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What is the tube off the passenger exhaust?

Old 08-29-2018, 07:32 PM
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What is the tube off the passenger exhaust?

I have been reviewing the forms, service manual and Google but I have not been able to figure out what this part is. Iím assuming itís part of the EGR system. It is the tube that runs off the top of the passenger side exhaust and back under the intake. Mine is leaking and I need to figure out part numbers or at least descriptions so I can get parts ordered.

91 z28 350
Thanks

Last edited by Barnyard; 08-29-2018 at 07:37 PM. Reason: Add eng description
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Old 08-29-2018, 08:11 PM
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Re: What is the tube off the passenger exhaust?

Smog tubes, I believe is what they are called.
Or air pollution pump tube.
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Old 08-29-2018, 10:41 PM
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Re: What is the tube off the passenger exhaust?

Sounds like someone put in some corvette parts.
google corvette tpi or look up the manual for a tpi corvette.
the vettes thst had aluminum heads had the egr tube come off thr passanger side exhaust manifold and feed into the intake at the back by the distributor.
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Old 08-29-2018, 10:43 PM
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Re: What is the tube off the passenger exhaust?


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Old 08-29-2018, 11:16 PM
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Re: What is the tube off the passenger exhaust?

Yeah that's not the usual arrangement for our cars. It came on TPI Vettes because their heads were different.

But yes, it is the EGR tube. (or hose, sometimes) Look it up for about a 89 Vette and see what you get.
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Old 08-29-2018, 11:18 PM
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Re: What is the tube off the passenger exhaust?

I think he is talking about the A.I.R. tube. Barnyard, if you follow the tube does it go all the way to the catalytic converter? If so, then it is part of the smog system. It pumps air into the cat to help combustion.
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Old 08-29-2018, 11:44 PM
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Re: What is the tube off the passenger exhaust?

Thanks guys, I thought i was going crazy. Here is the picture, but it looks just like tealman92's photo, just not as good as shape. I will check out the vette's

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Old 08-30-2018, 01:33 AM
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Re: What is the tube off the passenger exhaust?

Yup, Tealman is correct. That is an EGR passage.
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Old 09-03-2018, 06:33 PM
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Re: What is the tube off the passenger exhaust?

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Old 09-03-2018, 06:50 PM
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Re: What is the tube off the passenger exhaust?

That's an AIR part... exactly the same, except different.
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