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crank pulley question

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Old Jun 21, 2007 | 11:58 AM
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Default crank pulley question

ok, the crank pulley has a ever so slight wobble to it. It barely moves off center. You really have to examine it to tell. Could i have problems?
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Old Jun 21, 2007 | 12:01 PM
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Stock pulley? If so, how many miles on it?
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Old Jun 21, 2007 | 12:04 PM
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Originally Posted by vettenuts
Stock pulley? If so, how many miles on it?
stock. 35k. but just put it back on
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Old Jun 21, 2007 | 12:11 PM
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Mine had a SLIGHT wobble, so I replaced it with brand new GM replacement. New one had slight wobble also...
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Old Jun 21, 2007 | 12:13 PM
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Originally Posted by FRCTony
Mine had a SLIGHT wobble, so I replaced it with brand new GM replacement. New one had slight wobble also...
and all is good? you drive it hard?
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Old Jun 21, 2007 | 12:18 PM
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I would just keep an eye on it for now, if you can get your fingers in there put a white stripe on the bolt head and the pulley so you can also watch for any loosening. The other thing to look at if you can see it is any deterioration of the rubber element. Kind of hard to get your head in there though, at least I can't get my fat head in there
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Old Jun 21, 2007 | 12:24 PM
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Originally Posted by 02gt350
and all is good? you drive it hard?
So far

I'm running 10psi Procharger with 4.10 rear and I don't baby it.

Good advice to mark the bolt, but if the damper is seperating, it won't matter. This is not the same as the bolt backing off. When that happens the entire balancer walks off the crank.

You should have plenty of warning that the outer pulley has slipped (Noisy belt, belt jumping off).

The only reason I replaced mine is because I had to pin the crank anyway.
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Old Jun 21, 2007 | 01:00 PM
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Originally Posted by vettenuts
I would just keep an eye on it for now, if you can get your fingers in there put a white stripe on the bolt head and the pulley so you can also watch for any loosening. The other thing to look at if you can see it is any deterioration of the rubber element. Kind of hard to get your head in there though, at least I can't get my fat head in there
is the rubber part in teh ceter? how would I see that? I will do teh stripe, good idea.

My main concern was, I just had to tear it all aprt cuz it was leaking from somewhere around there, maybe front seal, not sure. So im wondering if the wobbleing tore up the front seal and made a leak
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Old Jun 21, 2007 | 01:07 PM
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Possibly, but since the wobbling would be off the main hub of the damper I would think it would have to be wobbling really bad to affect the seal. When it starts getting bad, you will notice. But there have been cases with the stock bolt where a re-installed balancer will come off the shaft that's why I said to mark it and keep an eye on it.
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Old Jun 21, 2007 | 01:25 PM
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Originally Posted by vettenuts
Possibly, but since the wobbling would be off the main hub of the damper I would think it would have to be wobbling really bad to affect the seal. When it starts getting bad, you will notice. But there have been cases with the stock bolt where a re-installed balancer will come off the shaft that's why I said to mark it and keep an eye on it.
thanks bud, your quite the pulley master
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Old Jun 21, 2007 | 01:38 PM
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do a search. I remember the same post about a year ago.. A lot of guys were using and recommending an aftermarket pulley.. Can't remember what the name was... This is a common problem on our cars and apparently the factory pulley is just a piece of s***..
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Old Jun 21, 2007 | 04:55 PM
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mine wobbled and had it replaced with a fluidampner best thing I could have done it runs much smoother and I done have to worry about it coming apart on me .If your going to change it do it right stock ones will come apart sooner or later
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Old Jun 21, 2007 | 11:12 PM
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Replaced mine at 45k miles for an underdrive pulley. Had a slight wobble and belt squeek.
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Old Jun 22, 2007 | 12:08 AM
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if the wobble is larger than +/-.25" at the max wobble it may need replacing. Mine has been wobbling ever since i've owned it, no problems.
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Old Jun 22, 2007 | 08:18 AM
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Originally Posted by TheRadioFlyer
" Mine has been wobbling ever since i've owned it, no problems.
Same here.....more than 1 tech has said it's "normal"
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