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2001 Chevrolet Tahoe Question: Battery boils over



retiredpig, Livermore, CA, January 26, 2009, 14:01

I have changed the alt. and also the battery but the battery seems to boil over and there is corrosion all over the battery tray and surrounding area. What would cause the battery to BOIL over?

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  • Answer #1

    January 26, 2009, 18:13

    Sounds like the battery is overcharging. Overcharging is from a high charging voltage, caused by a bad voltage regulator in the alternator. Do you know the charging voltage while the engine is running?

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