Join Date: Aug 2005
Location: , CT
Feedback Score: 7 reviews
There are a lot of heat shields under there. Pinpoint where it's coming from by having a friend rev the car up and hold the throttle where its rattling while you track it down (be safe!).
There's an exhaust manifold heat shield, one around the cat (which comes loose a lot, I just ripped mine off), one bolted to the chassis above the mid-pipe right past the cat, and another bolted to the chassis above the resonator in the midpipe (again, past the cat).
And those are just the ones that you definitely still have on your car. There's one above the muffler in the stock exhaust system, and one right before the resonator as well.
If it's the cat heat shield (which i'm going to bank on). You have a few options:
-Grab some large heavy duty hose clamps at the hardware store and tighten them around the cat to shut the heat shield up.
-Rip the thing off. Be advised that the O2 sensors go *through* the top part of the heat shield, and they're pretty tough to get off. When I ripped my heat shield off, I opted to use a cutting wheel to sheer the bolts off and slice right through the top heat shield to get it past the O2 sensors. It was easier than trying to fight with both sensors.
The shields that are bolted to the body of the car aren't as easy to remove because the exhaust pipes block most of the bolts you need to take out to get them off the car. The exhaust manifold shield just plain rattles, I haven't figured out a fix for that, and i'm afraid to take that one off and melt my fans or wiring.
Hope that helps.