Siren noise!!!???

[clubsport]

Only just noticed but I appear to have a noise similar to a distant police siren...I get this starting at around 1500 rpm.
Car runs fine...I seem to be getting 25+ MPG (standard) but there is this siren like whizzing/whoosh noise...not overpowering just there!

Having read through the forum I get the impression it could be a pipe leak, other than checking the DV's and "F" pipe is there anything else that may be the cause....or is this nothing to worry about?

Thanks for your wise words

[Julesm]

I may be wrong but a siren type noise is usually associated with possible turbo wear ........do a search using "siren".......

[dazzer]

Is it more prevalent when the engine is cold?

[dazzer]

Is it more prevalent when the engine is cold?

[eddiecrawford]

does the siren take a few seconds to stop/slow down after engine turned off?

if so, one of front electric fans has failed or is jammed with a bit of cabling. makes one of the others go twice as fast, hence noise

ignore this if it does not happen as above...

[clubsport]

Thanks for the replies chaps, It only appears on light acceleration, sounds like turbos spooling as they come in at 15-1800rpm....maybe normal....there are no noises on tick over or after the engine is turned off.
No oil is being used or signs of smoke, the engine rarely gets pushed above 3-3500rpm.

[KayGee]

My turbos weren't noticeable until I put on DP's and catback now can here them clearly. Turbos sound like dentist drills when knackered.

[NeilMc]

In the words of the infamous VandyS4 (with regard to turbo failure): If you're not sure if you have the siren noise, you don't have it, it sounds like 10,000 screaming babies in the engine bay.

All turbos make a slight siren noise when spooling, I wouldn't worry too much about it.

[clubsport]

Thanks, having also run a "siren search" on this forum, I have now concluded it is completely normal....just wondered, all part of learning about these cars.

[maxxximus]

the engine rarely gets pushed above 3-3500rpm.

Youre clearly not gettin the best out of your motor. When warm the engines designed to be driven hard.

As for turbo noise - youll know when theve blown

[clubsport]

I enjoy the torque and never rev it really, characteristics of a lazy V8!
(i know it's a blown V6 )

Never thought the turbos were giving up, just wondered if it meant there was some pipe leak somewhere.

I must try to get the car on a Vag com diagnostic reader sometime, just for peace of mind

[stan]

Mine's been doing it since I bought it 3 years/40000 miles ago. For the first few weeks I kept looking for the blue flashing lights.

[Jez]

One of my turbos whines. It's noticable when the engine is cold, but still present when warm. Starts at 1800 rpm then fades out at 3000 rpm.

Think I might start putting some money aside for when it decides to give up the ghost...