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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[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]

Kung alternator whining sound and constant nga


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[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.

[iamnewhere]

Thank you sa mga reply and tips. It's an old pajero po 2000 fieldmaster with 75k mileage.2nd hand na po namin nakuha. May vault guage pag di pa nstart engine nasa 11v tapos pag napaandar unti unti na akyat sa 12v then dun na magstay.motolite excel yung battery but 9mos pa lang to. Tried to localize the sound using steth mukhang sa alternator nga galing. Mukhang di pwede ibyahe to.

[joey36b]

Thank you sa mga reply and tips. It's an old pajero po 2000 fieldmaster with 75k mileage.2nd hand na po namin nakuha. May vault guage pag di pa nstart engine nasa 11v tapos pag napaandar unti unti na akyat sa 12v then dun na magstay.motolite excel yung battery but 9mos pa lang to. Tried to localize the sound using steth mukhang sa alternator nga galing. Mukhang di pwede ibyahe to.

Hirap pa naman sumilip jan mataas na masikip pa hehe.
Ano ba klase ng tunog sir? Grinding metal o hangin ang dating?may fieldmaster kasi na ang alternator mayvacuum pump sa likod baka ganon ang sainyo.



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[Janemar]

Thank you sa mga reply and tips. It's an old pajero po 2000 fieldmaster with 75k mileage.2nd hand na po namin nakuha. May vault guage pag di pa nstart engine nasa 11v tapos pag napaandar unti unti na akyat sa 12v then dun na magstay.motolite excel yung battery but 9mos pa lang to. Tried to localize the sound using steth mukhang sa alternator nga galing. Mukhang di pwede ibyahe to.

Just sharing, farthest I drove with a broken alternator(battery light lits up and alt not charging) was from Lucena City, Laguna upto Apalit, Pampanga. From the time it lit up, planed my route and palipas oras muna to ease traffic on road. Turned off all electricals. This is on a car with computer box pa and a 2sm battery only. I think pajero fm has no ecu and uses 3sm battery. 12mn umalis ako SPC, dumating ako bahay sa apalit 1:30am+

Fully Charged the battery overnight and the following day, from apalit to manila, dinala ko oto to have the alternator replaced bnew. Brought a spare battery as well just in case ma trapik sa edsa at malow batt battery and mamatay ECU/engine.

[iamnewhere]

Thank you sa tips mga sir.had it checked sa reys and ok ang karga ng alternator nasa 14v on idle and 13v with aircon. Pero last monday 13v idle and 12v nung may ac. Binuksan at pinalitan bearing kasi rinig na yung ingay. Nung kinabit ulit 14v sa idle and 13.5v to 14v with ac. Inuwi ko sa bahay pero nung pinaandar ko afterlunch parang di ulit kumakarga..nilibot ko test and normal ba na pag idle with ac and headlights on nasa 12v lang? Tapos pag nilagay sa Drive ganun din 12v lang kailangan pa tapakan accelerator para umakyat ng 13.5v, hayaan lng bumabagsak talaga sa 12v minsan 11v pa..

[joey36b]

Kung grinding metal ang dating bearing kung medyo pino at mahina paubos na carbon brush malapit na tumama ung spring or copper wire sa armature. Isip ko lang yan sir hehe pacheck mo na lang. hangang charging pa siya pagawa mo na lang cheap lang bearing at carbon brush. Pagnasunog rectifier eh mahal.


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[iamnewhere]

Kung grinding metal ang dating bearing kung medyo pino at mahina paubos na carbon brush malapit na tumama ung spring or copper wire sa armature. Isip ko lang yan sir hehe pacheck mo na lang. hangang charging pa siya pagawa mo na lang cheap lang bearing at carbon brush. Pagnasunog rectifier eh mahal.


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More on pino ang sound sir tapos pag medyo na warm up na engine mas humihina na siya. Di ko nga magamit kasi baka lalo masira alternator. Sa Monday ko pa mapa check kasi sa reys electrical ako magpacheck eh sa Monday pa sila bukas. Wala na kasi ako alam iba autoelectrical na maganda dito marikina hehe.

[joey36b]

Medyo mahal sa reys but sure ball naman gumawa


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[baludoy]

Ako about 2 yrs ago nang nagloloko alternator ko ginawa ko pinabaklas ko sa suki kong electrician/mechanic sabay tinakbo ko sa yock's electrical shop sa edsa, qc. All the way from las pinas bro. Nakakatakot kasi tirikin sa gitna ng biyahe. Ayuz na ayuz naman kinalabasan ��

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[dr. d]

Ako about 2 yrs ago nang nagloloko alternator ko ginawa ko pinabaklas ko sa suki kong electrician/mechanic sabay tinakbo ko sa yock's electrical shop sa edsa, qc. All the way from las pinas bro. Nakakatakot kasi tirikin sa gitna ng biyahe. Ayuz na ayuz naman kinalabasan ��

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siguro kung ako, ay tinakbo ko kay yock's, at kay yock's ko pinabaklas.
heh heh.

[baludoy]

siguro kung ako, ay tinakbo ko kay yock's, at kay yock's ko pinabaklas.
heh heh.

no way na ko tatakbo ng kotse na may alternator na nagpaparamdam. nangyari na iyan sa akin during my gung-ho-didn't-know-any-better-younger-days...at dahil sa katangahan inabutan ako sa coastal road during my late evening drive home. doon ko unang naranasan talaga mag break into cold sweat