Borked Alternator?
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Borked Alternator?
Hi All,
Just brought a new van and on the way home the battery started boiling over. As it has been sitting for a while I just assumed it was old and replaced the new battery, however the same thing started happening when I fitted the new one. Placed a multi-meter on it and its putting 17V into the battery at idle. Am I correct in thinking the alternator has had it? I've replaced it for a Lucas 65Ah motor for a 1.9L petrol van. Going to be using a leisure battery so assume the alternator upgrade was worth the money.
Thanks in advance!
John
Just brought a new van and on the way home the battery started boiling over. As it has been sitting for a while I just assumed it was old and replaced the new battery, however the same thing started happening when I fitted the new one. Placed a multi-meter on it and its putting 17V into the battery at idle. Am I correct in thinking the alternator has had it? I've replaced it for a Lucas 65Ah motor for a 1.9L petrol van. Going to be using a leisure battery so assume the alternator upgrade was worth the money.
Thanks in advance!
John
Re: Borked Alternator?
Sounds like the regulator needs replacing.
https://www.brickwerks.co.uk/t3-parts/e ... 14-5v.html" onclick="window.open(this.href);return false;
https://www.brickwerks.co.uk/t3-parts/e ... 14-5v.html" onclick="window.open(this.href);return false;
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Re: Borked Alternator?
Thanks, seems a easy fix and a lot cheaper than a new alternator. Will try it first!
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Re: Borked Alternator?
So replaced the voltage regulator and it’s still putting 17-18 bolts through to the battery. Anything else it can be or definitely the alternator?
Re: Borked Alternator?
Are you confident your volt meter is accurate ? If not ,do you have another car you can try it on?
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Re: Borked Alternator?
I’m not confident in the volt meter, however it is being accompanied by a strong hissing/bubbling sound. We did try the new regulator with the old battery as it seemed new and is holding a charge well, but appreciate that the battery could also be the issue. We have a new one that I will put on tomorrow, however it also hissed/bubbles prior to the regulator changing.
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Re: Borked Alternator?
Just to be clear on this
You changed the brush pack in your alternator for a new one and you are still getting more than 14.5v out the back of the alternator?
You changed the brush pack in your alternator for a new one and you are still getting more than 14.5v out the back of the alternator?
Steve
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Re: Borked Alternator?
I changed the voltage regulator, the part with the two small spring pieces of metal. As far as I am aware I have not changed the brush pack unless they are the same thing
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Re: Borked Alternator?
Oh and apologies the 17-18 volts is on the battery terminal, not the back of the alternator
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Re: Borked Alternator?
Possibly the battery is shorted internally ? What is the battery voltage reading after it has been standing 12 hours or more?
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Re: Borked Alternator?
I’ve since replaced it with a new battery and it’s still doing the same thing unfortunately.
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Re: Borked Alternator?
Oh dear!
As the new regulator hasn't changed anything it must be something internal to the alternator - as to what could cause high voltage like that I am at a loss other than the diodes have failed, whilst repairable with difficulty for the average guy/gal a new alternator is the easiest answer now.
As the new regulator hasn't changed anything it must be something internal to the alternator - as to what could cause high voltage like that I am at a loss other than the diodes have failed, whilst repairable with difficulty for the average guy/gal a new alternator is the easiest answer now.
1.6D 2019 VW T-Cross
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5̶0̶8̶d̶ ̶M̶e̶r̶c̶
200hp VW T6
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Re: Borked Alternator?
There is no split charge system? Thinking there might be a second battery connected in series that the previous owner had a switch or something somewhere you don't know about. It's very unlikely, but since you just got the car you never know.
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Re: Borked Alternator?
There were two batteries out in series but I have disconnected them all and it’s still doing it. Couldn’t find a split charge either.
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Borked Alternator?
Novastrike wrote:I changed the voltage regulator, the part with the two small spring pieces of metal. As far as I am aware I have not changed the brush pack unless they are the same thing
On the back of the alternator, yes .
The spring bits as you call them are the brushes.
https://www.brickwerks.co.uk/voltage-re ... 14-5v.html" onclick="window.open(this.href);return false;
Steve
tel / txt O7947-137911
________________
1989 2.1LpgWBX HiTop Leisuredrive Camper
1988 2.1 Caravelle TS TinTop Camper
tel / txt O7947-137911
________________
1989 2.1LpgWBX HiTop Leisuredrive Camper
1988 2.1 Caravelle TS TinTop Camper