Terracan - Induction noise?

Hi Guys, newby here and with a question ....

2006 Terracan 2.9 CRDI Auto 65k miles....

Just bought it and had it serviced (cam belt, new water pump and filters etc)

Noticing a sound under engine load - somewhere around either a rubbing or sucking sound, constant when you hear it, doesn't change with speed or engine revs (possible gets slightly louder with more revs)

Only occurs under load (re the engine on the drive as much as you like no noise)
Tickover no Nosie
engine under minimal load at steady speed no noise
descending hill at same speed and engine revs - using engine breaking - no noise

accelerate - noise...
Left off - noise stops

almost like its when the turbo is boosting?

seems to be from front right of vehicle and doesn't get louder if you open the window.....

Garage are not getting anywhere...

Is audible induction noise normal?

thanks in advance

Never had a Terracan but have had a few vehicles with turbos and with most you will hear a bit of whistling sound under acceleration. If that is what it is, just make sure the air intake isn't letting in unfiltered air that could damage the Turbo or engine.

I know there are a couple of people on here who have had Terracans who might be able to help more.

Thanks,

Had quite a few turbos myself both petrol and service, ncluding lifted l400's and turbo bricks, this isn't awhistle like turbo spooling but it could be a sucky inlet resonance type noise

Garage have had a look today and can't find anything ....

Again never had a Terracan but could it be the hoses's delamination, just a quess,