Clunking noise at idle from rear of car?

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SomeCarGuy

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While I'm sorting the car out, I found a new problem.

There is an intermittent clunking from the rear of the car.

Sitting at idle it clunks real loud. I first thought it was the trans but I narrowed it down to the right rear area. I pulled off the gas cap to see if the tank might have a clogged vent, no luck.

Sounds kinda hollow, like you are pecking on a drum. :huh:

Could it be a "mini" back fire in the right side exhaust? No crossover pipe. I don't think so but this is a new one on me.

15 or so B or E body's and I have NEVER heard anything like this.
 
Start it up, lay down on the ground where you think it's coming from and listen. Off the top of my head I can't imagine a clunking from the rear on a car not moving. For me, any clunking in that location has been either suspension or exhaust...
 
Are your exhaust pipes tight? I had a car where the pipes were either a bit loose or just not in the right position and would bang on the frame somewhere.
 
It does put me in mind of a bad rear end but it isn't moving so...

I've been laying all around and I can't pinpoint it yet.
 
SomeCarGuy said:
I've been laying all around and I can't pinpoint it yet.
Click to expand...


Sounds like me, I'll spend the day listening in the rear, meanwhile the noise is coming from the radiator, LOL :lol:

The noise disappears when you're driving?
 
I found a clamp loose so I thought I was all good. Took it out and returned. Didn't hear a thing while driving, got back home and the RR sounded like a popcorn popper :brickwall:

I took a 2x4 and pushed on stuff, turns out it i the right muffler, must have a baffle busted inside.

Looks like I won't be getting just tips at the exhaust shop. :toetap:
 
SomeCarGuy said:
I found a clamp loose so I thought I was all good. Took it out and returned. Didn't hear a thing while driving, got back home and the RR sounded like a popcorn popper :brickwall:

I took a 2x4 and pushed on stuff, turns out it i the right muffler, must have a baffle busted inside.

Looks like I won't be getting just tips at the exhaust shop. :toetap:
Click to expand...

I had that on the birdible (dam brand new muffler also) drove it a while and it heated up enought to get it relogged good , now its fine
 
Guess I'll have to see. It looks like brand new, although it has been on the car for over 5 years, maybe a lot longer.

Since I'm going in for the X and tips, might as well end the problem. But if it fies itself, that is cool. :drive:
 
SomeCarGuy said:
Guess I'll have to see. It looks like brand new, although it has been on the car for over 5 years, maybe a lot longer.

Since I'm going in for the X and tips, might as well end the problem. But if it fies itself, that is cool. :drive:
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yeah mine may come back but for now it's quiet
 
The possibility of a busted baffle INSIDE the muffler is very intruiging...I've been chasing a similar condition in Tam's Swinger for more than a year now...been under there countless times and never found anything... This might be it! Kind of embarrassing to be sitting in a car that nice at a traffic light and it sounds like someone is ringing a hollow-sounding dinner bell under the car... Thanks for offering yet another possiblity guys!

:jester:
 
ACME A12 said:
The possibility of a busted baffle INSIDE the muffler is very intruiging...I've been chasing a similar condition in Tam's Swinger for more than a year now...been under there countless times and never found anything... This might be it! Kind of embarrassing to be sitting in a car that nice at a traffic light and it sounds like someone is ringing a hollow-sounding dinner bell under the car... Thanks for offering yet another possiblity guys!

:jester:
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mine was a loud vibrating humming sound . I thought my exhaust was moving around or my jack base or something was rattleing in the trunk LOL
 
I've had baffles break and rattle around too.
 
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