Vacuum fitting on manifold - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chevyrides · 11-05-2021, 07:04 PM

My manifold is missing the fitting for the brake booster hose shown in photo. Can you buy that fitting? My son has one on a manifold that I was going to try borrow. I tried remove it but it didn't want to come out. It will spin easily and move a little bit, I didn't want to try too hard and break it. Has anyone removed this fitting?

**Thealien** · 11-05-2021, 09:05 PM

You can buy those or find one in a junk yard. It is a typical push loc type fitting. To get one out of a manifold you push the red ring and pull on the fitting.

chevyrides · 11-05-2021, 11:20 PM

Thanks for the reply, I would like to remove the fitting that has the red ring, that is the part I'm missing

chevyrides · 11-05-2021, 11:29 PM

This is the part here.

**Thealien** · 11-06-2021, 06:10 AM

I am not 100% sure but I believe that is part of the manifold and if it is missing I believe you need a whole manifold? Do you have a picture of your manifold in that location?

chevyrides · 11-06-2021, 10:37 AM

Quote:

Originally Posted by Thealien

I am not 100% sure but I believe that is part of the manifold and if it is missing I believe you need a whole manifold? Do you have a picture of your manifold in that location?

I can't really get a picture of the manifold in that location, it fairly tight up against the firewall. In the picture of my sons manifold above it looks like it's part of the manifold but it's not I can freely turn it by hand. After it was installed at the factory it was probably not meant to be removed. I think you may be right and would have to replace the manifold if I want that fitting. I wish I noticed it before I installed the motor, it would have been way easier to deal with. I will see if the hole in the manifold is close to one of the pipe tap thread sizes if not I will have to turn something in a lathe and glue it in.

Thanks for the help

Davidf · 11-06-2021, 06:39 PM

Or, cut off the fitting, Drexel/grind the fitting out of the manifold. Then tap manifold for barbed brass fitting

95 S_Trucker · 11-07-2021, 07:42 AM

You can install a plug or a hose fitting into that hole. Here’s a video.

https://m.youtube.com/watch?v=eE0z4pRfHLo

**Thealien** · 11-15-2021, 07:09 PM

Quote:

Originally Posted by 95 S_Trucker

You can install a plug or a hose fitting into that hole. Here’s a video.

https://m.youtube.com/watch?v=eE0z4pRfHLo

He is missing the whole part that red ring is a part of. Never seen that.

solidaxel · 01-01-2022, 02:44 PM

I'm looking for a solid plug
I think you are right the red locking ring is part of the intake, BUT it does move so maby there is locking tab like the fuel line connection! !small tool!

11-05-2021, 07:04 PM	#1
chevyrides Registered User Join Date: Apr 2018 Location: Campbell River, BC Posts: 7	Vacuum fitting on manifold My manifold is missing the fitting for the brake booster hose shown in photo. Can you buy that fitting? My son has one on a manifold that I was going to try borrow. I tried remove it but it didn't want to come out. It will spin easily and move a little bit, I didn't want to try too hard and break it. Has anyone removed this fitting?

11-05-2021, 09:05 PM	#2
Thealien Senior Member Join Date: Jun 2007 Location: Pine Ridge Florida Posts: 4,135	Re: Vacuum fitting on manifold You can buy those or find one in a junk yard. It is a typical push loc type fitting. To get one out of a manifold you push the red ring and pull on the fitting. __________________ Click on my Not really a build thread, yet NOT SO RUST FREE RUST FREE BLAZER LS ENGINE SWAP INFORMATION THREAD BOLT RESTORATIONS 4l60 to an NP205

11-05-2021, 11:20 PM	#3
chevyrides Registered User Join Date: Apr 2018 Location: Campbell River, BC Posts: 7	Re: Vacuum fitting on manifold Thanks for the reply, I would like to remove the fitting that has the red ring, that is the part I'm missing

11-05-2021, 11:29 PM	#4
chevyrides Registered User Join Date: Apr 2018 Location: Campbell River, BC Posts: 7	Re: Vacuum fitting on manifold This is the part here.

11-06-2021, 06:10 AM	#5
Thealien Senior Member Join Date: Jun 2007 Location: Pine Ridge Florida Posts: 4,135	Re: Vacuum fitting on manifold I am not 100% sure but I believe that is part of the manifold and if it is missing I believe you need a whole manifold? Do you have a picture of your manifold in that location? __________________ Click on my Not really a build thread, yet NOT SO RUST FREE RUST FREE BLAZER LS ENGINE SWAP INFORMATION THREAD BOLT RESTORATIONS 4l60 to an NP205

11-06-2021, 06:39 PM	#7
Davidf Registered User Join Date: Nov 2014 Location: Austin Posts: 749	Re: Vacuum fitting on manifold Or, cut off the fitting, Drexel/grind the fitting out of the manifold. Then tap manifold for barbed brass fitting

11-07-2021, 07:42 AM	#8
95 S_Trucker Registered User Join Date: Oct 2009 Location: . Posts: 2,187	Re: Vacuum fitting on manifold You can install a plug or a hose fitting into that hole. Here’s a video. https://m.youtube.com/watch?v=eE0z4pRfHLo

01-01-2022, 02:44 PM	#10
solidaxel Registered User Join Date: Dec 2002 Location: Cactus Patch So. Az Posts: 4,749	Re: Vacuum fitting on manifold I'm looking for a solid plug I think you are right the red locking ring is part of the intake, BUT it does move so maby there is locking tab like the fuel line connection! !small tool! __________________ 53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42



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