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Definitely sounds like a boost leaking but just finding where. Fingers crossed its an easy fix.

Have checked the orings and clips on the intake side of intercooler and seem OK. It had 415,000km and no loss of power over 2000rpm. Goes great for what it is but the whistle is just annoying. Will...

I've checked the intercooler piping but can't see any holes. Is that what you meant or is it something different?

Hey guys,
Bought my van and has a whistle noise under boost. Not sure if its the turbo or what as it is hard to replicate when not driving. Anyone else had a issue like this. ...

Tone13, is it like this video?
https://youtu.be/0QARXnNDcng

Hi all, I own a 2007 T5 Transporter with over 400k and just looking for some info on mods, updates, fixes, repairs and so on. Goes well for the KM's.