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Technical (156)
 Alfa Romeo forum : Technical (156)
Subject Topic: Possible Alternator problems Post ReplyPost New Topic
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sal2007
Junior Alfisti
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Posted: 26 June 2007 at 10:30 | IP Logged Quote sal2007

Hey Guys,

I did a search on Alternators and could not find anything. So I need all your expert advice.

I have recently changed my cambelt with tensioners pulleys, idle bearings, water pump etc. Ever since that day the Car has had a funny whine/whur between 1200rpm to 3000rpm coming from the belt area.

I have taken it back to the stealers about 3 times to double check their work for maybe an overtightened cambelt with no success. They said all was good. Not for me those f**kers... . I have since done 10000 kms and the sound is still there.

My point is if it ain't the cambelt, Could it be maybe an alternator bearing.

I have noticed when the fan kicks in past 90 degrees that the dash lights and headlights dim pretty badly and when I rev up it brightens up.

Is this normal?

I have a 156 v6 2002 model non facelifted. Can anyone confirm?

The sound is starting to bug me and I am wondering if the aircon compressor bearing could be f**ked also. When you rev the engine, do all these parts spin with RPM? Turning the aircon on and off has made no difference.

Thanks to all you great guys that help keep this forum alive and kicking..

Edited by sal2007 on 26 June 2007 at 10:30
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Robjb
Junior Alfisti
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Posted: 26 June 2007 at 17:54 | IP Logged Quote Robjb

Chances are its auxillary tensioners or alternator bearing. I thought the tensioner had gone on my auxillary belt but on closer inspection ,found that the alternator bearing was worn.Best way to check is to use a lever of some sort to put tension on the belt and then release again.If the noise lessens then its one of these.Remove auxillary belt and check tensioners.If no movement there its probably the alternator bearing.That will mean new alternator i'm afraid.
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sal2007
Junior Alfisti
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Posted: 27 June 2007 at 00:28 | IP Logged Quote sal2007

where is the alternator located on the v6 guys?
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okenora
Junior Alfisti
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Posted: 27 June 2007 at 03:25 | IP Logged Quote okenora

It's not uncommon for new belts to whine a bit, but not a loud whine tbh. Would you call it loud or not ?

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sal2007
Junior Alfisti
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Posted: 27 June 2007 at 03:32 | IP Logged Quote sal2007

its not loud loud....but it sounds like whine, I can't explain. I just don't get it, why does a new timing belt on a new car not make this noise?
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okenora
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Posted: 27 June 2007 at 12:32 | IP Logged Quote okenora

Good point about the new car belts....dunno.....but it's not the first time I have heard people complain about a whine off new belts.

Maybe it is because the new car belts are tensioned by a machine but in general I would say the replacement belts are tensioned by hand or a mechanics "eye" ? Maybe it has something to do with the replacement belt running on old sprockets ? Maybe the replacements are even slightly different to the OEM's (doubt that one tbh)?

For your own peace of mind though a quick trip to the dealers/independent that you normally don't use, for a second opinion, would not hurt and ask them to have a listen and see what they say. Most won't charge for this quick inspection.


Edited by okenora on 27 June 2007 at 12:34


__________________
2003,2.4JTD,Nero black.
FITTED:Remap,Supersprint exhaust,CDA,Splitter,TV,DVD,DVB-T,PS2,Blaupunkt/Kenwood/Foca l ICE,HID GTA lights,Lexus rears,Red dots.
WAITING:Koni sports kit
PLANS:Alloy tray
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