I'm the 3rd owner of my car. Since I bought it, it had a slight rattle from the engine bay. When I turn the a/c on, it gets louder. When the compressor turns off, the rattle can only be heard with the hood open. When the compressor kicks back on, its very noticeable. When I step on the clutch and/or give the car some gas, the sound goes away. The only mods are an exedy dual stage clutch,full 3inch exhaust, and boost controller, all installed by previous owner. - thought it was an exhaust rattle but A shop i go to around here says it might be the throw out bearing. Any ideas?

 

its normal especially exedys do that unless the clutch is very old...TOB will make noise most of the time though

 

Yep... totally a normal noise the TOB makes.. nothing to worry about.. normally happens when its old.. when you get a new clutch in the future make sure to replace it.

 

I had a similar problem and it was the TOB. Mine didn't involve the A/C though. Just when I was coasting.