Rattling noises

[Dunkee]

I have got the most annoying noises coming from my 96 240sx. Everytime I bring my RPM to 3000 or higher I get this weird rattling of metal coming from the rear. I checked the muffler and the heat shields and they don't seem like they are loose. It seems like its gettin worse the more I drive it <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/nervous.gif" border="0" valign="absmiddle" alt=':nervous:'> some body please help me...

[silvia240]

bump

[Gismo R]

Does it do it just at 3000rpm or all the way after 3000rpm? My '97 does the same thing at about 2500rpm, but only at that rpm. I beleive it is one of the heat shields. It doesn't do it when it's cold, just after it's had time to warm up a bit. I guess that's because when it gets hot the metals expand causing is the get just loose enough to rattle and be annoying. &nbsp;<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>

[Dunkee]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (Gismo R @ Mar. 29 2002,1:46)</td></tr><tr><td id="QUOTE">Does it do it just at 3000rpm or all the way after 3000rpm? My '97 does the same thing at about 2500rpm, but only at that rpm. I beleive it is one of the heat shields. It doesn't do it when it's cold, just after it's had time to warm up a bit. I guess that's because when it gets hot the metals expand causing is the get just loose enough to rattle and be annoying. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'></td></tr></table><span id='postcolor'>
Actually now that you mention it, it only does it 3000 RPM but only when it warms up. What are you gonna do about it...Repair or remove?

[95SEowner]

there are two heat shields welded on the INSIDE of the hollow catalytic convertor shell (midway underneath the car). &nbsp;I bet you a thousand bucks the small tack welds have come apart that hold those shields on the inside. &nbsp;This sounds stupid but you will have to trust me. &nbsp;get down there pull the thing off and look in the inlet and outlet. &nbsp;it's hollow except for two plates that end up breaking loose and beating themselves against the inside of the cat every time you goose it and the exhaust rushes over them. &nbsp; I had a really bad experience with this problem too on my 95. &nbsp;

see an earlier post from mar 23 in "tech talk" entitled "exhaust noises..." &nbsp;hope it is helpful. &nbsp;sounds like a lot of people have this same problem. &nbsp;

Take Care,

Later...