Catalytic converter noisy

1996 CHEVROLET SUBURBAN
230,000 MILES • 5.7L • V8 • 2WD • AUTOMATIC
Avatar
DAVISMELODY6669
  • MEMBER
  • 65 POSTS
I purchased shorty headers and a direct fit catalytic converter and followed by a 2017 Silverado muffler. my goal was to make it be less noisy and save money because I installed and welded it myself. The noise and little rattle noises didn't seem right. Did I do something wrong? please help if possible words of advice.
May 6, 2020 at 3:48 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Advertisement
Avatar
DAVISMELODY6669
  • MEMBER
  • 65 POSTS
The sound is weird.
Video (Click to enlarge)
Attached Media
May 6, 2020 at 3:59 PM
Avatar
KASEKENNY
  • CAR REPAIR CONTRIBUTOR
  • 18,907 POSTS
That is metal to metal contact. I doubt you did anything wrong but I just suspect the exhaust is resting on or touching another piece of metal. It appears to be pretty close to that cross member. Is it making contact anywhere? Use some sort of insulated gloves or a shirt or something and press up and pull down on the exhaust to find where the noise is coming from. Clearly once you start touching it and dampening it, it will change or stop all together.

There are no tricks to this. Just protect your hands and see when it stops and that will be where it is touching something.

Let us know what you find. Thanks
May 6, 2020 at 5:23 PM
Advertisement