help me repair my smog tube (picture)

NO_RICE

Founding Member
May 5, 2001
405
1
16
Tucson, AZ
While attempting to move the check valve on my smog tube it litterally broke off in my hand (its rusted on the inside), now I need to reattach it, but I want to use a piece of rubber hose. has anyone done this, is there any reason it wouldn't work? It connects to a rubber hose after the valve so It doesn't seem like heat should be an issue.

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i dont see why it wouldnt work. there isnt much heat or pressure on that line, so it should be fine, i think. for the day or 2 between removing my smog pump, and removing the rest of the lines, i had a bolt wrapped with electrical tape jammed into that pipe just so i wouldnt have to hear it, and it worked....
 
NAPA sells high-temp silicone hose that will work just fine for that, if you'd prefer to replace the whole rusted-out pipe. Bear in mind that the stuff is absurdly expensive - something like $8, as I remember it - but it'll last darn near forever.

On my '86 GT, I've got a four-foot length of (I think) 3/4" green silicone hose running from a sawed-off piece of the original smog tube behind the cats on the stock H-pipe up to the check valve. It smoked just a little for the first day or so that I had it, but since then, it's been fine. Main reason I used it was because I got sick of fighting that damned stock metal air tube, and once you get at least 18" away from the H-pipe's connection on that metal tube, the exhaust heat is hardly an issue at all - just make sure it doesn't lay up against the cats as you run it parallel to the exhaust past the headers, and you'll be fine.

Being that you're only dealing with a portion of the tube that's way the heck up by the front-end, you could easily get away with using plain ol' heater hose, actually, because there's almost no heat transfer at all from the exhaust to that portion. Heck, the stock connections on the front-end aren't anything special, either, as they're about the same kind of rubber hose used to come off your water pump and to/from your heater core. Take a 3/4" ID section of heater hose and two hose clamps, and poke that thing on in between the two broken pieces of metal tubing, screw it down, and you're set. :nice:
 
JC is that my old stang???

go to arizona hose and ruber, i think thats the name, and get some silicone hose, they sell it by the foot, and they also sell all sizes of hose for the turbo project. They also sell those sweet hose clamps, but they are like 5 bucks or more a pop.

Duffey
 
Yeah thats the yellow beast, its a little dirty :nono: , click on the link in my sig and you can see the progress. I ended up cutting a straight piece of tubing at a 45* and making a 90* elbow out of it and welding it together, because it had to be a really tight bend and its REALLY close to the header.