T3 Hybrid Turbo -Rattling Internal Wastegate?

[cygnusx1]

When I rev the car at idle, especially when its warming up, I hear a rattling from the turbo area. At first I thought it was the rotor slightly catching the inside of the housing but the turbo still spools up fine there is no rattle with any load on it. Sometimes I hear the rattle when I am coasting foot off the gas.

 

Tonight I grabbed the wastegate arm with a pair of channellocks and forced the puck over to open the gate. When I rev it up and hold the puck open, the rattling goes away. Is there a possibility of some interference with the puck/arm and the rotor in the turbine? Or could it be just the puck rattling? It could also be that the spooling does not occur when I open the gate, so the turbine doesn't rattle either.

 

Any ideas? Experiments I can try?

[Noddle]

When I rev the car at idle, especially when its warming up, I hear a rattling from the turbo area. At first I thought it was the rotor slightly catching the inside of the housing but the turbo still spools up fine there is no rattle with any load on it. Sometimes I hear the rattle when I am coasting foot off the gas.

 

Tonight I grabbed the wastegate arm with a pair of channellocks and forced the puck over to open the gate. When I rev it up and hold the puck open, the rattling goes away. Is there a possibility of some interference with the puck/arm and the rotor in the turbine? Or could it be just the puck rattling? It could also be that the spooling does not occur when I open the gate, so the turbine doesn't rattle either.

 

Any ideas? Experiments I can try?

 

Some things to check,

 

the actuator arm hole where it fits over the waste gate arm, is the hole sloppy ?, thus allowing it to 'rattle'

 

with the engine off, and the actuator arm disconnected off the wastgate, can you wiggle the waste to see if it has to much slop in the "bush contact area"

 

Nigel