Engine Rattle?

[thebab]

89 Coupe with a KA24E in it..... stock everything minus suspension and a short ram intake.

If I rev it real quick to 3000 rpms right at 3k rpms it makes a rattle noise.

For the longest time I thought it was the heat shield on the exhaust making the noise. I finally got to taking the heat shields off and it still makes the rattle noise.

I rev it while listening in the bay and it sounds like from behind the motor/above the transmission/ near the fire wall I guess.

I have no idea what it could be.... going 60mph or so on the highway with my rpms around 3k it's constant.

Anyone ever experience this before?

I really need to just swap in DOHC or SR it but no fundage right now.

[Second Shadow]

it probably is the exhaust, there's more than one heat shield on that thing and they all can make that rattle, and so can a few other things attached to it.

I'd take it to a muffler shop. I had the same problem several years ago and the shop fixed it for free in about 3 minutes with a welder.