Testing the alternator can be done either by checking with a voltmeter
directly on the battery posts and should read about 14.5 volts with a good
battery (simple check). Another option is to take the car, or alternator, to
a local auto parts store such as Advance Auto or Autozone. They will test it
for free.
No, you don't *need* an MGB alternator (Lucas) to have the car functional,
unless you must stay original for shows. Some owners have used a Delco,
while I myself have installed a Bosch. The correct rebuilt Bosch ones for
your year car are direct plug and play and are on Ebay most of the time.
Output is about 60 amps. Expect to pay about $60-$70 for one with a 3 year
warranty.
Mike
'79B
----- Original Message -----
From: "Betti Ann & Preston Smith" <prsmith@ns.sympatico.ca>
To: "MG List" <mgs@autox.team.net>
Sent: Thursday, July 22, 2004 10:14 AM
Subject: Alternator on way out?
> 1980 MGB LE
>
> The ignition light has a faint glow. After tightening the belt it is
> still there at times (not as often) and the alternator has a high
> pitched whine.
>
> I assume the whine is attributed to the bearings going - does the faint
> ignition light suggest I should be looking for a rebuilt alternator?
>
> How can I test the alternator's output?
>
> If I need a rebuilt do I need a MGB alternator or can other units do the
> job with minimum fuss and bother?
>
> Thanks
> Preston
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