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Old 07-31-2008, 01:49 PM   #1
dirtbiker348
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Alternator Question?

My dad keeps telling me the alternator is going because he can hear it when i start the car. How can you tell if it's going, and if it is should i buy the OEM one or go with this one http://focus.c-f-m.com/index.asp?Pag...&strVarSel=175 ?


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Old 07-31-2008, 08:27 PM   #2
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Take the belt off, and spin the alternator by hand. If it makes a "wuurrrr" sound, the bearings are on the way out. if it spins smooth and quite, then it's somthing else making the noise. Could also be timing belt idler pully or water pump.
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Old 07-31-2008, 08:38 PM   #3
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go get it checked out by your local autozone, advanced auto ect... they can hook it up and tell you what amps it's putting out. also you can do what jeffescortlx said^^
and go by feel more then anything. see if you hear/feel grinding. but really the only way you'll know if it's going out is you need to see what it's putting out.

Other then that it could be just an alt that makes a funny noise lol or something else for that matter.
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Old 07-31-2008, 11:43 PM   #4
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Is the battery light on? When my alternator was dying, the battery light came on.
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Old 08-01-2008, 11:22 AM   #5
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No battery light, but i will take the belt off and turn it by hand later, thanks guys.
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Old 08-01-2008, 12:38 PM   #6
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yeah if ur alternator was goin...ur battery light would be on. i just changed mine out not to long ago and the light was on and the old alt. was makin a whirring sound when i turned the car on.
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