[mros47]

hi, somebody can tells me something about the bmw E90 320D, because I bought one and everybody told me that the turbo is so delicated and needs some time since I start the car and I drive, and the same thing when Im gone stop the motor I have to stay in ralenti for a few minutes.
Please help me with this info. thanks

[Paul330d]

I don't fully understand your question, but there should be no problem with the 320d's turbo - just drive it!

[Masheen]

Originally Posted by mros47

hi, somebody can tells me something about the bmw E90 320D, because I bought one and everybody told me that the turbo is so delicated and needs some time since I start the car and I drive, and the same thing when Im gone stop the motor I have to stay in ralenti for a few minutes.
Please help me with this info. thanks

Drive it hard

[dtelle]

Originally Posted by mros47

hi, somebody can tells me something about the bmw E90 320D, because I bought one and everybody told me that the turbo is so delicated and needs some time since I start the car and I drive, and the same thing when Im gone stop the motor I have to stay in ralenti for a few minutes.
Please help me with this info. thanks

Rigth i understand what you mean.

It is a general rules with a turbo engine. Since the turbo is a fan rotating at about 120 000 - 150 000 rpm at full charge, all involved mechanical part are under stress, specialy the bearing of the turbine. this one is lubricated by a "wet" bearing that needs oil pressure. If you are driving at full charge with a cold engine, first the oil isn't at optimal temperature and his viscosity to low, such that the lubrication of the bearing is not optimal. Then you will stress the metallic part of the turbine since you are blowing with exhaust gaz at full charge(500-600 °c), obvious the metal is still "cold".


When stopping the engine, it was true in the past and it is allways true:

Never stop your engine until the turbo didn't go to low rpm. As said the lubrication needs oil pressure, if you stop the engine, the oil pressure decrease immediatly, but if your turbo charger is still running at high rpm (because your engine were at higher rpm a few second ago), the turbo is still rotating, until it stopps, without lubrification of his bearing (a turbine rotating at 100 000 rpm is not able to stopp immeditaly because of his inertie)

Of course new turbo have less inertie than 20 years ago, there are ligther and have variable geometry which is able to break the turbine in order to stop faster.

But a turbo will never be a compressor, there is response time to go in and to stop.