(car repair) Intermittent metal rattle coming from under car

[fissure]

Happened to me on my truck. Same exact thing with no engine code thrown. One of the plates inside the cat converter came loose. I would bet its the cat.

[Drazzil]

Here is a possible wrinkle to the story. About 3 and a half years I was in a low speed front end collision with this car. I had the work done by a reputable shop 5000 dollars worth. Is it possible that a wield popped loose and that is the source of what I am hearing?

[tsolomon]

Had a similar problem with my VW when they replaced the Catalytic Converter and they tightened up the bolts unevenly. The heat sensor on top of the converter at a certain speed/rpm would lift up and hit the heat shield under the car. The dealer couldn't find the problem, but my mechanic buddy got a real laugh out of it when I asked him to look at it.

[shark]

I would seriously doubt that a low speed collision would pop a spot weld loose anywhere.

[gnbikes]

sounds like a problem with the car stereo to me. You probably need to add an amp and some more speakers to help cover up the sound...
G-
;-')

[riverdawg]

Originally Posted by gnbikes

sounds like a problem with the car stereo to me. You probably need to add an amp and some more speakers to help cover up the sound...
G-
;-')

My approach excactly...... if a bigger hammer doesn't help.

[big_jaygee]

I'm thinking cat could be the issue but I like this idea as well

Originally Posted by gnbikes

sounds like a problem with the car stereo to me. You probably need to add an amp and some more speakers to help cover up the sound...
G-
;-')