I have had a turbo on this car for over a year now and I know what normal turbo noise is (its the sound you here just befor the tyres start smokin he he).
If you have ever heard a turbo scream you can clearly hear that somethings wrong, it sounds like i have a set of cam gear drives and 3 x 6:7:1 blowers under the hood its that loud that you cant hear my stereo at full bore when its trying to get on boost (everyone within 200m of the car looks as soon as they here it, it is sooooooooo loud people even look in the air to see if a plane is falling out of the sky lol ) . It is caused by the exhaust wheel hiting the exhaust housing.

The bearing wear is not always evident in a turbo that has been lying around for a while because they tend to dry out and tighten up abit, when i purchased the turbo there was hardly any axial play and no front to back play and definatly no fin dammage but now she is all freed up and full of oil the play is very evident.

The RB20 and RB25 turbos are non rebuildable units hey have to basicaly highflow it (put bigger wheels in) and modify the internals (bearings and cartridge)... Wish I had never got one now but im kind of stuck with it because everythings just been made to fit it... I should have listened to kegs and converted and got my manifold modified to fit a t28 or t25 but impatient me wanted somethin then and there that would bolt on to a t3 flange.....stupid stupid me oh well I learnt my lesson the expensive way I hope others learn from my expensive mistakes thats why im posting this.

I rang every person in the phone book they all said the same thing except the price was different GCG were the most expensive at $2100, garrett didnt want to know about it,
precision turbochargers at wetheril park were my pick at $1000- $1600 and most others talked a load of crap and tried to sell me a seccond hand piece of scrap metal like the one I already own.

What turbo repairers is everyone else using??