took off my serp/belt to check it only has 20k on it Gates. mild cracking. probley put new dayco on it. was checking pulleys on water pump and idle/tension pully they werent squeaking or no metal to metal sound just a slight sound when you turned them cant explain the sound. are these pullys supposed to be completely quiet. or have alittle sound when turning. my truck had a small squeak up front could not locate it when starting the truck only with a cold truck and cold under 50 temps did it last year, and again now that fall is coming and getting colder mornings the sound is back. unless this sound is from the belt.