hhrumadbruh

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.

hhrumadbruh

Also would this be an option?

WoodysMobile

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.

hhrumadbruh

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.

hhrumadbruh

This thing was cracked. Unsure if I did this while removing it. No other cracks or holes detected

hhrumadbruh

hhrumadbruh

Can I jbweld this just to smog it lol

sleeper

It would be a weak band-aid at best. Do it once & do it right.

hhrumadbruh

you're right. It's only $40 for the part anyway. Going to order it

RJ_RS_SS_350

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.