Sick Tdi

[golfmark5]

hi

this morning when i arrivied at work i noticed a whistle coming from the engine bay of my 2.0 tdi the whistle only makes itself herd when i switch the engine off.

there is no warning lights showing on the dash, no loss of power, no problems when driving, or when engine is ticking over.

vw dealer said it is normal but i drive a lot of tdi,s in work and have never heard it on any other tdi.
has anyone else had this problem, how can i solve it.

ps the whistle only lasts for a second.

thanks all.

[golfmark5]

vag tec says it maybe tank ventalation system getting looked at tommorow