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#1
06-30-2005, 05:33 PM
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Alternator on the way out????
I have begun to hear a whine that rises and drops with engine rpm. At first, I thought could this be the torque converter making this sound, or maybe the turbo? The sound seems to be coming from the alternator, but without having disconnected the serpentine belt in order to render the alternator motionless, I'm not fully sure!
Is this typical of an alternator, and or, regulator and it's brushes, to make this sound when it's getting ready to check out? 
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#2
06-30-2005, 06:00 PM
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Use an old broomhandle (or other hardwood stick) to identify the source of the noise. Put one end to your ear and the other end to somewhere you think the noise is coming from. Then move it around. A plastic air tube works good too.
__________________
'82 300SD - 361K mi - "Blue" "Good judgement comes from experience. Experience comes from bad judgement." listen, look, .........and duck.
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#3
06-30-2005, 06:10 PM
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Miigt be the bearings, but the brushes don't make any noise. Your accessories like windows and wipers get weak when the brushes wear down.
__________________
'83 240D with 617.952 and 2.88 '01 VW Beetle TDI '05 Jeep Liberty CRD '89 Toyota 4x4, needs 2L-T '78 280Z with L28ET - 12.86@110 Oil Burner Kartel #35 http://i16.photobucket.com/albums/b1...oD/bioclip.jpg
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#4
06-30-2005, 11:01 PM
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My alt made a whine when the bearings were dieing. My water pump died the following week.
__________________
1999 SL500 1969 280SE 2023 Ram 1500 2007 Tiara 3200
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#5
06-30-2005, 11:29 PM
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The alternator in our '83 made no noises at all....then it seized!
 With 0 warning.
__________________
-diesel is not just a fuel, its a way of life-  '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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#6
07-01-2005, 09:16 AM
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You might be able to find it with Petes poor boy stethoscope. I've used one many times.
The only way to know for sure is remove the belt and spin the accessories. Make it a habit that ANY TIME the belt is off spin ALL rotating items to make sure they are free and smooth. Good luck,
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