Rattle, what is this rattle? Options

[Euphoria]

Hey, had a rattling problem somewhere in the exhaust recently which I believed was the flex pipe, had it replaced and the noise is still there so I'm fairly sure its the cat, now as far as I can see in the Australian ST204 there is only one cat which is on the manifold? so I looked up on Ebay and they seem the most expensive ones and as for getting them in Australia I'm sure they are super expensive so I have a couple options.

I looked at my friends mums celica recently and noticed it had headers and where my cat was, it looked to have none and the o2 sensor was lower, why is this? would there have been a cat in there that couldn't be seen perhaps?

another option is perhaps gutting the cat until I find one at a wreckers or something, I've heard people say this lowers power and makes it louder, I've also head it makes it no louder and no more or less power, whats really the answer?

thanks, this is driving me crazy.

This post has been edited by Euphoria: Apr 12, 2010 - 11:30 PM

[b22ri22an]

Does sound kind of similar, I will have to get a video, I did one with my phone but its a ****ty recording.

well whatever mine is, it has been there since i got the car. I took it to toyota once and had them listen to the sound and they said its nothing to worry about................................................. but never proceeded to tell me what it was. It only happens at certain RPMs, very weird, but i've learned to live with it since it isn't bothering anything.

i know what your rattle is samir.... mine had it too it ended up being the upper timing cover rattling between 800 and 2200 rpms, it sounded exactly like that only when started cold after it warms up the sound isnt there. when i got my timing belt done the noise was gone

[samir0189]

Does sound kind of similar, I will have to get a video, I did one with my phone but its a ****ty recording.

well whatever mine is, it has been there since i got the car. I took it to toyota once and had them listen to the sound and they said its nothing to worry about................................................. but never proceeded to tell me what it was. It only happens at certain RPMs, very weird, but i've learned to live with it since it isn't bothering anything.

i know what your rattle is samir.... mine had it too it ended up being the upper timing cover rattling between 800 and 2200 rpms, it sounded exactly like that only when started cold after it warms up the sound isnt there. when i got my timing belt done the noise was gone

good guess, but the t-belt and all components was recently done at toyota, i had them listen to the noise and they replied "its normal."

im starting to think it is the cat-con..... a header may help me figure it out...