the only way to describe it is it sounds like a balloon being deflated slowly when the opening of it is being pulled tight....or the noise that a reed makes when you blow over it in your hands...i've got a clip of it, but can't post it anywhere.
the garage have had it in for the day but can't replicate it, as predicted, so i've told them to keep it overnight and try it from cold in the morning....i've asked them to keep it until its fixed
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