I've had my 1998 Golf GTI 1.8T a few weeks and since owning it I've noticed a slight noise every time I lift off the throttle. It's not a loud dump valve wheeze like you hear on some cars. I can only describe it as a slight whickering sound. I've always assumed that this is normal sound for the turbo to make, but I've got to thinking that maybe it's not. Is this usual?
Russ