I have a 2001 durango 4.7 slt with 98,000 miles. It runs good but was wondering if anyone experienced a "ticking" or "pinging sound" coming from their engine? Im not sure if it is in the engine, the a/c compressor or what. It also seems to get worse when it gets cold out. I took it to the dealership (since believe it or not it is still under warranty) to see if they knew what was wrong and of course they said nothing was wrong. It's not that big of a problem its just annoying especially when it is cold...it gets really loud. Any input would be greatly appreciated.