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Old 02-27-2012, 07:21 PM   #1
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Sway bar bolts smaller than bracket holes, why not in F911 upgrade kit?

I've found, after dinking around under the front end, that the swaybar bolts are slightly smaller than the holes they live in. If the nuts are just a wee bit loose, the swaybar linkage bolts will slip up and down as you rock the Jeep. All four points do this, top and bottom. This is pretty apparent on the trail, as it results in a pretty well defined clunk every time one tire moves.

Obviously the bolts could be a hair larger to not allow for this amount of play. So why are they not a hot-ticket upgrade item? Why have they not been identified and added to the bolt upgrade kits we're all buying these days? I know there's not a lot of torque or pressure on these particular bolts, but wouldn't it be worth upping the size just to prevent the clunk?

Then again, the clunk is a good red flag that something's loose, so maybe it's better to leave them be?

As an aside, are the "bolts" on the JKS Swaybar QD kit the same size? If so, it seems that there'd be an almost constant clunking from both the top and bottom. True?

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Old 02-27-2012, 07:26 PM   #2
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sway bar doesnt do anything important. Well, it helps prevent body roll for when youre cornering. At high speeds. In a jeep


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Old 02-27-2012, 10:02 PM   #3
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The sway bar end links are designed to flex with the suspension...thus the stock rubber bushings. Many aftermarket end links have heim joints to give them even more movement. I don't think you would want them to be fixed with no movement which would cause binding.
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Old 02-27-2012, 10:30 PM   #4
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Quote:
Originally Posted by sneck
sway bar doesnt do anything important. Well, it helps prevent body roll for when youre cornering. At high speeds. In a jeep

This ^^

Are you sure it's the links clunking?
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Old 02-27-2012, 10:37 PM   #5
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Yes, the bolts themselves move within the hole in the actual swaybar, as well as inside the axle bracket hole. Grab the bumper and rock the Jeep, you can see the bolt heads sliding up and down against the outboard face of the axle bracket (on the upper end, it's the nut that slides against the inboard face of the swaybar).

I've tried cranking the nuts/bolts down as hard as I can, and this seems to fix the issue for a while, but one good offset speedbump and it starts again. I'm sure it can be fixed permanently by having a shop torque things down more, but the question remains: Shouldn't the bolt shaft diameter more closely match the holes in the swaybar and axle bracket?
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Old 02-27-2012, 10:40 PM   #6
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Quote:
Originally Posted by Mr. Fish
Yes, the bolts themselves move within the hole in the actual swaybar, as well as inside the axle bracket hole. Grab the bumper and rock the Jeep, you can see the bolt heads sliding up and down against the outboard face of the axle bracket (on the upper end, it's the nut that slides against the inboard face of the swaybar).

I've tried cranking the nuts/bolts down as hard as I can, and this seems to fix the issue for a while, but one good offset speedbump and it starts again. I'm sure it can be fixed permanently by having a shop torque things down more, but the question remains: Shouldn't the bolt shaft diameter more closely match the holes in the swaybar and axle bracket?
Buy new bolts?
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Old 02-27-2012, 10:41 PM   #7
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Quote:
Originally Posted by Mr. Fish
Yes, the bolts themselves move within the hole in the actual swaybar, as well as inside the axle bracket hole. Grab the bumper and rock the Jeep, you can see the bolt heads sliding up and down against the outboard face of the axle bracket (on the upper end, it's the nut that slides against the inboard face of the swaybar).

I've tried cranking the nuts/bolts down as hard as I can, and this seems to fix the issue for a while, but one good offset speedbump and it starts again. I'm sure it can be fixed permanently by having a shop torque things down more, but the question remains: Shouldn't the bolt shaft diameter more closely match the holes in the swaybar and axle bracket?
Just looked. You have a new 12.

I don't think mine clunk at all.

The SB bushings on my Tj's links were wore to sh*t and would make noise.

I would not over torque them. They can bind and most likely become worse.

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