Hissing alternator

[iamnewhere]

Hello! I think i'm having a problem with my car's alternator.when i start the engine i hear a hissing sound on the left side where the alternator is. But when the engine warms up, the sound decreases or disappears. I tried googling the problem but most say that the sound is constant.i recently changed my belts and had them adjusted and re-adjusted but the sound is still there.

[joey36b]

Maybe a vacume leak somewhere in the idle-up side kung malapit siya sa alternator. Pabago-bago ba sir ang idle?


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[joey36b]

Kung alternator whining sound and constant nga


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[iamnewhere]

Maybe a vacume leak somewhere in the idle-up side kung malapit siya sa alternator. Pabago-bago ba sir ang idle?


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Thanks sa reply sir. Di naman po pabago-bago idle. And yung sound po is marinig sa start ng engine pero pag nagamit na halos wala na sound,minsan bumabalik hissing sound but di ganun kalakas.

[joey36b]

Mileage mo sir? Auto?


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[dr. d]

Hello! I think i'm having a problem with my car's alternator.when i start the engine i hear a hissing sound on the left side where the alternator is. But when the engine warms up, the sound decreases or disappears. I tried googling the problem but most say that the sound is constant.i recently changed my belts and had them adjusted and re-adjusted but the sound is still there.

it would be nice to know what car we are talking about.
but my very wild guess is, your idler bearing is about to die.

[Janemar]

Hello! I think i'm having a problem with my car's alternator.when i start the engine i hear a hissing sound on the left side where the alternator is. But when the engine warms up, the sound decreases or disappears. I tried googling the problem but most say that the sound is constant.i recently changed my belts and had them adjusted and re-adjusted but the sound is still there.

Tangalin mo belt ng alternator, pag nawala ung hiss edi sa alternator nga and pa check mo na lang baka bearing...

[joey36b]

Magagandang idea na nasabi sa taas[emoji121]🏻️[emoji121]🏻️[emoji121]🏻️

Aircon pulley, idler, alternator, water pump, power steering pump puro maybearing na pwede tumunog sila. Carbon brush pagmaikli minsan tumutunog din sa unang start, power steering pagkulang fluid maytunog din. Vacume canister ung sa emission maytunog pagstart at pagengine-off pagluma na. Fake na fanbelt pagmahigpit masyado ung dulas nya sa pagstart maytunog din hehe


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[dr. d]

tongue-in-cheek...
kapag herring sound, siguradong basag na bearing na.

apologies... couldn't resist..

[makinao]

Use a stethoscope (or improvise with a plastic tube) to localize the sound.