a while ago i replaced my fan belt becuz it was showing some wear and making some noise. after i did the noise went away for a while but i bought my little tercel for the MPG and i only drove the truck on the weekends/when i needed to haul something. since its started snowing i have been driving my truck alot more and its making the squeeking noise again. its worce when the engine is cold but it continues even after the engine is warm. one person i talked to suggested its a pulley but im not sure how right he could be since i didnt know him and i have no idea how much experience he has with engines. do i just start to tighten stuff down and see where it goes? im assuming too tight would be bad so i dont want to over do it.