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Gary, ASE Certified Technician
Category: Vauxhall
Satisfied Customers: 2331
Experience:  Senior Technician
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I have a insignia 2.0 CDTi, 2011 plate. Turbo started

Customer Question

Hi. I have a insignia 2.0 CDTi, 2011 plate. Turbo started whistling very loud. No loss of power and no smoke. Had a recon turbo fitted and intercooler, rad pack. Still sounds like a siren. No fault codes showing up. At a loss what it could be. Thanks Rob
Submitted: 1 year ago.
Category: Vauxhall
Expert:  Gary replied 1 year ago.

Hello! My name is Gary.
Welcome to JustAnswer.
I'm reviewing your question now, and will post back with a reply shortly.

Expert:  Gary replied 1 year ago.

I'd be looking at the oil feed pipe for blockage.

Sounds like the turbo is about to fail again.

Poor oil change history can contribute to this in turbo engines.


Customer: replied 1 year ago.
Just had full service cost £475 about 2 week before first turbo went. Checked oil feed pipe not blocked
Expert:  Gary replied 1 year ago.

Hi Rob,

Can you describe the noise a bit more, you say sounds like a siren?

Squealing, air pressure leak etc?

Factory airfilter?


Customer: replied 1 year ago.
A high pitch screen. Took it a 40 mile run up motor way last night, gone out this morning and not as loud. Do you think it could be dog and it now as been regenerating. No where near as loud now. Checked oil and coolant all fine
Expert:  Gary replied 1 year ago.

I wouldn't associate any noise with DPF regeneration.

I would contact your recent repairer.

Noises happen from abnormalities, they don't fix themselves.

I have replaced a few turbos, and none have given me grief.

Yours is either overspeeding, or there is a boost leak.

Without hearing it for myself, it is difficult to say.

Hope this helps.


Expert:  Gary replied 1 year ago.

Hello again,

Do you need any further help?

I hope my advice has been of assistance to you.

Kind regards