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XC90 '02–'15 General Forum for the P2-platform XC90 model |
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Boost whistle noise when coldViews : 593 Replies : 2Users Viewing This Thread : |
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Jun 18th, 2021, 13:15 | #1 |
Junior Member
Last Online: Jan 5th, 2024 16:14
Join Date: Nov 2019
Location: Peterborough
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Boost whistle noise when cold
2005 XC90 D5 auto. I have a hissing / whistling turbo boost related noise which I notice with a window down, but only at low speed for the first few miles of a journey. I've been telling myself that its a built in feature to reduce the boost pressure when the engine is cold, but suspect its more likely a leak which seals itself once everything is hot. Is there a common leaky joint? Is there an acknowledged way to find the leak which is only heard when the turbo is boosting? Or is it designed like this?
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Jun 18th, 2021, 19:30 | #2 |
Petrolhead+Lots of Diesel
Last Online: Yesterday 19:05
Join Date: Aug 2008
Location: Glasgow
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Check all the seals/joints for the turbo hoses inc both orange resonator box seals .... a weep of oil is usually the tell take to save dismantling, also check the condition of the intercooler.
Hope it helps.
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BMW X3 Msport MHEV 2020MY & VW Beetle Design 1.2Tsi DSG 2014MY Previous XC90 D5 SELux Geartronic 2009MY |
Jun 18th, 2021, 23:50 | #3 |
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Last Online: Apr 19th, 2023 21:16
Join Date: Jun 2016
Location: Scotland
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Sounds like a boost leak, you will have to check all the hoses from the turbo and intercooler. Very good chance it is the resonator box orange seals that need to be replaced. Fairly straightforward for any garage to do.
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Current V70III 2.4D (163) SE Sport 4C (2008) V70 T5 (1996) V70 P2 D5 EUIII (2002) XC90 V8 4.4 (2007) |
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