LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

I got the hub pulled off about 1/2"... how can I rotate the crank now to get...

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Old Mar 9, 2004 | 11:08 PM
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I got the hub pulled off about 1/2"... how can I rotate the crank now to get...

the mark back to 12:00 ?

Will the hub rotate on the shaft it I try to turn it?


Or should I not worry about the position of the hub when I pull it off?
Old Mar 9, 2004 | 11:10 PM
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Thread the crank bolt all the way in, and use it to turn the crank with a socket/long wrench or breaker bar
Old Mar 9, 2004 | 11:13 PM
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Theres no need to worry about the position of the hub when you pull it off. What are you trying to do??
Old Mar 9, 2004 | 11:24 PM
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Originally posted by S.J.S.
Theres no need to worry about the position of the hub when you pull it off. What are you trying to do??
Ok, so just pull the hub off? Should I still mark it so I can put it back on in the same position though? I am pulling the hub to get the timing cover off to continue my cam swap
Old Mar 9, 2004 | 11:30 PM
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dude, the 93's I believe have a keyed hub, which means it can only go on one way. If not, you'll be able to see in the hub a light line where the key should be (like mine). Either way you'll be fine. Let me know.
Old Mar 9, 2004 | 11:42 PM
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Sounds good! Thanks for the help
Old Mar 9, 2004 | 11:48 PM
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no problemo....
Old Mar 9, 2004 | 11:48 PM
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93's don't have a keyed hub. The hub can go back on any position. It's they way they are balanced, internally in front and external in back, or vise versa. If it was nessacary for it to go back on the exact same place, GM would have keyed the crank like they did in the SBC gen 1 motors.
Old Mar 10, 2004 | 12:27 AM
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ha, i just did that today, you can take the hub off like he said and use the bolt to turn the crank, just thread it all the way in and keep tightening with the rathcet/socket and it will spin .
Old Mar 10, 2004 | 01:05 AM
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Be careful, I stripped my crank snout doing that.
Old Mar 10, 2004 | 07:10 AM
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Originally posted by Jason Dove
Be careful, I stripped my crank snout doing that.
Yeah me too, I did it at work. oh my boss wasn't proud of me that day.
Old Mar 10, 2004 | 07:21 AM
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Originally posted by sc93
Ok, so just pull the hub off? Should I still mark it so I can put it back on in the same position though? I am pulling the hub to get the timing cover off to continue my cam swap
You don't need to worry about it at all at this point. The hub has a mark cast into it at the 12 o'clock position. When you do your cam swap you will be lining up the crank at the 12 o'clock position also. So, everything will be just the way you want it when you go to put it back together.
Old Mar 10, 2004 | 07:23 AM
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Originally posted by shoebox
You don't need to worry about it at all at this point. The hub has a mark cast into it at the 12 o'clock position. When you do your cam swap you will be lining up the crank at the 12 o'clock position also. So, everything will be just the way you want it when you go to put it back together.
Shoebox, does this make a difference? Is there something I don't know about? Which is entirely possible.

Jason
Old Mar 10, 2004 | 07:38 AM
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Originally posted by LilJayV10
Shoebox, does this make a difference? Is there something I don't know about? Which is entirely possible.

Jason
If you are referring to hub position, it's not supposed to unless your pulley has some weights in the holes. IMO, it's just a good idea to index it if for no other reason than to use it as a TDC indicator for adjusting the valves. It is not really any harder to line it up than just to throw it on, so why not do it?
Old Mar 10, 2004 | 09:20 AM
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Originally posted by shoebox
You don't need to worry about it at all at this point. The hub has a mark cast into it at the 12 o'clock position. When you do your cam swap you will be lining up the crank at the 12 o'clock position also. So, everything will be just the way you want it when you go to put it back together.

Thank you sir! You are always such a big help. I appreciate it, as well as your entire website



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