Hi
Recently had a new rev G dv, pcv and cam follower fitted to my k03 GTI and the car now performs nicely. The rev C dv that came off was split, unsurprisingly.
I've just noticed over the last couple of days that when on full/moderate throttle I can hear a high pitched whistle, very briefly, around 2000-2500rpm.
Now it's not a turbo whistle 'sss' sound, or an induction hiss, more like a whistle that you'd make yourself, there's an actual note to it. It sounds similar to that odd resonance you get with some intakes on the k03 engine. Yet I'm completely standard.
I'm wondering if there's a tiny boost leak somewhere. I'd imagine that before the new dv was fitted, the rest of the pipework wouldn't have seen enough boost to cause this, which explains why I'm only hearing it now!
So what are the other weak points with the k03 engine? Intercooler pipework?