My 03 sedan sounded funny after spending a weekend with a relative from out of tow in need. Further inspection revealed a crack along the lower weld of the cat just before the y pipe. Is this weldable? Thanks in advance.

 

A picture would help but I would think it's fixable depending on the size of the crack.. What brand are your HFC's?

 

I had a hole in my J-pipe on my Accord and a muffler shop was able to weld it up. Months later its still holding. Good thing too, $450 to replace it if that didn't work. So along a weld it should be fixable.

 

Welding a converter or even trying to patch it is questionable due to the massive heat! A better idea is to replace it with new Fast Intention HFC's! Ask your favorite Muffler Shop, they'll know how there welds hold with converters!
Gary

 

Gary there are factory welds up and down the exhaust system and they seem to do just fine but the FI suggestion is a good one for sure.

 

Uploading as we speak. It was the APS High Flows.

https://g35driver.com/forums/engine-...-s-vq35de.html

 

 

Damn that's not just a crack. With a hole that large I'm guessing you'll have to replace it. Sucks because they look like they were well made.

 

Brother, I was loving them. Didnt have them a year and this happened

 

I suspect something impacted and fractured the metal, typically the metal used for cats is a softer grade but I've never used APS stuff. Call and talk to APS to see if they can repair it or perhaps give you a steep discount on a replacement since it broke evenly on the weld and that usually means a shallow tig weld thus a manufacture defect.

You can also shop around a local metal fab to see if anyone can just tig it back together, should be able to filler over that hole with a few passes and since it's such a clean process I doubt it would damage the media inside, might look a little wierd when they're done though.

EDIT: I would probably stay away from muffler shops for that repair unless they do a lot of tig welding, most exhaust shops just use DC stick weld. You need someone that does a lot of tig so a commercial welder that does industrial work will probably be your best bet. Also try your local community college if you end up with a steep repair price, the colleges usually have a welding certification program and they will have a student do the fix for welding practice.

 

There is a local muffler shop that does fantastic work. I will check with them 1st.

 

A shop near my house actually does alot of custom work and race projects. They welded it up and 40 later, I'm sounding like I should. Other than heat coming from the lower driver side seat (I have had this for some time) no major issues to report. Appreciate all the help!

 

Awesome, glad you got it all worked out.