LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

5/8" Vacuum cap

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Old Nov 18, 2003 | 09:25 AM
  #1  
Red96Lt1's Avatar
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5/8" Vacuum cap

Where do I get one of these? I'm installing headders and want to do !EGR and !AIR and someone told me I needed 2 of these.
Old Nov 18, 2003 | 09:30 AM
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Check with Autozone or one of those places. JMHO
Old Nov 18, 2003 | 09:35 AM
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Not to discourage you in any way but I have been searching for these same vaccuum caps for a month now with no luck. I rigged mine up with some 5/8 heater hose and a hose clamp but the cap would be much "cleaner".
Old Nov 18, 2003 | 10:24 AM
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They go on the side of the TB right? And I need 2?
Old Nov 18, 2003 | 10:30 AM
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What do you need the V caps for? I guess I don't quit understand what it is you are trying to cap.
Old Nov 18, 2003 | 10:38 AM
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3/4 - 16 x 3/4 aka M-18 drain plugs?

if so http://cgi.ebay.com/ebaymotors/ws/eB...category=33610
Old Nov 18, 2003 | 10:55 AM
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Originally posted by BUBBA
What do you need the V caps for? I guess I don't quit understand what it is you are trying to cap.
I'm putting on some Jet Hot LT's and in the process I am going to !AIR and !EGR and someone told me that I needed a 5/8" Vacuum cap.
Old Nov 18, 2003 | 10:58 AM
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You can buy the caps to plug the hole at autozone. They have a section that is all brand HELP!. I'm pretty sure that's the name of it. The plugs fit perfectly.
Old Nov 18, 2003 | 11:05 AM
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Thanks! They go on the side of the TB right, and I need 2 right?
Old Nov 18, 2003 | 11:19 AM
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You are thinking about the TB bypass. It is my understanding that when deleting AIR and EGR, all you need is one vaccuum cap for the back of the CAI.
Old Nov 18, 2003 | 11:22 AM
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You need a single 5/8" vacuum cap to put over the nipple on the inlet air duct, that you take the AIR pump air feed hose off of. It is a very common item in most well stocked auto parts store. If they don't have one on the "HELP!" rack - as noted in the post above - ask them to order you one.
Old Nov 18, 2003 | 11:38 AM
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I just bought a package of these last week! They were called "by pass" caps and were indeeed on the "Help" rack at my local Murray's Discount Auto store. They had both the 5/8" and 3/4" size and the 5/8" size cost me $2.59 + Tax, for a package of two(2) caps. Hope this info helps?
Old Nov 18, 2003 | 11:58 AM
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pep boys has them. theyre called bypass caps and theyre in the help section
Old Nov 18, 2003 | 12:33 PM
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Originally posted by brandboZ28
You are thinking about the TB bypass. It is my understanding that when deleting AIR and EGR, all you need is one vaccuum cap for the back of the CAI.
Ahhhhhhh, THANK YOU, I was so confused
Old Nov 18, 2003 | 01:35 PM
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Just curious: Why does one delete the EGR and AIR pump? I see where many have, but I don't yet understand why? Thx.



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