RS2 problems

[rs2paul]

Just had my RS2 turbo reconed by ATE, after I blew it up at Castle Coombe.
All was good for the first 350 miles but now at low rpm the unit is very
Chattery & at 3000 to 3700 rpm in every gear they is a low pitched noise/vibration
(sounds like blowing over an empty bottle) & with a constant whine,
Sound like I’m being followed buy an ambulance??
The performance has dropped off, plus I’m getting a pulsing boost?
Do I have boost leak? Or a knackered turbo?
I spoke to ATE, they said check the end float on turbo shaft which I did &
I could not detect any
Any ideas

[rs2paul]

Sorry i ment AET not ATE

[4WheelDrifter]

Boost leak or broken DV?
What caused the turbo to die in the first place?

[Greg_S]

Paul, was yours the Blue RS2 that blew the oil breather pipe off in one of the earlier sessions?

[AAH!]

as mentioned above sounds like a dv problem.

[rs2paul]

my old unit had done 175,000 miles, & all the castle coombe action blew the seals
& when i took if of it was locked solid?

[rs2paul]

Also when i replaced to turbo i replaced the pressure reg valve (DV) & the wastegate diaphram with new parts?

[AAH!]

It is unlikely but it might be worth checking to see if the DV has been fitted the correct way round. And for the cost of a new DV (£20 -ish. IIRC you can use one from a S3) it may be worth changing it just in case.

see here for a previously posted pics:

http://www.s2forum.com/forum/attachment.php?attachmentid=7962&d=1135599198

http://www.s2forum.com/forum/attachment.php?attachmentid=7399&d=1130625022

Your next stop would be to do a pressure test. If ever you are in west/central London I could help you with this.

HTH ... Angus

[rs2paul]

What a w--ker i am.... Angus i have just check the position of DV!! & you guessed it,
wrong way round???
so i will swap round & let you know, thanks for the offer of pressure test..

Paul.

[AAH!]

Hope that solves the problem.

Angus

[rs2paul]

just fitted the DV corectly!!!
It has transformed the car!!!
I thought it was quick before??
Many thanks.

[Doug_RS2]

If changing the diverter round the other way transforms the car (on boost) there is probably a boost leak somewhere.