So pretty much confirmed its the wastegate thats rattling ive got the option to get the turbo replaced how long will the new oem turbo last until the rattle returns?

On a modern turbocharged engine with a vacuum controlled wastegate like the 1.0 EcoBoost a bit of wastegate rattle is completely normal.

The wastegate mechanism has a little bit of intentional play between the valve plate and the shaft assembly. This allows the valve plate to close properly. This intentional play also allows the valve plate to vibrate/rattle when the valve is not fully closed. Modern turbocharged engines like the 1.0 EcoBoost have a vacuum controlled wastegate system. The valve is normally open and controlled by the PCM. In other words: The PCM determines completely when the wastegate is open or closed. By continuously regulating the amount of vacuum the PCM is also able to partially close the wastegate.

It is a fact that some turbochargers seem to suffer more from wastegate rattle than others. I suspect that this is caused by 2 different things:

1: The actual amount of play between the shaft and the valve plate.
2: How far the PCM opens the wastegate. Opening the valve just a little bit, allows the valve plate to rattle against the seat.


Replacement of the turbocharger can solve (or more likely reduce) the problem but is not guaranteed at all. Wastegate rattle is annoying but since a bit of play between the shaft and the valve plate is intentional, from a technical perspective it is not a problem. Wastegate rattle on these engines is discussed quite often on multiple forums, but I have never seen or heard of turbochargers being replaced just because of the rattle.


I suggest taking the car to a turbocharger specialist and asking their opinion. A turbocharger specialist may be able to replace the wastegate mechanism for a lot less money than a new turbocharger.

7 minutes ago, JW1982 said:

On a modern turbocharged engine with a vacuum controlled wastegate like the 1.0 EcoBoost a bit of wastegate rattle is completely normal.

The wastegate mechanism has a little bit of intentional play between the valve plate and the shaft assembly. This allows the valve plate to close properly. This intentional play also allows the valve plate to vibrate/rattle when the valve is not fully closed. Modern turbocharged engines like the 1.0 EcoBoost have a vacuum controlled wastegate system. The valve is normally open and controlled by the PCM. In other words: The PCM determines completely when the wastegate is open or closed. By continuously regulating the amount of vacuum the PCM is also able to partially close the wastegate.

It is a fact that some turbochargers seem to suffer more from wastegate rattle than others. I suspect that this is caused by 2 different things:

1: The actual amount of play between the shaft and the valve plate.
2: How far the PCM opens the wastegate. Opening the valve just a little bit, allows the valve plate to rattle against the seat.


Replacement of the turbocharger can solve (or more likely reduce) the problem but is not guaranteed at all. Wastegate rattle is annoying but since a bit of play between the shaft and the valve plate is intentional, from a technical perspective it is not a problem. Wastegate rattle on these engines is discussed quite often on multiple forums, but I have never seen or heard of turbochargers being replaced just because of the rattle.


I suggest taking the car to a turbocharger specialist and asking their opinion. A turbocharger specialist may be able to replace the wastegate mechanism for a lot less money than a new turbocharger.

Cheers mate ive drove 2 other st lines and both didnt have the rattle like mine has