My car is making a cluttering noise WHY???

[richesmoua]

why is my 1990, 240sx, sohc motor, making a cluttering noise when I start the car, driving, and just idling. I am out of ideas of where its coming from. I checked the cat converter and it seems fine. Had my brother take apart the whole custom piping nothing inside the pipe. I checked my s15 conversion(The place that installed it did a shity job) just incase they forgot a loose nut and bolt somewhere, nope it wasn't it. I kept on listenning to the cluttering and it seems like it was coming from the head. One thing that I am guessing is the timing chain. Come on people I need some help.

[Addicted2Kouki]

everything you checked makes a different noise.

maybe you can describe what it sounds like....
a video might help if its a loud enough noise.

[richesmoua]

well, I don't even know how to set up a video clip, but the sound does sound like when you have small rocks in your exhuast pipe or when the cat heat shield is banging against the cat converter. makes an annoying sizzling sound.

[aziankingz]

dude, how about searching. No one reply back. He needs to learn.. .