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How to stop battery terminal corrosion?

Tiny
DIDI7154
  • MEMBER
  • 2015 TOYOTA RAV4
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 81,000 MILES
Hello, my battery, 4 years old, keeps getting corrosion and foam around the terminals and the battery itself. I’ve charged it and added distilled water to the battery, and it is functioning fine. I’ve cleaned the terminals a few times, but the corrosion keeps coming back. What is causing the corrosion and how can I get it to stop?
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Monday, May 9th, 2022 AT 8:25 AM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 12,950 POSTS
Check the alternators charging voltage. If it charges at a higher voltage, it is likely the cause of the problem.

https://www.2carpros.com/articles/how-to-check-a-car-alternator
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Monday, May 9th, 2022 AT 9:44 AM

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