Loud noise coming from the driver's side, then it shut off while driving drained the second brand new battery that was installed?

Tiny
KENDRALEE226
  • MEMBER
  • 2013 HYUNDAI SANTA FE
  • 2.0L
  • AUTOMATIC
  • 110,000 MILES
Cat was making a loud noise coming from driver's side. Seemed to be having trouble when accelerating. Then shut off while on my way to work. It wouldn’t jump so I replaced the battery. Then it broke down a second time and the brand-new battery was completely drained. Everyone keeps saying the alternator but that doesn’t explain the loud noise or the trouble accelerating. Please help.
Tuesday, March 11th, 2025 AT 12:46 AM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 13,996 POSTS
The loud noise may have been the alternator locking up and causing a large power draw on the engine. I have seen a seized alternator stop and engine from starting because the starter couldn't turn the engine. First thing I would do is go under the hood and use a wrench to turn the belt tensioner and loosen the belt and remove it. Now go to each of the pulleys and see if they turn freely. I suspect at least one won't. That will be the item you need to deal with. It could be any of them. The image shows the belt path. You will need a new belt as well as a pulley that isn't turning will damage the belt.
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Tuesday, March 11th, 2025 AT 4:56 AM

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