What is this pulley and why is it making an annoying whistle?

[Timmos]

The name really speaks for itself.. I've pinpointed the source of a rather annoying whistling coming from my engine bay and it seems to be coming from that pulley(circled in the photo). Can anyone tell me A) what it is and B) how do i fix it?

Cheers.
Tim

[MagiTEK]

ecotec engine.. Im going to go out on a limb and say its the air con compressor?. Im a bit drunk, but looking at my own ecotec, thats what i assume it is, since its hanging off the side.

[one_and_only2004]

I'm going to say air conditioner? Just went and looked at mine.

[acarmody]

Definitely is air-con compressor.

[a1k3m1]

be your air con dude, does it make the noise when its turned on off or both?

[Timmos]

Thanks for the replies! The noise is always there regardless of the air con being on or off.

[-scyth-]

maybe time for a new belt.

[0081]

Does it change in sound with the rpm of the motor?? i had my pulley/clutch replaced under warranty as the it was faulty
and yes its the AC

[vsl67]

I had the bearing shit itself in the aircon pulley in my Vp ,it sounded like a low power steering fluid noise and was there reguardless if the aircon was running I managed to replace the bearing while the compressor was in the car

[Timmos]

Doesn't change with rpms. Sounds similar to what vsl67 described. If it helps I'll record the vid and post on YouTube

[liamvys]

just replace them all i got mine done like 1 weeks ago was making the noice etc... if u dont change them fan belt can come of.. cost me 20 bucks per pulley plus labour so like 380 all up

[TI3VOM]

Make sure it is that one I just had my Idler pulley go which is the small one above the one you have pointed out squealed like a bitch bought a new one for $32 fitted it myself all good now.

[Timmos]

Make sure it is that one I just had my Idler pulley go which is the small one above the one you have pointed out squealed like a bitch bought a new one for $32 fitted it myself all good now.

hmm that's good to know.. i think i'll replace it anyway being $32.

Well i've noticed the noise comes and goes.. i dont think its warmth related.

[Clutchy]

hmm that's good to know.. i think i'll replace it anyway being $32.

Well i've noticed the noise comes and goes.. i dont think its warmth related.

fair chance it will be the little 1 above the aircon as id say it would change with the aircon on or off if it was the aircon.

[Timmos]

I'll try and change it this weekend.

Any tips how to remove and replace?


http://cgi.ebay.com.au/COMMODORE-VT-...item53e0d4d39b < should i get this

[liamvys]

yeh replace all of them once one goes the rest should follow

[Chrisvyss]

Before you go changing random pulleys chasing a whistle, Sparay a little crc on each one with engine running to isolate the one thats making the noise. saves time and money. Due to it being a single belt drive vibrations and nosie can be transmitted kinda like a ventriloquist throwing his voice, no point chasing your tail. Thats advice given to me by a trained holden mechanic, so id thought i would share .

Cheers

[Timmos]

Thanks and yeah good advise.. i'll do that...

My mechanic mate showed me a little trick to isolate noises like this, he got a long flathead screwdriver and placed the end of the head on the bolt of the pulley....you can hear the noise travel through the screwdriver if you put your ear to it.
If that does work, it's apparently the pulley 2 up from the aircon compressor..

[Chrisvyss]

yup it does work kinds like a stethescope which you can buy for a few bucks at supercheap handy for lots of things