Originally posted by uclaccord
hey...i hear a rattling, but only at 2500 rpms...sounds like metal and sounds like it's coming from the lower portion of the engine bay...like by the exhaust mani...was wondering if this is heat shield rattle and what i can do about it...also...started after i got a resonator installed...any other causes?
I had the same problem.
It turned out to be a shattered down pipe. If you take a rubber mallet, and give your pipe a stiff knock, you should be able to tell if thats your problem. If it's damaged, you'll hear loose pieces of metal inside. Also, while you're there,.. check the gasket between your cat and down pipe.
Some guys claim the rattle is from the heatshield, but that wasnt the case for me.