B5.5 2.8. I changed all the pulleys and belts less than 2 years ago and it's only been driven like 10k miles or less. Could this be a bad bearing in the aux fan? All other tensioners and pulleys were changed except the alternator's but the sound is too high. It feels like it's right under the engine cover. Will have to wait until daylight and warmer temps to check. Any risk in driving it?