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Old 11-30-2014, 07:00 AM
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Default Very cold weather and alternator

Snowed on Friday and lately it's been very cold here....as low as 18 at night, maybe 30's during the day. Noticed I got quite a bit of alt whine thru my speakers. But, only does this during winter months. Does cold weather have an affect on alts as well as batteries too?
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Old 11-30-2014, 09:27 AM
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Temperature absolutely has an effect on Electron flow, it's odd that it would cause more noise to be introduced though. Batteries require a chemical reaction, heat speeds up that reaction and lack of heat slows it down. The alternator should be running more efficient with the colder weather as heat related resistance is at a minimum. When conductors get hot their resistance increases which creates more heat. Why it's making more noise when cold has me stumped, could it be the brushes are not making as good of contact or regulator running colder than normal? Or something entirely different all together.

On a side note; I have noticed that one of my amps made a buzzing noise during cold weather, from the actual amp not the output of the amp. Once it warmed up from use it would go away.
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Old 12-15-2014, 07:41 PM
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It's not an aftermarket alt....so still makes noise sometimes.

Driving me crazy...can't drive around and listen to music while speakers are whining/making noise.
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Old 12-15-2014, 07:51 PM
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I've noticed that as well some days it does it some it don't, an my serpentine(spelling) makes this weird noise as well not sure if its because its cold or my belt it 2 sizes smaller then stock.
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Old 12-15-2014, 08:27 PM
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Quote:
Originally Posted by Austin175 View Post
I've noticed that as well some days it does it some it don't, an my serpentine(spelling) makes this weird noise as well not sure if its because its cold or my belt it 2 sizes smaller then stock.
if your belt/pulley on your alt is making a very annoying high pitch squealing once you start your vehicle, it's a lose pulley. Or could be a lose belt too. There's a trick to quiet the belt by putting liquid on it...saw it on youtube.
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Old 12-15-2014, 08:56 PM
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No its not alt whine but i do get that when i start it up then goes away, its after i start it up its like a ticking noise an if i push on the gas the ticks get more rapid but its not all the time an just recently started doing it when we got into the colder weather.
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