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

Pro mags

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Old Mar 10, 2009 | 10:34 AM
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Red96Lt1's Avatar
Red96Lt1
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From: Birmingham, Al
Pro mags
I just bought some pro mags used. They came with no instructions. I know how to adjust for valve lash, ect. What is the allan screw for on top of the poly locks? Thanks!
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Old Mar 10, 2009 | 10:53 AM
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http://www.jegs.com/i/Proform/778/66913K/10002/-1

It's the lock. You use the hex wrench to ajust the nut and the T-Allen wrench to lock down the allen screw.
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Old Mar 10, 2009 | 12:02 PM
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Also get them tight, but dont go schwarzenegger on them. I have heard of over torquing and cracking the actual poly lock housing itself.
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Old Mar 10, 2009 | 12:34 PM
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Red96Lt1
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So once the valve lash is set, you just screw the allan screw down and it locks your adjustment. Does it just screw down and hit the top of the stud?
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Old Mar 10, 2009 | 12:42 PM
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Stl94LT1
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Yes, it screws down and hits the stud. I then give the polylock a slight turn just to lock it in.
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Old Mar 10, 2009 | 12:45 PM
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Red96Lt1
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cool, thanks guys
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Old Mar 10, 2009 | 01:02 PM
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wrd1972
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From: Kantuckee Yo'
I torque my locks to 25#.
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