You know that rattle that earlier g3 integras get around 2.5-3.5k rpms?

Can someone explain to me exactly what that is? It started about 4 months ago at ~3000rpms, but got some headers and fixed it like a charm. So I figured it was that a-pipe rattle, and the new headers got rid of it. Well, about a month ago it started up again at ~3000rpms and now its even doing it at 1000. So it rattles on and off at idle, stops, then again at ~3000. Would these be cracks in my flange, and/or cat? I assume (and hope) its not the headers (ceramic dc 421)

Is it air escaping through a crack(s) making the metal rattle? Why would it be rattling at 2 separate points now? another crack formed? If anyone has delt with this issue and physically seen the problem, I just want a good picture of whats going on. I dont have the money to fix it now and want to know if its really hurting my car, or if its just an annoyance issue I'll have to deal with till I can get it looked at.

thanks.

 

My car has some rattles and noises too.. but with the exhaust and other crap making noise.... I just turn the radio up louder.. problem solved..

 

Did you take your cat heat shield off? Thats what my moneys on.

Also, make sure the header is bolted to the support bracket.

 

Yeah I am betting on the cat heat shield too......

 

just get a whole new exhausting new header , new cat, new exhaust system

 

its the cat heat shield....just get it fixed. do not take it off. i dont know where ur from but the cat gets very hot and could cause leaves or some **** to start a fire when parked

 

thanks for the replies guys

ahh... feel much better. Glad to hear its probably just a heat shield

thanks again!

 

now that this topic is going, i have a question too, when i start my neg up and i'm just sitting in neutral, i get the same kinda rattling, one i start moving it stops but i'd still like to know what it is, any ideas? its an on and off rattle too, not consistent.

 

If you can, get the car on high jacks or a car lift. I wouldn't have known it was my cat shield without lifting it. I thought it was the internals of my cat. The shield had a fine line crack in it.