Brake Booster..... ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

solidaxel · 09-10-2013, 12:41 AM

Where do you tap vacuum from a 5.3 to a stock 78 pick up brake booster?

**Clyde65** · 09-10-2013, 07:48 AM

what year motor? I believe there should be a port on the back of the intake. thats where mine is...

solidaxel · 09-10-2013, 09:42 AM

The 5,3 is a 2004.
There is a port that goes into the valve cover (maybe T the PCV?)

Robznob11 · 09-10-2013, 02:28 PM

At the back of the intake there is a round port . If you look at the back above where your oil press sender you should see it. Gm sells a barb that fits in there. Ill have to wait till i get home to get the pt # but i got mine at scoggin dicky in lubbock for about 8 or 10 bucks.
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Robznob11 · 09-10-2013, 02:31 PM

Quote:

Originally Posted by solidaxel

The 5,3 is a 2004.
There is a port that goes into the valve cover (maybe T the PCV?)

definatly wont hook to valve cover lol! But i guess if you had an intake with the purge valve behind the tb you could remove that and tap that hole. But if yours has the port in back id use it caus the barb is made for it.
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solidaxel · 09-10-2013, 02:39 PM

Thanks.
The manifold end of the PCV hose, not the valve cover!!

Robznob11 · 09-10-2013, 02:55 PM

Hee hee! I gotcha lol theres always a wise guy and he usually sticks his foot in his mouth lol when i get to the house ill check the pt # on that barb and post it up if no one has by then.
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83_shortwide · 09-10-2013, 06:06 PM

12559760

Double check me on that

BR3W CITY · 09-10-2013, 07:15 PM

This is 12559760

1/2 Nipple.

solidaxel · 09-11-2013, 01:18 AM

Does that replace the plug in the left rear of the phelem.
I will take both numbers to the dealer and see what he puts on the counter.
I also need vacuum for the HVAC, Will a "T" work here also

Thanks

ls1nova71 · 09-11-2013, 10:49 AM

Yes, The nipple replaces the plug. There's a red plastic piece that you pushin on while pulling out the plug. As for the A/C, there is a fitting on the right side of the intake that you can break a little tab off of and hook the HVAC hose to it. Post #204 of the build thread of my rusty '71 in my sig has pics if you're not sure what I'm talking about.

solidaxel · 09-11-2013, 03:39 PM

Quote:

Originally Posted by ls1nova71

Yes, The nipple replaces the plug. There's a red plastic piece that you pushin on while pulling out the plug. As for the A/C, there is a fitting on the right side of the intake that you can break a little tab off of and hook the HVAC hose to it. Post #204 of the build thread of my rusty '71 in my sig has pics if you're not sure what I'm talking about.

Thanks, that helps (#204), I would never thought of breaking something to find a port!
The red push pull plug?
What part is removed?
I will try and push & pull !!

ls1nova71 · 09-11-2013, 05:48 PM

When you pull on the plug the red part will try to come with it and not allow the plug to come out, take a small screwdriver and push the red part back in while still pulling the plug. Its really easy once you try it.
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BR3W CITY · 09-11-2013, 07:18 PM

There is another plug on some of the hydroboost trucks, but it still looks like a plastic vacuum plug. (just not red iirc). I couldn't find the number but I sent TruckDude off looking for it.

solidaxel · 09-11-2013, 11:42 PM

Quote:

Originally Posted by ls1nova71

Yes, The nipple replaces the plug. There's a red plastic piece that you pushin on while pulling out the plug. As for the A/C, there is a fitting on the right side of the intake that you can break a little tab off of and hook the HVAC hose to it. Post #204 of the build thread of my rusty '71 in my sig has pics if you're not sure what I'm talking about.

You were right...............push the red sleeve ,and pull the black plug out!!!
Ordered the part number from the local Chevy dealer, $8.11 with tax

...........Next item on the list!!!!

