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Thread: How long does a battery last if the alternator doesn't work properly?

  1. #1 How long does a battery last if the alternator doesn't work properly? 
    Car Enthusiast CF Newbie
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    How long does a battery last if the alternator doesn't work properly? The mechanic down the street said that the alternator charges when the car is idling, but anything more than that and the alternator isn't strong enough. How long do you think the battery will last? Would it make a 2 hour drive to my good mechanic? Thanks in advance!
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    Retired CF Moderator CF Senior Member
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    An alternator isn't a big job. Any mechanic should be able to do it. You simply take off the belt, probably just by loosening up the tensioner, then unbolt the alterator. If the alternator has an adjustable bracket, you may want to mark where it was so it goes to the same location again.

    If your alternator is going out when you're driving, a two hour drive will most likely kill it.

    Yes, it will kill the battery fast too. You should probably have someone check the battery charge.
    "When governments fear the people, there is liberty. When the people fear the government, there is tyranny." Thomas Jefferson

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  3. #3  
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    If the alternator is bad, definitely don't attempt a 2 hour drive with it. Just pick up a new alternator and change it yourself. You can do it with basic hand tools.

    If you don't feel comfortable, just go to your nearest autozone and see if you can talk them into putting the new one on for you once you purchase it from them.
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    Pinko Commie Ricer CF Moderator blah's Avatar
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    yeah, there is no way you'll make it that far. you could try it, but it won't work out
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