ferrari 348 ts

my exhaust sounds like its rattling or vibrating when i rev the car could this be something loose inside the system or the brackets that support the exhaust have broken or come adrift .

 

I had two exhaust rattles when I bought my 348. One was from the actual catalyst "honeycombs" inside the catalytic converter chambers, which were moving around inside, although they appeared to be intact. I took the converters off, drilled a small hole into the bottom of the chamber, threaded the hole, and installed a screw that secures the honeycomb in place. Hasn't rattled since.

The other rattle was from a broken bracket on the left side of the muffler, right where the pipe enters the muffler. Since I was in a hurry to fix this at home, instead of having the bracket welded back on, I used a good sized stainless steel hose clamp to attach the bracket onto the pipe. It's worked fine for years. That was the main rattle. Didn't cost anything to fix.

 

thanks for the information it was very much appreciated

 

I had a rattle as well that ended up being the bracket that holds the muffler on....

 

ditto for me.

turned out to be the metal heat shields on the catalytic converters. - just crimped them back in place with some pliers