weird noise at 4000k in 4 gear 50 mph 1.8 20 v turbo

[chris_20vt]

hiya guys driving home 2nite was giving it some beans a bit i know i shoudnt .
the cars a 2000 on a x plate, done 77k full service history, but the past week or so ive noticed the noise just wondering if u guys could throw some light as to wot it might be b4 i take it into psi tuning. is got a full turbo back supersprint zorst and a dynatwist induction kit also a forge reserc valve. it sound different to the sound of the dump valve tho

 

[kupraking]

I would take it in asap as mine sounded like a diesl 1 day and it happened to be a tensioner bolt which was hanging on by a thread, it then completley snaped about 800 yrd from the garage and set me bk 1k

 

[chris_20vt]

hiya guys just had it checked and they reckon the turbo is gone psi say the turbo is catching on the housing. does anyone know wot turbo goes on my car?

 

[GlanzaV]

Does your car smoke on boost?

 

[chris_20vt]

no m8 no smoke! i thought thats wot a turbo does when they go.

 

[kupraking]

ouch :-( if you have the 150hp its the ko3 turbo, 18hp is the ko3s and if you have the cupra R wich is 225hp ten its the ko4 turb

 

[kupraking]

180 soz

 

[chris_20vt]

thanx for ur advice. i got a price for a turbo at 600 quid but thats got different thrust bearing and something do with the oil. seat want 1750. psi want 780 but thats for a recon turbo. does anyone know of anyone else to go?

 

[kupraking]

Unfortunatley not mate but I have always had a thought in the back of my mind that if mine did go then I would call up Jabba sport and get their garrett turbo, not cheap but prob more reliable than OEM plus it can make the car alot faster when set up correctly, if the 600 quid turbo you saw isn't a brand name or an OEM part from VAG I would avoid it if I were you

 

[GlanzaV]

I don't understand what they mean by

"the turbo is catching on the housing"

If by that they mean the compressor blades are fouling on the housing then that implies that the shaft isn't balanced which in turn implies that the bearing is shot, which would mean that the seals etc would be shot which should exhibit itself by loads of blue smoke on boost??

 

[kupraking]

I don't understand what they mean by

"the turbo is catching on the housing"

If by that they mean the compressor blades are fouling on the housing then that implies that the shaft isn't balanced which in turn implies that the bearing is shot, which would mean that the seals etc would be shot which should exhibit itself by loads of blue smoke on boost??

I agree, also your thread starts by saying at 4000 rpm at 50mph. I would imagine that if it were rubbing on the housing that as soon as the turbo starts to spool the noise should be heard but to be honest i'm no turbo expert so it's just a guess, is it 4000rpm every gear ?