[Spridgets] Dead battery and alternator?

[Linda Grunthaner]

Very interesting information. Good to know.
Linda

On Thu, Sep 4, 2008 at 12:25 PM, cclabaw at juno.com <cclabaw at juno.com> wrote:

> Listers -
>
> This topic reminded me of a solution learned from riding old motorcycles.
> Frequently a battery would "fail" due to sulfating (sulfate build-up
> causing a
> short between the plates of two cells), which resulted from letting the
> water
> get too low, too many times.  The answer was to pull the battery off and
> bang
> it on the curb a couple of times.  This knocked the deposits off and would
> allow me to get home.
>
> Clay L.
> '67 Sprite
>
> -- "David Lieb" <dbl at chicagolandmgclub.com> wrote:
> >I left my lights on when I went to work this morning and needed a jump to
> >get started inorder to get home.  I drove 35 minutes home on and off of
> >highways at 3500-4000rpm.  I stopped to get a haircut andd then couldn't
> >get the car started again without another jump.  I have no idea how old
> the
> >battery is (from previous owner) but shouldn't the alternator have
> >recharged the battery enough to start the car in that time?
>
> Ryan,
> A bad battery can kill a good alternator and a bad alternator can kill a
> good battery. Also, some batteries (especially Exide and Mopar in my
> experience), when completely discharged will not recover completely.
> Frequently one cell will lose its ability to hold a charge. Put a charger
> on
> it for a while, then disconnect the charger and check the voltage across
> the
> posts. Should be about 13.2VDC. Then hit the starter once and then measure
> the voltage across the posts again. If it has dropped to about 10.5VDC or
> lower, you have one or more cells that do not hold a charge. Replace the
> battery.
>
> OTOH, it is perfectly possible that you blew the alternator in the process
> of jump starting the car twice. If you can jump or push start the car, rev
> it up to 2000rpm and see what the battery voltage across the posts is. If
> it
> is around 14.5VDC or so, the alternator is probably happy. Otherwise, pull
> it off and see if Pep Boys will test it for you. I know Murrays and
> AutoZone
> will.
> David Lieb
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