Alternator Chirping - Defender Source
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  #1  
Old August 4th, 2010, 02:32 PM
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Greg
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Alternator Chirping

My alternator is chirping, actually more like whistling. I am sure it is not the belt, and it goes away temporarily if I spray just behind the pulley with WD40, leading me to think the bearings are going/gone.

Time for a new one?

Any recommendations on which one and from whom to buy this?

Thanks in advance,
Greg
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  #2  
Old August 4th, 2010, 02:40 PM
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Robert/Mazzarella
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Mine was making the same noise back in Jan. I took it to a local place (arlington armature) and they tested it for me. The bearing was shot and I think he said the stator was going. For the 2 months leading up to that my tachometer was really inconsistent, sometimes it failed to register any rpms at all. I put the new alternator in and the whirling sound went away and the tachometer now reads like it should. I bought mine from the shop, but I saw them from the usual defender vendors online.
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Old August 4th, 2010, 02:55 PM
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Whatever you do, buy a magnito mirelli [sic] not a bosch or autozone one.
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  #4  
Old August 4th, 2010, 03:28 PM
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Kelby Saxton
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I am on my third A/C Delco reman mirelli in 2 months. First one would not charge, the second one the bearings failed after less than 2 months and the third one has been on since my lunch break on Monday. lucky for me I am GM parts guy so the parts warranty is in my hands.
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Old August 4th, 2010, 04:05 PM
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Keith Kreutzer
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  #6  
Old August 4th, 2010, 04:10 PM
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No remans!

Ron
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  #7  
Old August 4th, 2010, 08:04 PM
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Don Bunnell
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How can you tell if the alternator is bad or is going bad? I have a weird chirping sound and reading this thread I am thinking maybe it could be the alternator.
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  #8  
Old August 4th, 2010, 08:11 PM
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Scott
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Why not take it to an alternator shop and have them fix it, and while they are in there rewind it to a higher output.
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