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Crankshaft Pully MADNESS!! 87 EA82T


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So i'm out at the pick a part, thinking my 87 GL-10's EA82T Crankshaft pully is broken... because it freespins on itself.... like a wierd dampner thingie inbetween....

 

so i see an 88 EA82T .....

 

*dont quote me on the exact years, but they were all within a year or two of mine*

 

......and i pull the pully off...and its a single piece... half as heavy as mine... but a single piece.

 

"huh" i think to myself....thats wierd... so i go and pull another off... this time off of an 86 EA82 NA, and the pully is the same as the EA82T. single piece. a third is pulled off of an EA82 NA, and a third to add to the pile...

 

...so i'm about to go and say SCREW IT! i'm putting one of these on, its half the weight!! then i see a new car to the yard... an 87...GL-10, EA82T with!!! 3rd gen heads on it!!! WOAH!!!

 

....and wouldnt you know it....there she be... my crazy pully..... i yank it.. then i see IT TOO SPINS FREELY ON ITSELF. the whole reason i went to the yard... but! then i see the 3rd gen heads...and thats a whole other post ;) i buy like 3 pullys...and leave it up to the USMB to decide which goes on...

 

SO WHATS UP?!?!? can i ditch the heavy-rump roast pully and put the lighter one on.. and get some HP!?! *oh baby* or is there something i'm missing that the wise and all powerful USMB can enlighten this small soul as to WTF is goin on!!

 

and why did the other EA82T have the lighter pully on it? i dont understand the reason for freespinning like it does... (and when i say freespining, i mean like..theres resistance and stuff but i hold onto the center...and the outside will spin, with the center stationary)

 

fill me in!!!! :) thanks!!!

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The haeavier EA82T pulley has a rubber dampener bult into it. I found mine had no locator pin and the woodruff key was a piece of crap. My remedy was to replace it with a pulley from an 87 carb ea82. You are correct in thinking it weighs only half as much.. would have to dig out the numbers, but it was nearly exactly half. Plus, the carb pulley had a locator pinto keep it centered and to stop it from free spinning..

 

No problems yet. I say any weight you ca remove from the crank is a good thing.

 

 

and why did the other EA82T have the lighter pully on it? i dont understand the reason for freespinning like it does... (and when i say freespining, i mean like..theres resistance and stuff but i hold onto the center...and the outside will spin, with the center stationary)

 

 

I would imagine the free spinning on the outer edge is from the rubber dampener wearing out.. never had it happen on an EA82T, but have had it happen more times than I can count on my turbo volvos

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I would imagine the free spinning on the outer edge is from the rubber dampener wearing out.. never had it happen on an EA82T, but have had it happen more times than I can count on my turbo volvos

 

how interesting.... because both EA82T's had the same resistance on the pully..., and i did see one other pully that had no pin hole in it.... the back to the dampner pully, i was thinking maybe because of the turbo, there needed to be extra...dampning...or something.... but then i saw the other turbo car in the yard without any dampner, just straight metal....

 

....*learns* thanks for the info Calebz!!

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Another tidbit. The XT6 has the same dampner pulley. I had one go out on my first XT6 and had a heck of a time finding another. But, at one time, I had a XT turbo in my possesion.

It just so happened to have the solid pulley. BUT the belts are different on the XT6, just one big wide belt compared to the 2 on the XT. So a belt change is needed when using a XT pulley on the XT6.

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I've had more then one on my xt6 fall apart on me... the rubber ring seperates. Right now I have a proecm pulley on it which is one piece and instead of 10 LBs 6 oz like the stock pulley... its 6 ozs!... The only benefit of the rubber ring that I can see is a damper effect for the main bearings from like the A/C switching on and off things like that. Probably the reason you dont see them on all the cars is probably what accessories it has... like A/C.. ALL xt-6s have A/C... ALL Xt-6s have the rubber dampner...

Just a theory:drunk:

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Another tidbit. The XT6 has the same dampner pulley. I had one go out on my first XT6 and had a heck of a time finding another. But, at one time, I had a XT turbo in my possesion.

It just so happened to have the solid pulley. BUT the belts are different on the XT6, just one big wide belt compared to the 2 on the XT. So a belt change is needed when using a XT pulley on the XT6.

 

i measured the thickness-ess on all three pullys *heavy a$$ one... solid with pin hole, and without pin hole* and they seemed to all be the same.... i'll check it out again, good to know. Thanks Turbone!

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I've had more then one on my xt6 fall apart on me... the rubber ring seperates. Right now I have a proecm pulley on it which is one piece and instead of 10 LBs 6 oz like the stock pulley... its 6 ozs!... The only benefit of the rubber ring that I can see is a damper effect for the main bearings from like the A/C switching on and off things like that. Probably the reason you dont see them on all the cars is probably what accessories it has... like A/C.. ALL xt-6s have A/C... ALL Xt-6s have the rubber dampner...

Just a theory:drunk:

 

very helpful. This is all making sense. I think the lighter pully will be mine BWAHAHA :) thanks man!

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