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Help. New Alternator. Worse Than Old One


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#1 johnS

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Posted 22 June 2012 - 12:42 AM

Hi,

Just had my alternator chanegd along with the aux belt. I'm very annoyed because it's charging less than my old alternator, and the power steering feels heavier than before it was done. I've noticed in the dark that the lights flicker when the a/c clutch clicks on and the voltage goes down.

Had a whining sound before the alt was done (thats part of the reason I changed the alt) that went away for a bit once the belt and alt was done, but the whining sound came slowly back after about a 100mi.

What is this? Been searching around on the internet and I have come up with it possibly being some tensioner or pulley for the aux belt.

And since it seems the garage made it worse, what can I do to avoid paying the aux belt to be redone.

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#2 NorthSussex

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Posted 22 June 2012 - 08:31 AM

Hi,

Just had my alternator chanegd along with the aux belt. I'm very annoyed because it's charging less than my old alternator, and the power steering feels heavier than before it was done. I've noticed in the dark that the lights flicker when the a/c clutch clicks on and the voltage goes down.

Had a whining sound before the alt was done (thats part of the reason I changed the alt) that went away for a bit once the belt and alt was done, but the whining sound came slowly back after about a 100mi.

What is this? Been searching around on the internet and I have come up with it possibly being some tensioner or pulley for the aux belt.

And since it seems the garage made it worse, what can I do to avoid paying the aux belt to be redone.


Take it back to the garage and complain, get it fixed under warranty.

#3 artscot79

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Posted 22 June 2012 - 09:09 AM

its not unusual for an alt to whine when a loads put on it many will say its faulty thats just rubbish the more current it puts out the harder it works. as for the alt is it the correct one?have the garage check it again and if no faults can be found youll have to take it to ford and have it examined

#4 johnS

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Posted 22 June 2012 - 11:27 AM

Is it possible for the belt to bed in a bit? And I checked the belt and pulkeys and it all seems fine.

When the air conditioning clicks on(I think) the car shudders a bit then the voltage comes back up to 14.2V

Any ideas? Dont want to take it back yet because I dont think the belt is bad.

Voltage has been as low as 12.7V with engine running as well

#5 artscot79

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Posted 22 June 2012 - 12:39 PM

been out and put mine into dash test mode went to battery voltage and did this at idle

headlights front and rear fog lights on 14.2 v
front heated screen only 13.5v
front screen and headlights 13.2v
everything on thast fan on level 4 headlights- fog lights front and rear- stereo main beam etc 12.8v
air con only no shudder just the click of the compressor and 14.2v

#6 johnS

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Posted 22 June 2012 - 01:23 PM

Thanks, the voltage seems fine now with the air conditioning off. Could it be posdible the wrong belt was fitted?

#7 johnS

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Posted 22 June 2012 - 08:58 PM

It's definatly the belt. The power steering feels heavier. What could it be because the belt looks and seems fine

#8 johnS

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Posted 23 June 2012 - 07:02 PM

Anyone

#9 jeebowhite

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Posted 25 June 2012 - 03:28 PM

It could be, but at the end of the day, the belt just goes round and round, you could fit a rubber band and the only burdon would be if it is gripping or not. Check the belt is fitted in line with the pulleys, if its inline, it could well be a faulty alternator. I always noticed that on my Focus the headlights dipped a little when I put on heated windscreens or AC...

#10 johnS

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Posted 25 June 2012 - 04:55 PM

It could be, but at the end of the day, the belt just goes round and round, you could fit a rubber band and the only burdon would be if it is gripping or not. Check the belt is fitted in line with the pulleys, if its inline, it could well be a faulty alternator. I always noticed that on my Focus the headlights dipped a little when I put on heated windscreens or AC...


I dont see how a faulty alternator would also affect the power steering heaviness

#11 NorthSussex

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Posted 25 June 2012 - 05:04 PM

John, it's confusing you having 2 posts on the same topic. There is some great technical advice from members on this forum, my technical knowledge on cars is limited so I can't help you with that, but one piece of advice I can give you is, get some lessons in assertiveness, maybe at your college, (I believe you are a student),that will help you overcome a lot of your problems, sorry to sound like a Dutch Uncle but it will get you through life without all the worry.

#12 johnS

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Posted 25 June 2012 - 05:21 PM

John, it's confusing you having 2 posts on the same topic. There is some great technical advice from members on this forum, my technical knowledge on cars is limited so I can't help you with that, but one piece of advice I can give you is, get some lessons in assertiveness, maybe at your college, (I believe you are a student),that will help you overcome a lot of your problems, sorry to sound like a Dutch Uncle but it will get you through life without all the worry.


lol yeah you are right, I just dont like paying and then it to be worse than before

#13 NorthSussex

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Posted 25 June 2012 - 06:47 PM

lol yeah you are right, I just dont like paying and then it to be worse than before


Go for it mate, don't let them get the better of you, good luck. :)

#14 johnS

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Posted 25 June 2012 - 07:39 PM

Go for it mate, don't let them get the better of you, good luck. :)


Dont know how to go about it, got any tips?

Dont know how i'd be able to prove it

#15 NorthSussex

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Posted 25 June 2012 - 10:24 PM

Dont know how to go about it, got any tips?

Dont know how i'd be able to prove it

Just take it back and say it's still not right, they won't bite your head off.

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