ive had this problem before but now it has become louder. when at a red light and i run the ac or defog a loud vibrating sound comes from under the hood, when i put the car in neutral it will stop, when it goes back into drive it is loud , when i let the car creep a few feet it gets alittle more quiet, not much, and when i take off the noise stops, with the ac on the pick up(take off from a red light) is much slower, it defintely drags,
and also had problem before and replacing the serpentine seemed to have quieted the condition down a bit, serpentine belt has been replaced at 32.6k miles and at 64k miles, my question is this: ive heard of other belts lasting way longer than mine, i have had to replace 2 belts with in 32 k miles, could there be a mechanical condition in which the belt is being caused to wear down more than it should? what could it be and how can i fix it?
should i also replace belt tensioner to avoid the problem of it lettting go and having to rebuild the engine
