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420A Bad Turbo Squeal?

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It could for sure. Best to do a boost leak test and get a spray bottle with soapy water and spray around the couplers and throttle body, biss any place that seems it could leak. You'll find it
 
It could for sure. Best to do a boost leak test and get a spray bottle with soapy water and spray around the couplers and throttle body, biss any place that seems it could leak. You'll find it
It's not a leak as far as the boost leak test went. It's something sounds like a "friction" type noise. Metal rubbing some kind of metal but I'm unsure. I'll unbolt the turbo tomorrow to verify that it isn't it.
 
Did u do a boost leak test? And to how high of psi?
Set the regulator to 20lbs and this thing is making the noise when I'm not evening building positive pressure. I'm going to remove the turbo tomorrow and check to see if the flywheel is hitting the dust shield. That's about all I know to do unless it's something internal
 
I've had similar noises and it was a tear in my bov vac line so basically the bov wasn't closing fast enough and allowing a small amount of air for a second before boost and it would make a kinda wistle.
 
I've had similar noises and it was a tear in my bov vac line so basically the bov wasn't closing fast enough and allowing a small amount of air for a second before boost and it would make a kinda wistle.
Yeah, it sounds like a whistle but it isn't. I took the turbo off, and the sound is gone. So, Ill be looking to buy another t3/t4. Garrett, precision, holset,
 
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