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Old 07-25-2012, 05:58 AM   #1
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Adjustable Lower Control Arms - Jam Nut

All four of my adjustable lower control arms have loose jam nuts. I have read they need to be tightened prior to installation -- well, they are loose now. Is there any reason you can see why I should remove them and tighten them vs. attempt it while they are installed? Also, what do you think about using some blue LocTite on them?

Thank you.


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Old 07-25-2012, 06:20 AM   #2
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You don't need to remove the arm to tighten them. Just make sure you have the heim joint centered in the mount and immobile when you tighten the jamnut. This will ensure your heim had equal room to move during articulation.

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Old 07-25-2012, 06:22 AM   #3
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why would you remove them? just crack down as hard as you can with a giant crescent wrench.
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Old 07-25-2012, 07:45 AM   #4
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The JJ's don't need to be immobile. Make sure they are inline/concentric with each other and then crank down the jam nut. That will force both JJ's over to one side equally. Crank until you're red in the face and give it another crank. Now crank back the other way to center the joints again. Done, they should never come loose until you take the wrench to them.
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Old 07-25-2012, 08:13 AM   #5
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Quote:
Originally Posted by TnDz TJ View Post
Just make sure you have the heim joint centered in the mount and immobile when you tighten the jamnut. This will ensure your heim had equal room to move during articulation.
No. OP, don't listen to the above.

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The JJ's don't need to be immobile. Make sure they are inline/concentric with each other and then crank down the jam nut. That will force both JJ's over to one side equally. Crank until you're red in the face and give it another crank. Now crank back the other way to center the joints again. Done, they should never come loose until you take the wrench to them.
This is how you should properly tighten your arms with JJs. If necessary, you can also use some locktite, but if you use enough force like Imped said you shouldn't need to.
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Old 07-25-2012, 11:38 AM   #6
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That what I was trying to convey.. Make sure the joint are centered or inline and held that way while you tighten the jamnuts. Sorry if I caused confusion.
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Old 07-25-2012, 04:15 PM   #7
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Quote:
Originally Posted by Imped View Post
The JJ's don't need to be immobile. Make sure they are inline/concentric with each other and then crank down the jam nut. That will force both JJ's over to one side equally. Crank until you're red in the face and give it another crank. Now crank back the other way to center the joints again. Done, they should never come loose until you take the wrench to them.
I center them then use a screwdriver or something and wedge in between the JJ and mount to hold it centered. Then crank down on the jam nut. Are saying this is incorrect? If so, why?
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Old 07-25-2012, 05:27 PM   #8
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Because it's not needed. You can crank down on that jam nut harder when you're not worried about where the joints are. You'll force them to even out once they bottom out against the mount. What about my explanation aren't you understanding? I'll try to explain it better.
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Old 07-26-2012, 07:49 AM   #9
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Originally Posted by ipleadda2nd View Post
I center them then use a screwdriver or something and wedge in between the JJ and mount to hold it centered. Then crank down on the jam nut. Are saying this is incorrect? If so, why?
Like Imped said, it's easier to get them tighter if you're not worried about centering the joint in the mount. What most don't realize, is that it doesn't matter what the orientation of the joints are in the mount provided that both joints are in the same orientation.

Tightening the jam nut until both joints "bottom out" against the mount ensures that both joints are in the same orientation, and it also allows you to tighten the jam nut as tight as possible. The joints will move as needed, so there is no need to worry about centering them in the mount.
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Old 07-26-2012, 09:04 AM   #10
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Because it's not needed. You can crank down on that jam nut harder when you're not worried about where the joints are. You'll force them to even out once they bottom out against the mount. What about my explanation aren't you understanding? I'll try to explain it better.
So you're talking about CAs that have JJs on both ends I take it? Then no problem. I'm assuming it's like mine, a Clevite bushing on one end and a JJ (TeraFlex nockoff actually) on the other. The Clevite end doesn't twist so I make sure the joint is centered in the mount when I tighten the jam nut.
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Old 07-26-2012, 09:19 AM   #11
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I was making the opposite assumption....if it just has a joint on one end, then yes, you'll need to keep it stationary while tightening the jam nut.

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