When I run out of things to do I am going back and read your build, I guess I should have already read it, because of all the questions you could have answered. Nice work

Thanks for the help

09-10-2013, 12:41 AM	#1
solidaxel Registered User Join Date: Dec 2002 Location: Cactus Patch So. Az Posts: 4,749	Brake Booster..... ? Where do you tap vacuum from a 5.3 to a stock 78 pick up brake booster? __________________ 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

09-10-2013, 09:42 AM	#3
solidaxel Registered User Join Date: Dec 2002 Location: Cactus Patch So. Az Posts: 4,749	Re: Brake Booster..... ? The 5,3 is a 2004. There is a port that goes into the valve cover (maybe T the PCV?) __________________ 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

09-10-2013, 02:28 PM	#4
Robznob11 Registered User Join Date: Feb 2004 Location: brownfield texas (west texas) Posts: 1,936	Re: Brake Booster..... ? At the back of the intake there is a round port . If you look at the back above where your oil press sender you should see it. Gm sells a barb that fits in there. Ill have to wait till i get home to get the pt # but i got mine at scoggin dicky in lubbock for about 8 or 10 bucks. Posted via Mobile Device __________________ The Ghost 67 short wide full custom. 550 hp LSX, 4l80E, narrowed 9". Body dropped w/air ride! ........................ ___ .........________//__{\_____ ,,,,,,,/__(⊙)___//___/__(O)_/ @disciple2.rc 💪instagram💪 LED TAILS

09-10-2013, 02:39 PM	#6
solidaxel Registered User Join Date: Dec 2002 Location: Cactus Patch So. Az Posts: 4,749	Re: Brake Booster..... ? Thanks. The manifold end of the PCV hose, not the valve cover!! __________________ 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

09-10-2013, 02:55 PM	#7
Robznob11 Registered User Join Date: Feb 2004 Location: brownfield texas (west texas) Posts: 1,936	Re: Brake Booster..... ? Hee hee! I gotcha lol theres always a wise guy and he usually sticks his foot in his mouth lol when i get to the house ill check the pt # on that barb and post it up if no one has by then. Posted via Mobile Device __________________ The Ghost 67 short wide full custom. 550 hp LSX, 4l80E, narrowed 9". Body dropped w/air ride! ........................ ___ .........________//__{\_____ ,,,,,,,/__(⊙)___//___/__(O)_/ @disciple2.rc 💪instagram💪 LED TAILS

09-10-2013, 07:48 AM	#2
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,540	Re: Brake Booster..... ? what year motor? I believe there should be a port on the back of the intake. thats where mine is... __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!*

09-10-2013, 06:06 PM	#8
83_shortwide Registered User Join Date: Apr 2011 Location: Gilmer, TX Posts: 29	Re: Brake Booster..... ? 12559760 Double check me on that __________________ Bo '83 C10, LQ4, 4L80E

09-10-2013, 07:15 PM	#9
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: Brake Booster..... ? This is 12559760 1/2 Nipple. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD Last edited by BR3W CITY; 09-11-2013 at 12:31 PM.

09-11-2013, 01:18 AM	#10
solidaxel Registered User Join Date: Dec 2002 Location: Cactus Patch So. Az Posts: 4,749	Re: Brake Booster..... ? Does that replace the plug in the left rear of the phelem. I will take both numbers to the dealer and see what he puts on the counter. I also need vacuum for the HVAC, Will a "T" work here also Thanks __________________ 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

09-11-2013, 10:49 AM	#11
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,118	Re: Brake Booster..... ? Yes, The nipple replaces the plug. There's a red plastic piece that you pushin on while pulling out the plug. As for the A/C, there is a fitting on the right side of the intake that you can break a little tab off of and hook the HVAC hose to it. Post #204 of the build thread of my rusty '71 in my sig has pics if you're not sure what I'm talking about. __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html Last edited by ls1nova71; 09-11-2013 at 11:00 AM.

09-11-2013, 05:48 PM	#13
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,118	Re: Brake Booster..... ? When you pull on the plug the red part will try to come with it and not allow the plug to come out, take a small screwdriver and push the red part back in while still pulling the plug. Its really easy once you try it. Posted via Mobile Device __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

09-11-2013, 07:18 PM	#14
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: Brake Booster..... ? There is another plug on some of the hydroboost trucks, but it still looks like a plastic vacuum plug. (just not red iirc). I couldn't find the number but I sent TruckDude off looking for it. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD



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