Car suddenly has started been noisey when on boost. It started the other day when i replaced the Y breather pipe, i noticed the plastic tube was split so taped it up till my replacement arrived. After replacing both tube and the breather its still noisey on boost. Sounds like a drill and sounds like a boost leak but im not loosing any boost, still goes hard :/

Might be worth mentioning my exhaust is blowing somewhere near the front of the car not had chance to get it looked at

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Think you've possibly answered your own question

In which part?

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The noise is the turbo whistling and not exhaust noise

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My Elegence 1.8T sounds the same, ive started driving with the windw down now so i can hear it more. I also took the engine cover of yesterday to notice the prev owner had put masking tape around the split Y breather pipe (Looks like a proper job).

Gonna keep an eye on this thread now though.

I replaced all the pipes that were split but the turbo whistle is more promient. Unless its my exhaust i dont know what it might be

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One of the turbo pipes?

Not loosing boost though?

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Might only be a very small split?

Ive been threw all the boost hoses, vac pipes and cleaned the throttle body today while the pipe was off. No splits. I can only assume the whistling is coming via the blowy exhaust

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This is the exhaust just for future reference to anyone else. Its broken at the flexi part just after the turbo. I wrapped it in exhaust wrap to try it. Was bang on until i gave it full throttle and the wrap blew to bits lol

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