Bad Cats or exhaust rattle?
#1
Registered Member
Thread Starter
Bad Cats or exhaust rattle?
Has anyone had bad cats or know what they sound like? I recently installed a full catback (custom) and I now here a rattling noise. Not sure how to upload a video here but when I figure it out I'll upload it. I have a '12 sedan with a custom 2.25" exhaust. When I installed it I had no issues but once I tightened up the v band clamps I'm now getting a rattle. Not sure if it's a heat shield near my x pipe or if it's the cat heat shields but it's getting pretty annoying.
https://m.youtube.com/watch?v=M28zI-0TJ5I
#2
when i had my stillen exhaust on my old g35 i had the same issue. it turned out to be a loose connection, but i would figure the heatshield first. jack up your car and take a rubber mallet and tap on your exhaust and see if you can find where the rattle is comming from. also check your clearances and make sure the exhaust is not tapping or rubbing on something.
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QuinnDEskimo (01-16-2018)
#3
Registered Member
Thread Starter
Thanks for the suggestion. I'll take a mallet to it when I have some time this weekend. I looked on youtube and found a few other videos with the almost exact same sound saying the cats were no good. Maybe it's time for some HFC's or resonated test pipes. Hmmmmmm.
#5
Registered User
Did you figure out what was causing it? I've been getting the same problem since I put on my HKS Axle Back. Been thinking it's a good time to go test pipes or HFCs.
#7
Registered Member
Thread Starter
Sorry for the delayed response. So about 6 months ago I finally had time to replace my cats with motordyne ART’s and upon removing the cats I shook them and sure enough the insides were rattling around inside. Seems as though the catalytic part somehow broke up inside and was rattling. I don’t hear any rattling since the swap just the usual decel hiss that most experience with test pipes on the VQ.
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