Clicking from Cats

[irocdupi]

Ok so when I start my ex up and its cold it has always clicked or ticked as you may say. You go under the truck and if you put your ear to the cats you can hear it. What can this be, when it heats up it goes away almost completley but can still hear it alittle

 

[morziac]

mine started this way and ended up gettin louder and louder until one day the engine went into safety mode due to the ceramic inside the cats breaking loose and blocking the exhaust completely. I'd say its definately ur cat converter starting to fail, before too long i would think ur CEL would come up with a code to confirm this.

 

[irocdupi]

Its been doing it about a year so im not worried about it yet when its breaks ill get it fixed then