When my 04 started rattling, you could reach in and shake the heat shield (when it was cool of course) two of the nuts where loose, so I put some locktight on them and tightened them down, and then no more rattle

 

Are we talking about the heatshield on the manifold?

 

Rattled on my 05. Made the stealership fix it.

 

Well I dont want to take in because I'm lazy.

I was just wondering if any 05s had the problem. Guess I got something to do tomorrow.

 

wellat work we get a lot of probs with heatshields, most the time there put onj with rivits and they do come loose a lot of times, take it to the dealer and if your still under warrenty let em fix it, theyll most likey put hi temp silicone in ther or do somting stupid but most times it fixes prob

 

Like I said I'm to lazy to take it to the dealer. I'm going to do it my self.

If I take it to the dealer I would have to schedule, drop it off in the morning, wait til they get to my truck then pick it up.

And if you seen how much cars they take in everyday. Its not worth it just for something simple.

 

Easy troubleshooting on the exhaust manifold heatshield. All our heatshields are held on with studs/nuts. There are three heatshields.

Eliminate the manifold one, Take it off. Four 10mm nuts. Disconnect the o2 sensor, pull off the shield, reconnect the o2. Take it for a drive. If the buzz/rattle is gone, then that was it. [If it still buzz's, check the O2 sensor tightness with an 7/8" open end wrench...] Before you put it back on, bend out the heat shield flange wider down by the O2 (that is what contacts and vibrates). Then put it back on when the exhaust cools down.

The other two are under the truck, near the second cat.

All my problems were on the front one.. I hope that helped ya. Good luck.

 

I'm just going to tighten everything up and see if it goes away.

It doesn't bother me because my music is too loud anyways. But the woman pointed it out so I might as well fix it in my free time.

 

also bro. it might have been from it being such thin metal it might have gottin bent and just viberating against somthing else

 

I have had the heat shield rattle for a while now. I removed it and bent it only for the sound to come back eventually. What do you think about replacing the shield with a exhaust header wrap? Would this be as effective as the heat shield? At least it would not rattle, right? Here is an example of what I was talking about.


http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_744845_-1_10261

 

Any suggestions??? :?

 

heres a new one.the nut that holds the heatshield on by the o2 sensor has vibrated off on my 05 colorado.i was wondering what the hell that buzzing noise was when i was driving.thanks for the help i learned from this thread.