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| Manifold Vacuum Port https://slantsix.org/forum/viewtopic.php?t=62324 |
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| Author: | SpeedBanana1977 [ Thu May 10, 2018 8:02 pm ] |
| Post subject: | Manifold Vacuum Port |
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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| Author: | DadTruck [ Fri May 11, 2018 5:51 am ] |
| Post subject: | Re: Manifold Vacuum Port |
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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| Author: | SpeedBanana1977 [ Tue Jun 19, 2018 7:50 pm ] |
| Post subject: | Re: Manifold Vacuum Port |
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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| Author: | halfafish [ Wed Jun 20, 2018 8:27 am ] |
| Post subject: | Re: Manifold Vacuum Port |
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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| Author: | Dart270 [ Wed Jun 20, 2018 9:03 am ] |
| Post subject: | Re: Manifold Vacuum Port |
Is this the cause of your hissing from the other int/exh manifold thread?? Could very well be. Lou |
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| Author: | SpeedBanana1977 [ Thu Jul 05, 2018 8:41 am ] |
| Post subject: | Re: Manifold Vacuum Port |
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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