I hear a metallic rattling noise at low RPM's, on my Tribeca (3.6L H6). Only happens at low speed and low RPM, and it goes away after getting upto speed. I am thinking that this is the heat shield around the catalytic converter. I'm wondering what the usual dealer fix for a heat shield is? Do they normally try to repair the heat shield, or do they try to replace it with a new one? If they try to repair it, then how do they repair it, by bolting it back in place, or welding it or what?
Yousuf Khan