High pitched whining noise coming from Engine Bay

[Fr3ak+--]

doubt it guys

 

[rokkz]

Guys

How free are the idler pulleys meant to be?
Removed the belt and the single idler(with grooves) spins freely, however the other two with no grooves, while not totally stiff, don’t continue spinning when made to.
The frequency of the whine appears to be to high pitch to be mechanical, but will continue to fault find.

Cheers

 

[accentstencil]

Ideally, the idler pulleys should spin freely. Spraying with WD40 might free them up. It would be better to remove them so you can spray both sides.

 

[rokkz]

Changed the drive belt with no change, in whine.

Before changing I check all idlers , pulley's.

Although the groove less idlers where a little resistant, they appear ok,
however when spinning the water pump although it was fairly free, it
did make a grinding/bearing type noise. I'm not convinced this is the cause
of the high pitch whine heard within the cabin, but it sound like its still up for replacement.

You tube link of water pump noise
YouTube - Vy waterpump

Appreciate your advice

 

[rokkz]

Depending on how high pitched the noise is, could be a vacuum leak.

Blown, I think you maybe right, after changing a few settings on the climate control(berlina) previously and now, the noise goes for a couple of days then returns.

It got me stumped, as it sound electrical if anything, as mentioned before sound like humming a siren at a amature football match

mmmmmmMmMmMMMMMMMMmMmMmmMmmmmmmm as accelerating and then fades away even as the rpm decreases and engine speed increasing from about 60k's onwards.

Cheers

 

[Nuffy]

Have the same problem in my VX.... I guarantee you it's the same noise - a high-pitched whine (almost a squeal) that comes in when accellerating and falls/disappears when low on revs. Have been informed it's likely the water pump needing changing - mine's done 210,000k's. But will investigate the vaccuum leak now as well.

Can you let me know if you've solved your problem.

Cheers

 

[south21]

Run the engine without the belt on for a few seconds if no noise then you will know if it's one of the pully wheels or alternator bearing or water pump.

 

[Heffer_Slayer]

Hey guys, anyone end up fixing this annoying whine?
I have it on my VT as well.
done 145,000 km

 

[5ivespeed]

i sometimes get this. if you have an amp it could be the remote wire isnt connected properly. or the re could be something wrong with the negative connection with your battery chck the wire. and with your splits then it might be the crossover box thats all i can think of with electrical problems.

 

[Gazzer]

I have the same problem.
Im wondering if a pulley bearing often needs replacing on these motors, it doesnt sound like the water pump to me.
Oh and mine has only 130,000kms.