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2005 Sienna Heat Shield Above Muffler

701 Views 12 Replies 7 Participants Last post by  edmonddragut_3609

About 4-5 years ago I repaired the heat shield above the muffler. 3 of the four mounting locations had rusted out. I was unable to loosen the factory nuts (and at least one of the posts itself started to turn when i tried. So I added a big washer and new nut on top of the old ones and it was fine. Well Sunday, the heat shield fell off. The one remaining factory mount and all 3 of my new ones had rusted. It fell off while driving so the heat shield itself got bent up, but I may be able to fix that.

Now I have a dilemma. Three of the holes on the exhaust shield are now about 1.5”+ in diameter, the nuts I added are now rusted on and there aren’t enough threads on those posts to add another but to the stack. If I take it to a dealer, the fact that one of the posts started to turn a few years ago worries me. I bet replacing the posts is a very expensive affair. I called a local (trusted) muffler shop and the guy on the phone told me to just drive it without it. I looked at where the shield is located and don’t see any wires or cables in that area. Just sheet metal for the floor under the third row seats. But I can’t imagine Toyota would spend the money to put a heat shield on there if it wasn’t needed.

So, what do you guys think is the best solution to this? Is it safe to drive without this shield?
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Thanks for the replies so far. I’ll try to get a pic as I think there is some confusion. It’s not the catalytic converter I’m referring to, but the heat shield that mounts to the vehicle body above the muffler.

it’s what the guy repairs at this link (the same repair method I used a few years ago that has failed now). It’s part number 6 in the diagram at this link.

A picture would help. Sure something could be rigged up. I wouldn't try to run without it. Your not hanging the exhaust, just a piece of sheet metal so maybe a little wire will work fine.
unfortunately this mounts to the body so there’s no easy way to secure it with wire.
Yeah, I’m inclined to leave it off, and that’s what the muffler shop said to do. I just want to be sure I’m not going to set the van on fire doing that. I have 4 kids and it’s our primary people mover, so I don’t want to take a foolish risk.
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