[Mk2] [NA] Alternator extremely hot, low charging voltage

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drunknmunky
Posts: 79
Joined: Mon Dec 29, 2014 8:11 pm

[Mk2] [NA] Alternator extremely hot, low charging voltage

Post by drunknmunky »

As per title, suddenly the lights dropped dim and battery meter reading about 11 volts, but didn't continue dropping, just running lower on charge than it should. I have a reconditioned alternator in there, only about 2 months old ish. But when I checked for a loose belt, tension was fine but noticed the alternator casing is ridiculously hot.
Any ideas please.
pbmr2
Posts: 929
Joined: Fri Jun 18, 2010 12:49 pm

Re: [Mk2] [NA] Alternator extremely hot, low charging voltage

Post by pbmr2 »

get a multimeter on the battery with the engine off and then again with it running. post results

it does sounds like the alternator has gone, did you get a warranty with the recon?
drunknmunky
Posts: 79
Joined: Mon Dec 29, 2014 8:11 pm

Re: [Mk2] [NA] Alternator extremely hot, low charging voltage

Post by drunknmunky »

I'll go borrow a multi meter tomorrow and get results thanks, it was a cash job so no official receipt but I've used the guy a few times over the years so hopefully he'll re do it again free if it is that.
drunknmunky
Posts: 79
Joined: Mon Dec 29, 2014 8:11 pm

Re: [Mk2] [NA] Alternator extremely hot, low charging voltage

Post by drunknmunky »

So it turns out one of the coils inside the alternator had broken down from hitting the casing (re previous thread about couldn't stop it seizing). Be done in couple a days :-D
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