Is this alternator clutch pulley bad or is the alternator shaft bent?

https://www.youtube.com/watch?v=XWtcR9ko_kE&feature=youtu.be
2006 Jetta TDI. I hear an annoying squealling or chirping noise when accellerating. At steady speeds the noise comes and goes for a few seconds and with no set pattern. Sometimes when the noise changes, the engine feels like it has more power, similar to when the load of the a/c compressor is turned off. Removed the serpentine belt, revved the engine and the noise was gone. The serpentine tensioner pulley bearing was loose so I replaced the pulley thinking that was the problem but that didn't stop it. Next in line is the alternator or it's clutch pulley in the video. Is the wobbling pulley causing the noise or should I replace it anyway for the wobble? Or is it wobbling because the alternator shaft is bent and I should replace the alternator?

"This video is unavailable."

And now? Didn't hit, publish before.

Video works. Jam a screwdriver in there and see if it’s clutch pulley still works, where it will only spin one way. If the pulley works, just replace the whole thing. So far I’m pleased with the one I got from metal man. Though I am more contented than most to simply swap parts and think of all the money and time saved

$10 on bent shaft. I had a clutch go out on my Chevy and my dads Buick. They do not rotate that smoothly when they go bad.
either way that SOB is a belt eater!
Go OEM

Seems like a bent shaft but also my understanding is that the pulley should not be free to spin in both directions. The clutched pulley should only allow it to spin in the direction of the serpentine belt rotation and not the opposite way as to not allow the alternator to spin reverse when you shut the motor down and the engine turns backwards a little from the compression bounce.

Giberish33 said:

Seems like a bent shaft but also my understanding is that the pulley should not be free to spin in both directions. The clutched pulley should only allow it to spin in the direction of the serpentine belt rotation and not the opposite way as to not allow the alternator to spin reverse when you shut the motor down and the engine turns backwards a little from the compression bounce.

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The pulley should spin in both directions but the internal will only spin one way due to the clutch slipping and doing its job, otherwise the belt would wear when the engine is shut down and a bit of a back chirp like you said happens.
This is my understanding

Yes, spinning the pulley the direction you did the pulley should slip. If the pulley is locked solid the tensioner will jump around and you will have noise. I would replace the alternator including a new pulley.

Alternator works fine. Ordered a new pulley as well as this tool kit to replace it with. https://www.ebay.com/itm/24pc-Alter...2:g:uh8AAOSw5UZY-Q8m:rk:1:pf:1&frcectupt=true

Grinding noise from alternator is ok, I've bought brand new and it was making that noise and I've had the same wobble on shaft. Remove the alternator, remove pulley (specific tool required £8 eBay) and impact gun. And check for wobble on shaft without pulley. If you don't have time new alternator. Take your old to the shop some give you 100-200 off if you bring old alternator. What country are you at?

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Washington DC is in the US of A.

Oh, your not far from me and my shop. If you wanted, you could bring it up my way in Frederick and work on it? not sure if its driveable. If you have a garage or a shop and your tools, id be happy to hop down and lend you a hand for a few beers!

atikovi said:

Alternator works fine. Ordered a new pulley as well as this tool kit to replace it with. https://www.ebay.com/itm/24pc-Alter...2:g:uh8AAOSw5UZY-Q8m:rk:1:pf:1&frcectupt=true

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When you get the pulley off you will be able to check the alternator output shaft.

Mongler98 said:

Oh, your not far from me and my shop. If you wanted, you could bring it up my way in Frederick and work on it? not sure if its driveable. If you have a garage or a shop and your tools, id be happy to hop down and lend you a hand for a few beers!

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Thanks, if I get stuck I'll look you up.

Pulley replaced and no wobble.

Excellent! Thanks for posting solution.

Great news. I have no idea how an alternator could develop a bent shaft.

No lower engine cover. I woulda guessed OPs was bent, nice that it wasn't. Some piece of junk flying off a truck in high speed urban traffic, you may not even notice.