Strange warbling whistle?

witchy

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Astra G 2004 1.7 CDTI SXi

I've noticed a weird whistle noise coming from my engine, it only happens as I accelerate, it's more apparent under gentle acceleration.

It's sort of mid pitched and warbles at the same time.

Turbo?

Nothing?
 
Astra G 2004 1.7 CDTI SXi

I've noticed a weird whistle noise coming from my engine, it only happens as I accelerate, it's more apparent under gentle acceleration.

It's sort of mid pitched and warbles at the same time.

Turbo?

Nothing?
possible turbo noise
 
Does it do it with your radio off? If not then it could be interference from the alternator.
 
Does it do it with your radio off? If not then it could be interference from the alternator.

My speakers are inside the car, not under the bonnet ;)

It happens all the time mate, though I can't say i've noticed it for a few days.

If my turbo had a hole, would i notice a drop in power?
 
Warbling sounds can also be a sign of a worn /nearly dead turbo or one thats lost one of its fan blades.

I'd go to my trusted local independent and ask them to have a listen.

I had a Galaxy Tdi that threw its turbo fan into the engine inlet, expensive noise followed :(
 
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