[Spridgets] battery drain--update

Bill Masquelier billmasq at hotmail.com
Mon Nov 30 18:33:27 MST 2009


It is virtually (notice that I didn't say "completely") impossible for a blown
diode in a rectifier pack to allow AC current into the system- the best that
it could do is pulsating DC and that is really no problem. When the diode blew
your alternator just couldn't pump enough current into the system to charge
the battery or run the car.

BillM

> From: corvallis at peoplepc.com
> To: spridgets at autox.team.net
> Date: Mon, 30 Nov 2009 17:00:07 -0800
> Subject: Re: [Spridgets] battery drain--update
>
> I've been told that AC current in the system can damage a battery. But that
> person was trying to get out of a battery warranty.
> Misses and pops and spits out the carb could be timing, like the advance on
> the distributor isn't working right. You might put a timing light on it and
> see if things are smooth as rpm's increase or if the timing jumps around.
> ...bill in Oregon
>
> ========================================
> -----Original Message-----
> From: spridgets-bounces at autox.team.net
> [mailto:spridgets-bounces at autox.team.net] On Behalf Of Andy Webster
> Sent: Monday, November 30, 2009 4:06 PM
> To: spridgets; spridgets at autox.team.net
> Subject: [Spridgets] battery drain--update
>
> Greetings folks,
> I had my alternator repaired (rectifier had blown diodes) and put it back
in
> last night.
> No more ignition light unless the ignition is on and the engine stopped (as
> it
> should be).
>  The  auto electrician showed me the old rectifier, and how one of the
diode
> wires had earthed against a plate and welded to it.
> He also said that it wasn't a genuine Lucas rectifier and that the diodes
> were
> very cheap and feeble looking.
> He reckoned the alternator was a 'bitsa' . The only thing that bore the
> Lucas
> name was the outer case.
>
> Engine is still running like a pig, so the search continues....
>
> To be honest I am a  bit stumped.
>
> The engine will run, but it misses and pops and spits out the carb.
>
> My engine has a "TRIGER"  Gilmer belt cam drive. Has anyone ever heard of
> these jumping a tooth and putting the valve timing out by a few degrees? It
> doesn't seem likely......I think I am clutching at straws here...
>
> My spark seems healthy enough... and the single SU (hif-44) seems to be
> fine..
> I pulled the dashpot off and checked for dirt in the jet and anything that
> might be wrong...but found nothing suspect.
>
> I figure that whilst the alternator was knackered, it was hurling
> alternating
> current through the wires, which can't have done much good for anything. I
> am
> wondering if this might have damaged the coil.... the symptoms don't seem
to
> fit with a bad coil though....
>
> I think I will put one of my dellortos on, just to see if I can eliminate
> the
> SU from the line-up.
>
> open to ideas and suggestions.
>
> Cheers
>
> Andy
> Gold Coast
>
>
>
>
>
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