My GT2560 is making a "tic" noise with every revolution. You can only hear it after the engine is off, and I don't know if it continues after the car is warm or not, since it's still on jackstands.
It's not a very loud noise, and it doesn't really sound like a blade is hitting anything, so I can't really figure out what it might be.
Since the last time I have driven the car (I never heard this noise before) I had the turbo off, had both compressor and turbine housing off, and painted them both, then put them back on.
So what might be making this noise, and is it fine, or do I need to take the stupid turbo off or something? I will try to get a video of it, but I can't imagine the sound will show up. I checked the oil supply line and it is full, so the turbo is getting oil I guess.
Applying axial pressure doesn't seem to make any difference, pushing or pulling. I am trying to take the compressor housing off, but I had a rough morning so I took a deep breath and said "---- this noise, I'll try again later".
yeah, I'd take it apart and inspect the housing for signs of abrasion. the only time i've had a turbo make anything remotely resembling that noise was when I had enough shaft play for the impeller to be making contact with the compressor housing.
Well, I took the turbo off, and removed the compressor housing, and it still makes the same noise. It sounds like it's coming from the compressor wheel, but it's really hard to tell. It is really barely audible.
Loose CHRA/turbine bolts, Inco heat shield behind the turbine is making that noise.
I checked that, too. I took off the turbine housing (all the bolts were tight) and it still makes the noise even when I hold that shield. It sort of sounds like the noise is coming from behind the compressor wheel. I have no idea what could be causing it, though. Maybe it is a normal amount of noise, is a turbo supposed to be absolutely silent?