The on the only way that the turbo spoils is due to lack of oil if, the light turned on it is because you had nothing or very little, if this is the case then the mechanics have nothing to do with the breakdown of the turbo, in addition if your vehicle is not equipped with a turvo Taimer it was only a time of time for it to spoil, the Turvo Jira to many rpm many more than the engine and its structure is very delicate Agripan or cut, it has nothing to do with a mechanic to change your carter and spoil it, there are many visions on this subject, that they changed it for another and things like that, I do not think it is a problem of the mechanic or for a bad morning, it was only bad luck and nothing more, now you can walk without turbo, but you will That is likely that as it is assumed that smoke is oil in the exhaust only verifies that the main escape and that is what they have to be checked.