberif
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Re: Mysterious Nipple

Surgically remove the nipple and graft in a pipe plug if it bothers you that much.
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