Exhaust leak from cat / resonator
#1
Exhaust leak from cat / resonator
Hey guys, I've got an exhaust leak in the car/resonator part of my exhaust. I bought brand new gasket and it still has a leak. Anyone else run into this ? Just annoying. Thanks.
Any "Backyard fixes" ?
Any "Backyard fixes" ?
#2
Check all around the resonator, top to bottom front to rear. My understanding is that they rust in spots you can't see by just looking under the car. Just like the muffler and Cat. If gasket was bad then moisture could have gotten into the resonator and started rising it from the inside.
And check back on this post. I know there are members who can help with more details. Good Luck!
And check back on this post. I know there are members who can help with more details. Good Luck!
#4
Thanks Chibi, I wasn't sure if the heat shield was on the top or bottom cause my car ain't got one and I never had any problems with the exhaust on my 5th Gen. The heat shield is what I was trying to lead to But I didn't want ti give out wrong info.
#5
Join Date: Apr 2010
Location: Mentor, Ohio
Posts: 12,225
Yeah, the factory res is garbage as far as holding up over time. My Monte had the seem on it rot away. The wife's Impala is doing the same thing. I need the res deleted on it, but it's really not that loud right now, so I've left it alone.
#6
Check all around the resonator, top to bottom front to rear. My understanding is that they rust in spots you can't see by just looking under the car. Just like the muffler and Cat. If gasket was bad then moisture could have gotten into the resonator and started rising it from the inside.
And check back on this post. I know there are members who can help with more details. Good Luck!
And check back on this post. I know there are members who can help with more details. Good Luck!
#7
If the flange bolts aren't equally torqued it can cause it to warp. I'd check both flange surfaces to insure they are flat and have no debris left from previous gaskets. Prior to assembly apply a bead of High Temp Copper sealer to both flanges, then torque to 24 ft lb.
#9
Thanks for the input... Ill give it a shot.. If it still leaks ill weld it myself. Just bought a Lincon Mig Welder, to bad I didn't have it when the cat was installed..lol... Pulled the exhaust today... Ill let yak now... Thanks again..mjclemm...
#10
The cat weld is darn near perfect, I used smoke from a Incense and it was coming out of the resonator / Cat flange. I used a brand new gasket and it still wants to leak (a tiny bit) but still leaks.. So, I'm gonna use a doughnut semi metallic gasket where the flange meets. Then I'm gonna try and weld all the way around the flange, if it leaks after that.. Well.... MIDAS !....lol... Thanks for the input... Mjclemm..