Excessive popping and pinging sounds from my LX470, what could it be?

[WannaCruise]

Hello all,

I have regular popping and pinging sounds coming from underneath my LX470 after it gets warm. I know there is thermal expansion and contraction going on, but this seems excessive. I notice it when I stop, and I notice it at red lights and drive throughs as well. I've added a video to Youtube that can be viewed/heard here:



This is after turning off the car, of course. It still happens when running, but it's not as bad, but still evident...

Is this a normal amount of noise for these vehicles? If not, what could be causing this?

 

[shane431]

That seems kinda loud to me. Weird.

 

[AlpineAccess]

That's more than the normal ticking of thermal expansion when compared to my vehicle. I would use a mechanics stethoscope and pinpoint the pinging noise.

It does sound like something hitting the exhaust or something loose in the exhaust, but its tough to say without narrowing the source.

 

[txaggie76]

I have this but a much lighter less version

 

[JunkCrzr89]

Cats clogged. Is it slow to accelerate?

 

[WannaCruise]

Cats clogged. Is it slow to accelerate?

Not that I can tell, but I'm comparing it to an LX450 so that's not a fare comparison...

 

[Jeremyleeblack]

I have this but a much lighter less version

Me too, it's a lighter version of the same thing.

 

[ClassyJalopy]

Cats clogged. Is it slow to accelerate?

Asks about a 100: "is it slow to accelerate?"

 

[JunkCrzr89]

Asks about a 100: "is it slow to accelerate?"

Good point But compared to all my other jalopies, the 100 is a rocketship!

 

[Formerjeeper]

Watching. I have same issue in my 2005 LC. Wondered about the cat.

 

[Mike NXP]

Echos of the garage making it sound louder? I like alpines suggestion of crawling under and poking around with a stethoscope to narrow it down.

Hell if my truck looked that rust-free on the underside I'd be OK with a little pinging and popping

 

[Jeremyleeblack]

I tried running some Cataclean through the truck, it seems to have helped a little bit but still popping a little. Whats the next step, taking out the Catalytic converter and cleaning it right?

 

[JunkCrzr89]

Whats the next step, taking out the Catalytic converter and cleaning it right?

Yeah, with rebar to bust everything out and make your 100 appear to have a cat but not actually have a functioning one