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Exhaust tube

Forum: C3 HVAC, Fuel, Emissions, and Exhaust

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Exhaust tube

Posted: 2/9/10 8:52amMessage 1 of 6
o
ossw1
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Rocklin, CA - USA
Joined: 4/2/2005
Posts: 484
Vette(s): 1970 T-Top350/350hp numbers matching 4 speed. It's a mess and 1970 Convertible 4 speed.

I am replacing half of my exhaust on the 81. There is a smaller tube running along the side the larger exhaust tube on the passenger side that ends right next the Cadillac converter.  The new converter that I have has a small tube sticking out the side. So the question is what are they for and do I have to meld them together?

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Exhaust tube

Posted: 2/9/10 10:29amMessage 2 of 6
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DaveM
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Flanders, NJ - USA
Joined: 1/27/2004
Posts: 2556
Vette(s): 1982 Black, ZZ4, Hooker Side Pipes, 3.55 Rear, Rebuilt & upgraded 700R4, All new suspension, brakes, & new Charcoal interior.

They should connect together with a rubber hose. It's part of the A.I.R. system. Use a heavy duty hose, it gets hot under there' don't use vacuum or windshield washer hose.

Dave

 

Lifetime Member #116
Dave's '82

   

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Exhaust tube

Posted: 2/9/10 11:24amMessage 3 of 6
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Adams' Apple
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22714
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
Yup...it's for the air injection(AIR) system. It injects fresh air into the converter to help burn the nasty stuff, since it makes the converter run hotter.
You can connect it with a rubber hose, but it MUST be a high-temp, exhaust compatible hose. Regular hose will likely catch on fire eventually. You can also have a muffler shop weld it together, if ya want, or they can make a small adapter fitting so it will clamp together.

Joel Adams
C3VR Lifetime Member #56    
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(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

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Exhaust tube

Posted: 2/9/10 1:06pmMessage 4 of 6
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dskopp
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Oak Creek, WI - USA
Joined: 5/21/2008
Posts: 2041
Vette(s): 1981 Great White Shark. Red Interior, 350/190 hp. PS, PB (SS), A/C CC, T-Tops. Served three years in Active Duty Army, then Retired Air Force after 34 years! Badger State Vettes Car Club. 175,000 Original miles!! Now own a 1998 C-5!
Yup, thats what it is!!  Us 81 guys gotta stick together!!!!!
Dan


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Exhaust tube

Posted: 2/10/10 6:55pmMessage 5 of 6
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ossw1
Former Member
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Rocklin, CA - USA
Joined: 4/2/2005
Posts: 484
Vette(s): 1970 T-Top350/350hp numbers matching 4 speed. It's a mess and 1970 Convertible 4 speed.
Hey looking at my original converter there is no place where the tube connects to it. At the end of the small tube there is a rubber piece covering the end. Is this normal? Did non-California car have that setup?
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Exhaust tube

Posted: 2/10/10 9:02pmMessage 6 of 6
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Adams' Apple
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22714
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
If your original did NOT have the tube connected, then just transfer the rubber cap over to the new converter.

Joel Adams
C3VR Lifetime Member #56    
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(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

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