Does my exhaust look bad?
I got a "exhaust leak before cat" note at the smog. No codes or anything else. All other tests passed.
Car has 225k. 2010 LT. Should I drop the whole thing and inspect? Or is there a known common point of failure? Also which thing is the cat? I think I saw 2 or 3 big units along the exhaust? Lastly does this bolt up to the exhaust header on the base models? I know on the ss it goes to the turbo. Also, what's this type of flex pipe called? The SS has a mesh thing instead of these metal ribbed things. https://cimg0.ibsrv.net/gimg/www.che...d7ad0e518c.jpg https://cimg3.ibsrv.net/gimg/www.che...4470d4b962.jpg https://cimg7.ibsrv.net/gimg/www.che...fe73b07192.jpg https://cimg1.ibsrv.net/gimg/www.che...84b5d4f92f.jpg https://cimg3.ibsrv.net/gimg/www.che...096934fadf.jpg https://cimg5.ibsrv.net/gimg/www.che...8a001f10cc.jpg https://cimg9.ibsrv.net/gimg/www.che...31d4afc40c.jpg |
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Did the smog pass? Most likely a gasket or a small hairline crack in the flex pipe.
I'm still amazed. My 1999 4.3 has the factory exhaust in 2024 al be it a bit rusty. Back east (NE) the stock one went two-3 yrs max then it was Walker lifetime muffler. Give 'em the muffler we'll make it up on the tubing so they're sales strategy went in those days. |
Originally Posted by WoodysMobile
(Post 946154)
Did the smog pass? Most likely a gasket or a small hairline crack in the flex pipe.
I'm still amazed. My 1999 4.3 has the factory exhaust in 2024 al be it a bit rusty. Back east (NE) the stock one went two-3 yrs max then it was Walker lifetime muffler. Give 'em the muffler we'll make it up on the tubing so they're sales strategy went in those days. Everything passed but I got a note on "other" criteria that said there is a leak before the catalyst. I guess the 02 sensor detects pressure or something? He said if it was after the cat it wouldnt have mattered. https://cimg8.ibsrv.net/gimg/www.che...8cacee3963.jpg |
This thing was cracked. Unsure if I did this while removing it. No other cracks or holes detected
https://cimg3.ibsrv.net/gimg/www.che...caf187449a.jpg https://cimg8.ibsrv.net/gimg/www.che...8d58dc6caa.jpg https://cimg4.ibsrv.net/gimg/www.che...3d527de842.jpg |
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It would be a weak band-aid at best. Do it once & do it right.
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Originally Posted by sleeper
(Post 946162)
It would be a weak band-aid at best. Do it once & do it right.
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You'll want to cut off the old flex pipe, slip the new one on with significant overlap. Then reinstall, and a few tack welds. Then remove it, weld it up, and reinstall.
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