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After the car is warm from 10-15 minutes of driving, a rattle sound starts when I accelerate up to 3000-4000rpms. A tech at the Honda dealer says it may be a loose heatshield, but he didn't want to look at it. What could it be? If it's the heatshield, can I tighten it myself so it doesn't make that noise at higher rpms?

Thanks

 
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is it coming from the rear, front, or middle of the car??

im having a problem with rattling in the rear...i think my exhaust is vibrating on something

 
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My heat shield makes a bit of a rattle only when it is very cold outside, and it only happens during the first few minutes after a cold start in the lower revs. Once the car and exhaust heats up, the rattle is gone. I'm sure mine is heat shield, just a case of cold shrinkage and heat expansion I guess.

But if yours is happening after 10-15 minutes of driving then I can't explain it. Especially seeing that you are from Reno, NV which doesn't get too cold.

 
Rep Power: 812

It's coming from the front under the hood. And there is no sound while engine is warming up after cold starting it. It only starts after driving for a while. And it sounds kind of like intake sound, but rough. It has been making this sound before and after I got AEM SRI.

 
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I had a similar problem with a sound at around 3000 rpms, it ended up being a broken bolt on one of the engine mounts.

 
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i have recently acquired that problem as well....

when the car is cold, and first running, at around 1800-2000 rpms the car makes this god awful ratteling/vibrating sound....i originally thought it was my new front strut bar, but i found that not to be the problem

i had to car at the honda dealer yesterday and was tyring to get it to make the noise, but it wouldnt because i had just drove 40 minutes to get there.......anyhow the tech insits that it is my exhaust....

YEAH, OK! thats why it just started happening and ive had the exhaust for 2 years?
honda techs will blame ANYTHING on ANY aftermarket part to get away with less work.... you know what i say to that F U C K THEM! [IMG]i/expressions/face-icon-small-disgusted.gif[/IMG]

 
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mww, I had the EXACT same problem that me and Zaskar2k1 fixed on my car yesterday. I have a Neuspeed strut bar that I've had installed about a month and a half, and right at 2100 RPM i'd get this god awful vibration/rattling noise. I swore it was my Injen CAI, so I tore the bumper off and made sure everything was tight. It still did it. Turns out that the R134A refrigerant line was vibrating against the strut bar. I fixed it by putting a small piece of weather stripping between the hose and the bar, and now everything's perfect. You might want to make sure nothing's hitting the bar.

 
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I have the same problem. It doesn't happen through all the gears, only first up around 4.5k. It worries the s.hit out of me.