L322 Slight whistle
- Thread starter paulpdh
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brianp38dse
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Have a check of the turbo intercooler pipework, splits in the hoses can whistle
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Don't forget the crank case breather upgrade, not for the whistle just cos it's worth doing.
stuu
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Also egr pipe at exhaust manifold join can whistle.
Cracked exhaust manifold can whistle.
Turbos can start whistling before failure.
Exhaust flexi joint may be splitting.
Intercooler pipe work may also be perished. As mentioned above.
Crank case breather must be done as above
Crank case breather upgraded to a vortex style as above is a must as the old loo roll style clogs up.
Cracked exhaust manifold can whistle.
Turbos can start whistling before failure.
Exhaust flexi joint may be splitting.
Intercooler pipe work may also be perished. As mentioned above.
Crank case breather must be done as above
Crank case breather upgraded to a vortex style as above is a must as the old loo roll style clogs up.
Looked at hoses from the intercooler to the turbo, and they are rock hard. They definitely could be the issue. Will remove them and check throughly. Its as soon as you come off the gas, a burst of air or whistle. It last less then a second.
brianp38dse
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Are you sure someone hasn't fitted a turbo dump valve they do that 
Are you sure someone hasn't fitted a turbo dump valve they do that
That's exactly what it sounds like. Soon as you come off the gas. Quick whistle burst.
Are you sure someone hasn't fitted a turbo dump valve they do that
Stupid if it is fitted. Would it be on the intake side of the turbo ?
brianp38dse
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If fitted it would be between turbo and inlet.
stuu
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Mine does that too noticeable after a quick acceleration and quickly off the throttle at 2k it was there after removing the egr system.
Was a tiny bit more noticeable after loading a remap on it.
They're a vvt vairable vane turbo.
Vanes in the exhaust side of the turbo move to control boost pressure.
I think its normal.
Whatever it is its done it for nearly a year,
also of the same age same mods... Egr removed and remapped.
My 320d
My 330d
Pals 320d
A 320 to 330d conversion iv just done (m57 like our td6s)
All make the same 'dump' noise approx 30% load to 2k and quick off the throttle.
Was a tiny bit more noticeable after loading a remap on it.
They're a vvt vairable vane turbo.
Vanes in the exhaust side of the turbo move to control boost pressure.
I think its normal.
Whatever it is its done it for nearly a year,
also of the same age same mods... Egr removed and remapped.
My 320d
My 330d
Pals 320d
A 320 to 330d conversion iv just done (m57 like our td6s)
All make the same 'dump' noise approx 30% load to 2k and quick off the throttle.
Last edited:
Yes thats exactly it around 30 load. I picked it up the weekend and was worried its an issue. M57 td6. Thanks guys much appreciated
stuu
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Follow that vac line up and you'll see the solinoid and vac canister that controls the actuator.
stuu
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Thanks for your help really appreciated
