Squeaking at idle. Bad turbo? Pic
08-04-2012, 02:33 AM
#1
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Squeaking at idle. Bad turbo? Pic
So I developed this squeak @ idle @ around 1k rpm. Went through diagnostics and came to the conclusion that sound is coming from my turbo. Removed intake tube and felt for shaft play. Not really sure on the allowed tolerances but this thing had a slight click in it, in the up and down motion. In the pic it looks like there is a shiny spot on the upper right side of turbo where compressor wheel may be touching. Is this enough to convince you of a bad turbo?
http://www.youtube.com/watch?v=5CUAl...e_gdata_player
http://www.youtube.com/watch?v=5CUAl...e_gdata_player
Last edited by LNFwagonSS; 08-04-2012 at 11:52 PM. Reason: Add vid
08-04-2012, 02:45 AM
#2
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if you want to measure the tolerances you will need a bench vice and a metric dial gauge with an articulated extension attached to a magnetic support. Take the turbo, secure it via housing or flange in the vice, attach dial gauge device somewhere on the vice, and put the tip of the needle onto the compressor or turbine wheel edge. Now turn the shaft. If the is more than 0.05mm play while the shaft is turning sitting on the bearing the shaft is bent.
If shaft is straight, wiggel the rotor side to side not rotating so you can get a reading on the play between bearing and shaft(radial endplay). more than 0.05mm there is something funny with your bearings or the diameter of the shaft.
personally with the rubbing, I'm inclinded to think that it's a bent shaft. I can't judge based on the photos but if the wear is really bad and it's really digging into that housing.. think where the shavings would be going...
If shaft is straight, wiggel the rotor side to side not rotating so you can get a reading on the play between bearing and shaft(radial endplay). more than 0.05mm there is something funny with your bearings or the diameter of the shaft.
personally with the rubbing, I'm inclinded to think that it's a bent shaft. I can't judge based on the photos but if the wear is really bad and it's really digging into that housing.. think where the shavings would be going...
Last edited by tuner923; 08-04-2012 at 03:00 AM.
08-04-2012, 03:19 AM
#3
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I have noticed a small # of tiny shavings that can only be seen in brighter light inside intake tube. The squeaking just started less than week ago. I think it's faulty bearings. There is definatly more than .05Mm play there. Only squeaks when compressor becomes heat soaked.
08-04-2012, 03:58 AM
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I don't find our turbos to be the most reliable. Mine makes a clicking sound if i spool before reaching operating temp. a buddy of mine, his would ring like a tuning fork when spooling. but if your rubbed area is in one spot and not completely around it's a ever so slight bend in the shaft.
08-04-2012, 04:54 AM
#7
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I have heard of this as well so I installed new coupler from turbo to upper cp and then did boost leak test with soapy water. Did not find a single leak. Will see if whining goes away with new turbo.
08-06-2012, 03:20 PM
#14
what the hell? I've never done that and I haven't screwed my turbo up.
08-06-2012, 03:47 PM
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08-06-2012, 10:32 PM
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Thats a bullshit statement buddy. So you mean to tell me that every time I go start my car after it sits for awhile, I have to prime my turbo?? Just because you do an oil change, doesnt mean that you're draining all the oil out of the turbo. All you're doing is draining the oil out of the pan. Ive owned countless turbo cars and I never prime the turbo after an oil change. The only time you would need to prime a turbo is if it is brand new and never ran before. And to do this you would start the car while holding the compressor housing nut with your fingers so the turbo doesnt spin, being careful not to lose a finger. Disabling the ignition would just make your car not start. You will still get a little compression causing the turbo to spin when it exits through the exhaust. Tell your teacher he is dumb, cause I never heard of priming a turbo after every oil change.
08-06-2012, 10:38 PM
#18
Thats a bullshit statement buddy. So you mean to tell me that every time I go start my car after it sits for awhile, I have to prime my turbo?? Just because you do an oil change, doesnt mean that you're draining all the oil out of the turbo. All you're doing is draining the oil out of the pan. Ive owned countless turbo cars and I never prime the turbo after an oil change. The only time you would need to prime a turbo is if it is brand new and never ran before. And to do this you would start the car while holding the compressor housing nut with your fingers so the turbo doesnt spin, being careful not to lose a finger. Disabling the ignition would just make your car not start. You will still get a little compression causing the turbo to spin when it exits through the exhaust. Tell your teacher he is dumb, cause I never heard of priming a turbo after every oil change.
08-06-2012, 10:47 PM
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Thats a bullshit statement buddy. So you mean to tell me that every time I go start my car after it sits for awhile, I have to prime my turbo?? Just because you do an oil change, doesnt mean that you're draining all the oil out of the turbo. All you're doing is draining the oil out of the pan. Ive owned countless turbo cars and I never prime the turbo after an oil change. The only time you would need to prime a turbo is if it is brand new and never ran before. And to do this you would start the car while holding the compressor housing nut with your fingers so the turbo doesnt spin, being careful not to lose a finger. Disabling the ignition would just make your car not start. You will still get a little compression causing the turbo to spin when it exits through the exhaust. Tell your teacher he is dumb, cause I never heard of priming a turbo after every oil change.
08-09-2012, 12:57 AM
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Thats a bullshit statement buddy. So you mean to tell me that every time I go start my car after it sits for awhile, I have to prime my turbo?? Just because you do an oil change, doesnt mean that you're draining all the oil out of the turbo. All you're doing is draining the oil out of the pan. Ive owned countless turbo cars and I never prime the turbo after an oil change. The only time you would need to prime a turbo is if it is brand new and never ran before. And to do this you would start the car while holding the compressor housing nut with your fingers so the turbo doesnt spin, being careful not to lose a finger. Disabling the ignition would just make your car not start. You will still get a little compression causing the turbo to spin when it exits through the exhaust. Tell your teacher he is dumb, cause I never heard of priming a turbo after every oil change.
08-09-2012, 01:16 AM
#23
Thats a bullshit statement buddy. So you mean to tell me that every time I go start my car after it sits for awhile, I have to prime my turbo?? Just because you do an oil change, doesnt mean that you're draining all the oil out of the turbo. All you're doing is draining the oil out of the pan. Ive owned countless turbo cars and I never prime the turbo after an oil change. The only time you would need to prime a turbo is if it is brand new and never ran before. And to do this you would start the car while holding the compressor housing nut with your fingers so the turbo doesnt spin, being careful not to lose a finger. Disabling the ignition would just make your car not start. You will still get a little compression causing the turbo to spin when it exits through the exhaust. Tell your teacher he is dumb, cause I never heard of priming a turbo after every oil change.
08-09-2012, 01:43 AM
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