The pulleys for my alternator, fan, AC, etc and my serpentine belt whistle very loudly when I start the car in the morning. It subsides after about ten minutes of driving, but it still occurs. There is also a tapping sound. I think the tapping sound is coming from a baffle in the exhaust system. Not sure. Do you know how I can silence the whistling sound. Belt dressing seems to make it worse at first.
If I used WD-40, would that work on the inside of the pulleys but not touching the belt?
2006-10-31 12:04:14 · 9 answers · asked by rasckal 3 in Cars & Transportation ➔ Maintenance & Repairs
I'm gonna guess that you have a gm truck, or suv. They are noted for alternator problems. But I would first get a new belt, because they can stretch, dry out. And if you are putting belt dressing or wd-40 on it, that will multiply the belt noise. I would strongly recommend going to get a new belt, and while you or the mechanic, are changing it, check all the pulleys. Try turning the pulleys with no belt on, you should feel one of the trying to turn a little harder. I wouldn't wait too long, or you may be walking home. ps..............post what kind of vehicle it is. thanks
2006-10-31 12:24:12 · answer #1 · answered by Speedbuggy43 4 · 0⤊ 0⤋
don't use WD-40 on serp belts it will cause the belt to slip off the pulleys. with the engine off check the condition of the belt, make sure its not cracked or dried out. If you don't remember changing it then you probably should. If your not sure where the noise is coming from take a wax crayon or candle and rub it against the ribbed part of the belt while engine is running. Be careful. If its the pulley you can try some spray lube but usually you just have to replace it. Tapping from the engine is usually the valves knocking against the engine. An additive may help to quiet them.
2006-10-31 12:19:49 · answer #2 · answered by Anonymous · 0⤊ 0⤋
You did not specify year make and model of vehicle it does make a difference if you have a self adjusting serpentine pulley that may be the cause or it could be a sticking AC clutch or a bad belt? There are several things you need to give a little more information.
2006-10-31 12:13:28 · answer #3 · answered by ELI'S MOTOR'S 1 · 0⤊ 0⤋
Spray wd-40 on inside and outside of belt, if noise stops its the belt if not it a pulley or there is a bering out in one of the pulleys. If noise stops replace belt with new one
2006-10-31 15:05:47 · answer #4 · answered by stealth5033 3 · 0⤊ 0⤋
You didn't state the year, make, and model of your ride with the engine info, so it's pretty hard to give you any quality answer here. I know there are some vehicles where the noise you describe, SOUND LIKE a belt noise, but may actually be something else.
2006-10-31 12:14:48 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Wd40 sometimes works, sometimes it gets worse. how old is the belt?does it whine at idle or when you hit the throttle?is it a whine or squeel a whine will more than likely a pully alternaters whine when going bad. to check that take the belt off and any of the pullys move back and forth its bad and needs to be replaced.i recommend waiting till something quits working, because you may waste money looking for a problem that just simply is making noise. "if it aint broke dont fix it."
2006-10-31 12:42:08 · answer #6 · answered by Matthew J 3 · 0⤊ 0⤋
get new belt and pulley's now. Sounds like about to break.
WD-40? will increase the slip and make a louder noise.
2006-10-31 12:12:47 · answer #7 · answered by tjdepere2003 6 · 0⤊ 0⤋
I just had this problem yesterday with the belts. Your Serpentine belt might be to loose.
2006-10-31 12:15:05 · answer #8 · answered by dvdatlas 1 · 0⤊ 0⤋
replace belt tensioner
2006-10-31 12:23:12 · answer #9 · answered by browning_1911 3 · 0⤊ 0⤋