odd noise when first starting it?

2014 BUICK ENCLAVE
187,000 MILES • 6 CYL • 2WD • AUTOMATIC
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OLIVERERIC423
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The other day my car started to develop an odd noise when first starting it. It's almost like a pretty loud rattle. It would go away after a minute but a couple days later it started to stay longer and longer every time I drove. Yesterday the dash lit up saying something along the line of "Service Charging System". I have a short video to show the noise (camera cut off without me knowing so it's only 3 seconds so I apologize.) Just wondering if anyone can maybe pin point the noise or have dealt with a similar noise before? Thanks!
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Oct 27, 2024 at 4:49 PM
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STRAILER
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it sounds like the noise is coming from the front of the engine, correct? Please remove the serpentine belt and start the engine for a couple of seconds to see if the noise is gone, do not run the engine too long without the belt. If the noise goes away shut the engine off and spin the accessories to see which one is making the noise. Here is how, thanks for the video it helps. Chances are it is the serpentine belt tensioner. Check out the images (below). Please upload pictures or videos in your response of any problems so we can see what to help you with.

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Oct 28, 2024 at 12:32 PM
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OLIVERERIC423
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I followed the steps this morning. When starting the car after taking the belt off, it no longer made the noise. When spinning the pulleys, the only one that made any noise was the belt tensioner as you started it likely was, however the noise was a lot less rattle than when the car is running with it on but I'm guessing that's due to me using less force behind it than the engine will. Hopefully changing the tensioner will fix this problem. Thanks!
Oct 29, 2024 at 5:56 AM
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STRAILER
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Yep, you have found the problem :) Let us know if you need anything else. Can you please leave us a rating? (copy entire link)

https://www.google.com/search?q=2carpros&gs_ivs=1#lrd=0x80dcd47364be5d0d:0xba091aa4209f4497,1,,,&tts=0

and

https://www.sitejabber.com/reviews/2carpros.com

Thank you!
Oct 29, 2024 at 11:04 AM