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 Post subject: Manifold Vacuum Port
PostPosted: Thu May 10, 2018 8:02 pm 
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4 BBL ''Hyper-Pak''

Joined: Thu Sep 08, 2016 3:00 pm
Posts: 41
Location: Chicagoland
Car Model: '69 Coronet, 1980 Volare Wagon
Anyone know where I can find a replacement manifold vacuum takeoff fitting/port? I have it as PN 4094 872 in my 1979 parts book. Appears to have a 5/8 diameter thread and at least three vacuum line connections—one to brake booster, one to cabin and one other. It’s the other one that the PO broke off and replaced with a piece of brake line held in by some sort of (now-failed) sealant, causing a vacuum leak. Thanks in advance.


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 Post subject: Re: Manifold Vacuum Port
PostPosted: Fri May 11, 2018 5:51 am 
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Supercharged

Joined: Wed Sep 17, 2008 6:48 pm
Posts: 3805
Location: Indianapolis
Car Model:
maybe go to Lowes, from the plumbing-hardware section, a short pipe connector, a couple of T's and three barbed fittings, you have a workable vacuum tree, much more robust than the fragile pot metal OE vacuum tree.

if you want something more standard in appearance, at e bay for not much money

https://www.ebay.com/itm/Universal-6-Po ... Swc3ZUpopf

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 Post subject: Re: Manifold Vacuum Port
PostPosted: Tue Jun 19, 2018 7:50 pm 
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4 BBL ''Hyper-Pak''

Joined: Thu Sep 08, 2016 3:00 pm
Posts: 41
Location: Chicagoland
Car Model: '69 Coronet, 1980 Volare Wagon
Update on this—went with a 3/8 barb x 3/8 MIP brass adapter for the brake booster vacuum source. This knocked out the small vacuum line to the heater control box but my manifold has a second port for some long-disconnected sensor so I’m going to try a 1/4 barb x 3/8 MIP in that spot to feed the heater box.


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 Post subject: Re: Manifold Vacuum Port
PostPosted: Wed Jun 20, 2018 8:27 am 
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TBI Slant 6
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Joined: Sun Aug 14, 2016 5:52 pm
Posts: 171
Location: SW Washington
Car Model: 66 Valiant, 82 D150, 94 Ram 2500 TCD, 69 Dart
If your two adapter fix doesn't work right, I think I have one of these fittings on my 82 D150 that I will not be using. Shoot me a PM if you wish to discuss.


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 Post subject: Re: Manifold Vacuum Port
PostPosted: Wed Jun 20, 2018 9:03 am 
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Board Sponsor & Moderator
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Joined: Mon Oct 21, 2002 11:08 am
Posts: 16451
Location: Blacksburg, VA
Car Model:
Is this the cause of your hissing from the other int/exh manifold thread?? Could very well be.

Lou

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 Post subject: Re: Manifold Vacuum Port
PostPosted: Thu Jul 05, 2018 8:41 am 
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4 BBL ''Hyper-Pak''

Joined: Thu Sep 08, 2016 3:00 pm
Posts: 41
Location: Chicagoland
Car Model: '69 Coronet, 1980 Volare Wagon
Thanks Lou. Turns out the primary source of hissing was from an EGR block-off that was first loose and later cracked. I replaced that and the car runs much better--although I still suspect a small leak at the vacuum ports on the #6 intake runner.


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