I've been diagnosing an exhaust leak, and this is where I saw soapy water bubbling (I had a blower pushing air into exhaust tip).
There shouldn't be any leaks from there, right? I want to make sure this before committing on buying a replacement turbine

The turbo is BW 8374

 

that looks like where the rod passes through for the wastegate. definitely an issue there. i would say pull it and inspect it before buying anything

 

it’s only a bushing so naturally it will leak some in order to have the necessary clearance for the shaft within it to rotate, but that clearance will most likely be much greater when cold than when at operating temperature.
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That bushing is designed to seal with exhaust heat.

 

What issue were you trying to diagnose?

 

I agree
I smoke tested my brand new bw efr IWG and it smoked out that bushing as well

 

Thanks everyone for your answers. I will assume that bubbling is normal.

Lately, I hear a strange noise (not loud, just barely) which resembles an exhaust leak (or at least it seems so to my ears).
I was trying to locate that "leak".

 

What is your boost control strategy?

Just heard a Honda this weekend racing that kind of sounded like an exhaust leak on one cylinder once the turbo spooled, but it was just the boost controller mac valve duty cycle pulsing causing the wastegate to flutter.