V70: Engine - D5 Turbo Whistle...

Daim · Apr 2nd, 2024, 11:02

Hey guys,

A few questions are slowly emerging as I'm driving a lot more compared to before. My D5 (205 hp, twin turbo) seems to like to whistle a lot. At least that is what I would call it.

You can hear it nearly all the time. Boost seems good, no leaks or so, at least at idle. Is that normal?

I mean, a bit of whistle seems normal for a diesel, but I'm not sure if that is too much. My former experiences with turbos were/are a 1.4l Multiair from Fiat as well as a 1.0l Firefly, also from Fiat. Both petrol and both barely whistled...

Cheers

Damien

Kev0607 · Apr 2nd, 2024, 13:55

A slight hiss would be normal. If its excessive like gushing air, that's not. A very common issue that can cause a hissing sound is the turbo resonator seals. Underneath the car, there's a pipe that goes to the turbo and the seals can let air pass, as the seal perishes with age.

A clip of the sound it makes might be helpful. Granted, that won't be easy, but its hard to say without listening to it.

Daim · Apr 2nd, 2024, 16:08

A clip would be really hard to make, as I can't pick up the noise... I was considering replacing all the intake piping, as it is all now 14 years old, so it is worth doing - even though the whistle noise is nice

Lancee · Apr 2nd, 2024, 17:22

Maybe a smoke test might highlight any possible air leak/s ?

Kev0607 · Apr 2nd, 2024, 19:19

Quote:

Originally Posted by Lancee

Maybe a smoke test might highlight any possible air leak/s ?

+1 - Would be a good start.

Daim · Apr 2nd, 2024, 20:17

Quote:

Originally Posted by Lancee

Maybe a smoke test might highlight any possible air leak/s ?

I unfortunatley don't have the tool to do that. But I could possibly just pressurise the system... That might just do the job too...

Apr 2nd, 2024, 11:02	#1
Daim Brit in Germany Last Online: Today 20:30 Join Date: Jan 2011 Location: Bremen	D5 Turbo Whistle... Hey guys, A few questions are slowly emerging as I'm driving a lot more compared to before. My D5 (205 hp, twin turbo) seems to like to whistle a lot. At least that is what I would call it. You can hear it nearly all the time. Boost seems good, no leaks or so, at least at idle. Is that normal? I mean, a bit of whistle seems normal for a diesel, but I'm not sure if that is too much. My former experiences with turbos were/are a 1.4l Multiair from Fiat as well as a 1.0l Firefly, also from Fiat. Both petrol and both barely whistled... Cheers Damien __________________ The Best Nation Is Imagination 2010 V70 (Type 135) D5 (D5244T10) Automatic (TF-80SC)

Apr 2nd, 2024, 13:55	#2
Kev0607 Premier Member Last Online: Today 19:56 Join Date: Apr 2019 Location: Manchester	A slight hiss would be normal. If its excessive like gushing air, that's not. A very common issue that can cause a hissing sound is the turbo resonator seals. Underneath the car, there's a pipe that goes to the turbo and the seals can let air pass, as the seal perishes with age. A clip of the sound it makes might be helpful. Granted, that won't be easy, but its hard to say without listening to it. __________________ 2007 S80 2.4 D5 - 110,000 miles

Apr 2nd, 2024, 16:08	#3
Daim Brit in Germany Last Online: Today 20:30 Join Date: Jan 2011 Location: Bremen	A clip would be really hard to make, as I can't pick up the noise... I was considering replacing all the intake piping, as it is all now 14 years old, so it is worth doing - even though the whistle noise is nice __________________ The Best Nation Is Imagination 2010 V70 (Type 135) D5 (D5244T10) Automatic (TF-80SC)

Apr 2nd, 2024, 17:22	#4
Lancee Premier Member Last Online: Today 20:37 Join Date: Jun 2009 Location: Devon	Maybe a smoke test might highlight any possible air leak/s ?

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