Broken Clevis bolt

bigjimslade · **Joined:** Thu Jan 13, 2011 2:37 pm **Posts:** 100

When I was doing my lift last year and then my LBJ's just two days I ago i used this thread as a reference for sizes and torque settings
viewtopic.php?f=16&t=31005

It shows the torque for the upper clevis to be 100lbs. We weren't able to get it past 80 on the drivers side then when we did the passenger side the bolt snapped at 60lbs. I have found that some things were different on my 07 KJ (ball joints being one of them). Maybe this isn't supposed to be 100lbs on the 07's? Does anyone know what the size of this bolt is and where to get them? I might have to go through a dealer but thought I'd check here. I did find a local place that specializes in bolts and fasteners and found a good match in a grade 8. However, the original bolt had threads the whole length and the new one did not. We did put a couple of washers by the head to make sure it had plenty of threads left on the other side. The thing is that I'm now hearing a little noise on that side when going over some bumps. I'm wondering if it's because we can't get that bolt tight enough or something. Also, is it true that you should tighten the upper clevis bolt with the tires mounted and on the ground?

tjkj2002 · **Posted:** Thu May 24, 2012 11:32 am

Those bolts are smaller for '07's so less torque is needed(something like 60lbs-ft),they are metric threads also so you needed a 10.9 grade bolt,what actual size I can not say as is not listed in the '07 parts book(only listed as "bolt").

bigjimslade · **Joined:** Thu Jan 13, 2011 2:37 pm **Posts:** 100

The dealer told me Metric 10 x 1.5 x 65mm grade 8. I got a 10 x 1.5 x 70 (they didn't have 65mm). So there's a grade 10.9 bolt? I'll call the place I got it from and see if they have this. Do you think the bolt I have should hold up for a couple of weeks (no off roading)? I'm actually supposed to do about 1000mile road trip this weekend (all interstate and road driving). I was planning to just have the dealer order me one (or maybe two) and replace them when I put in the correct Moog ball joints.

tjkj2002 · **Posted:** Thu May 24, 2012 12:45 pm

Only SAE bolts use grade 5 and 8,metric bolts use grade 8.8 and 10.9 scale.Grade 5 SAE equals metric grade 8.8,grade 8 SAE equals metric grade 10.9.

bigjimslade · **Joined:** Thu Jan 13, 2011 2:37 pm **Posts:** 100

As always, very good info.

So is it true that you should tighten the upper clevis bolt with tires on the ground?

At The Helm · **Posted:** Thu May 24, 2012 8:26 pm

Also check the sway bar end links with the tires on the ground as that seems to be a clunking culprit after suspension R&I.

bigjimslade · **Joined:** Thu Jan 13, 2011 2:37 pm **Posts:** 100

Back from my trip safe and sound. Jeep was fine (except the aforementioned clunking).

Atthehelm, so you think I might need to tighten the sway bar end link with the tires on the ground?

tommudd · **Posted:** Thu May 31, 2012 2:19 pm

Any suspension part like that should be tightened with full weight on it/them
i.e. sway bar links/ control arms etc

bigjimslade · **Joined:** Thu Jan 13, 2011 2:37 pm **Posts:** 100

I'll be doing this whole project again soon now that I have the correct Moog ball joints from JBA (did I mention their great service!). Also getting 2 of the clevis bolts from a dealer. I'll make sure to tighten things up with weight on them this time. If I can get a hold of a burr bit and die grinder I might add some more clearance to the UCA pockets just to be sure. They seem to ride awful close to bottom of the pocket so I thought maybe the noise could be coming from that.

Cardhu · **Posted:** Wed Jul 18, 2012 3:03 pm

bigjimslade wrote:

I'll be doing this whole project again soon now that I have the correct Moog ball joints from JBA (did I mention their great service!).

I presume you bought K3199 LBJ initially. I picked them up also for my 2007 when i get around to it.. Did they not fit? I've seen the conflicting part number on rock auto but the hub assembly is the same for all those years, hence why i bought the 3199s as they are listed here there and everywhere as the preferred part replacement.

If they didn't fit, what was it? More specifically, why won't they fit?

Thanks

Broken Clevis bolt

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