Intake vacuum modulator fitting.

[derrick79]

Ok so like I posted in the "performace" forum, my holley truck avenger won't fit on my edelbrock intake with the modulator vacuum fitting. However I was slightly trying to "manipulate" the line when I broke off the top of the fitting. Problem is I can't seem to find an aftermarket fitting that allows the vaccuum line to slide into it like the old one. Any ideas? Is there different vaccuum lines you can buy? I am sure I could find a fittng at a wrecker but that means my carb won't fit.

[bake74]

     Can you post up a couple of pics so we can see what you are talking about.

[derrick79]

here is the picture. So you can see the vaccuum line. You can also see where the top of he fitting broke off. It is just a little tube that the vaccuum line slips into then has a rubber peice over top to keep the line from flopping out. Worst case scenario I could slip the line into the fitting as is and use silicone but I wuld rather not. Also, the valve covers I got don't have an oil fill? Just two holes with grommets. One which fits the PCV, the other is slightly too big. For the breather I would assume. What are you guys using for oil fill ports? I guess I could use the hole for the breather? Here are the covers I bought...

http://www.summitracing.com/parts/PRO-141-750/

[bake74]

     First I would take that fitting off, and drill/tap it out.  Then run down to the hardware store and get a threaded hose barb, thread in to the newly tapped piece and use a short rubber hose (as you stated) to put the other end in and clamp off.  That way it is tight and sealed.
     On my 74, my pcv valve is in the grommet on the passenger side and the breather is on the drivers side.  I fill up my oil through the breather side, just pull it off and fill and replace breather, that is the way I have always done it, and my dad before me.

[bake74]

     On a second look at that pic, that fitting might already be threaded, can you tell if it is ?  Or try a easy out.

[VileZambonie]

http://corvetteparts.com/dc/item/27656

[Stewart G Griffin]

In addition to the corvette site, you can also get these fittings in the HELP section of most autoparts stores.


i would just put the tube back in and use duct-tape to hold it down and keep everything sealed but that's just me.

[Psycho71]

How about getting a lower profile 90 degree fitting for the intake, cutting the metal tube, and use a short piece of rubber tube to complete the connection? Then you could use the Holley carb too. If I wanted my Holley on that truck, that's what I'd do. Heck, that's probably what I'd do with or without the Holley carb. You could even plug that hole in the intake and use the manifold vacuum port on the Holley.

[derrick79]

Thanks for the help guys. The other rubber hose coming off that fitting hoes to that vacuum canister ball thing on the firewall. What exactly is that for? I suppose could run that rubber hose to another hole on the intake couldn't I? That way I could use the 90 for the trans modulator.

[VileZambonie]

That's the vacuum reservoir for your heater controls.