Vansibel

So below 60 km on my car I started noticing a very annoying buzzing sound like those fart cannon youngster install on their civic. After wiggling with the metal insulator just over the driver site muffler sound was better but still there. Removed the wheel to get a better view and there is actually some kind of screw that is not connected anymore. After further inspection it seems that its actually the metal insulator who rusted out and disconnected from the bolt. I'm not sure that the fix is to put a new bolt nut, I don't think it would prevent from the insulator to pop out. If you look at this video you'll understand:


On this diagram http://jp-carparts.com/lexus/partlis...ype=5&fig=5802

58328D seems to be the insulator, but the nut (90179-06226) don't seems to be located at the same spot. My guess is that the insulator got degraded at this spot and don't fit snug enough and a new one would fit tight on that bolt without moving. Unless there is a better solution I plan on putting some black silicone on there to prevent the insulator from popping out.

rick3242

Hello - similiar thing happend to me on my toyota tundra. I bent one end back around itself like a U shape and it keeps it pretty much in place.

DavidinCT

Maybe a little cleanup with a wire brush and get a wide washer(thinking a larger one) and a nut... It should be able to lock it down... Sounds like it can be annoying...

Might be hard as it looks like a tight space.

roadfrog

Those heat shields are useless. I removed mine years ago when I replaced my mufflers. I too had an occasional buzz at certain frequencies. No more.

Oliver Enterprises

I 2nd the b.o.w. idea. b.o.w. = big ole washer.

Chuckinnj

And when you are under the car install some Oliver Enterprises exhaust vents along with the B.O.W!

Vansibel

Some black silicone addressed the problem, noise is gone completely. Sweet old 5.0 v8 is back

Tec80

This is a systemic Toyota issue, my Prius also has it. Toyota needs to change their heat shield fastening design to prevent fatigue around the too-small attachment points.

Oliver Enterprises

Did you drop the big bore kit in it?

Tec80

He has an LS600hL, which comes with the factory big-bore kit ;-)

Oliver Enterprises

Ahhhh, yes. Missed that. I wonder what a 600hL "big bore" 5.0L sounds like with double stack Exhaust Vents?