I had a problem with my turbo , i.e. it was totally dead. Managed to source a turbo off Ebay which has done 20K. It was fitted yesterday....
The turbo is boosting, however when it does there is a squeal for a second and then everything is fine.
The garage say that because they do not have the tech, the waste gate sensor needs to be set up on the turbo and that is what is causing the noise.
Is this true, have they damaged the bearings of fitting it ??