Serpantine belt noise
Sorry if this has been answered before. About a week ago I noticed a squeak that sounded like the serpantine belt, I have replaced and put conditioner on a new belt and still have the squeak. I will add that when the wheels are turned the squeak stops for a few seconds then starts again, I have checked power steeeing fluid levels and its full. Until the engine gets hot the squeak only occurs at 1500 rpm or higher but once warm it will squeak at idle. The car is a q7 3.6 with 100,000 miles. Any help would be greatly appreciated
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Just replacing a belt would not cure a squeak. The squeak comes from a failing bearing.
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So would it be reasonable to assume that replacing the pulley on the power steering pump would solve it? It just seems that there is something with the pump causing the squeak since that's the only time it quits.
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Most likely an idler pulley, when the belt is off spin the pulleys by hand to see which one has a dry sound.
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Originally Posted by Jay Carter
(Post 25313976)
So would it be reasonable to assume that replacing the pulley on the power steering pump would solve it? It just seems that there is something with the pump causing the squeak since that's the only time it quits.
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Originally Posted by Dudeness30
(Post 25314042)
Most likely an idler pulley, when the belt is off spin the pulleys by hand to see which one has a dry sound.
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It CAN be a pulley. I had a Toyota Tundra that had an idler pulley replaced under warranty because of belt to pulley noise. The sound was almost metallic but was really the belt grabbing in the pulley grooves. When it is squeaking spray a bit of water on the grooved side of the belt. If it stops immediately, case closed. Figuring out which pulley may be harder.
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Originally Posted by J. Patterson
(Post 25315829)
It CAN be a pulley. I had a Toyota Tundra that had an idler pulley replaced under warranty because of belt to pulley noise. The sound was almost metallic but was really the belt grabbing in the pulley grooves. When it is squeaking spray a bit of water on the grooved side of the belt. If it stops immediately, case closed. Figuring out which pulley may be harder.
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Nope. Tension was correct. Multi groove belts can get noisy without slipping. It would chirp with or without the ac compressor load. It’s usually wear in the belt grooves but on the Tundra it was the idler. Don’t mean to be argumentative. Just describing what I have seen. :-)
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I’ve developed a subtle chirping from my serpentine belt too. Root cause was due to degreasing and cleaning my engine bay. Over time your engine will naturally pick up a bit of road grime and oil and it will get in and around the pulleys keeping them generally quiet. Wash all that stuff off and you’ve washed away all that “natural” lubrication in and around your belt and pulleys.
Simple fix for me was to replace the serpentine belt just as a preventative measure and spray a touch of belt conditioner around the serpentine belt. Problem solved. Not all chirping or squealing is due to a faulty or failing pulley / tensioner. Of course check your pulleys and make sure you don’t have heavy resistance and that your tensioner is actually moving as it should. When was the last time you replaced the belt? |
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