XJ rear upper shock mount bolt size, dont BS if you never done it. - JeepForum.com
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Unread 07-06-2014, 11:02 PM   #1
TylerU
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XJ rear upper shock mount bolt size, dont BS if you never done it.

So I took all 4 rear upper shock mount bolts off without snapping any of them. But from their nasty, rusty look I dot wanna re-use them to create future hassle. The problem is, because of the rust or whatever it is, they won't fit in any of the bolt sizer in ace hardware. Anybody have confirmed size for these bolts.please .

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Unread 07-06-2014, 11:05 PM   #2
TylerU
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And people in other thread says M8, other says 5/16 will do. Apparently I tried both, and they won't screw all the way in, got stuck after the first a few thread.
So please give information only if you have actually used them on the mount. I don't wanna cross thread.
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Unread 07-06-2014, 11:16 PM   #3
Xride
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Search on how to smash those nuts out, and then use 3/8 bolts and nuts. If you don't have your shocks yet order the bar pin eliminator, it'll open up the shocks available too.
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Unread 07-06-2014, 11:22 PM   #4
TylerU
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Quote:
Originally Posted by Xride
Search on how to smash those nuts out, and then use 3/8 bolts and nuts. If you don't have your shocks yet order the bar pin eliminator, it'll open up the shocks available too.
What if I don't wanna smash the nut?
I already have my shocks mounted to the bottom.
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Unread 07-06-2014, 11:36 PM   #5
Xride
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Quote:
Originally Posted by TylerU View Post
What if I don't wanna smash the nut?
I already have my shocks mounted to the bottom.
Well.
You know how crappy the bolts were to try and thread into the nut at the store.... the nut is that crappy too. It's also metric.

M8x1.25 x 25. Being in 'Merica you might have a hard time finding them without ordering.
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Unread 07-06-2014, 11:38 PM   #6
TylerU
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Why is Chrysler so retarded using metric measures?
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Unread 07-07-2014, 12:16 AM   #7
Xride
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Imperial is dead, has been for a long. The USA is just reluctant to let go of it.
Doing the rest of your lift you'll notice that metric sockets fit nicer just about everywhere.
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Unread 07-07-2014, 12:41 AM   #8
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USA, Liberia and Burma are the only places left where non-metric measurements are common.

In Burma a miyaw is about 3/16" and there are 4 in a let thit which is about a 12/16". I would buy a bolt of 2 miyaw, though with a hnan thread, not a 5 sanchi thread, which would be too fine.
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Unread 07-07-2014, 07:58 PM   #9
TylerU
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Quote:
Originally Posted by Xride

Well.
You know how crappy the bolts were to try and thread into the nut at the store.... the nut is that crappy too. It's also metric.

M8x1.25 x 25. Being in 'Merica you might have a hard time finding them without ordering.
Sorry but M8 my ***, bought 4 they can't fit in.
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Unread 07-07-2014, 08:14 PM   #10
Xride
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Sorry but M8 my ***, bought 4 they can't fit in.
Don't know what to tell you. The manual says that's what it is.

But like I said, the nut is just as nasty as the bolts were.
Had you pulled the carpet back and smashed the nuts off and just bolted it up you'd have been done by now.
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Unread 07-07-2014, 08:45 PM   #11
TylerU
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Quote:
Originally Posted by Xride

Don't know what to tell you. The manual says that's what it is.

But like I said, the nut is just as nasty as the bolts were.
Had you pulled the carpet back and smashed the nuts off and just bolted it up you'd have been done by now.
Really? My bad then.
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Unread 07-07-2014, 10:23 PM   #12
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With the exception of a few fasteners on the block, and lug nuts your Jeep is chock full of metric fasteners. So is every other vehicle made in and out of the US for more than the last 20 years. Metric is the standard. SAE is not. You will find that 8, 10, 13, 15, 17, and 19mm are the most used sockets when wrenching. They will be the right fit as opposed to an SAE that is close enough.

The factory service manual calls for .312-x18x.875 - that's a 5/16 x18 fastener. That's actually fairly surprising as M8 is very common throughout.

What you need to do is chase the threads out to clean up the corrosion and years of decay. Taking your head out of your *** for something as simple as shock absorber fasteners would also be a good start. You're taking 4 bolts pretty seriously here.

If you're actually handy you could drill out the nuts in the frame and tap them to whatever you wish to use - including your heavily invested set of M8 bolts.

Or continue to ***** online.
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Unread 07-08-2014, 07:29 AM   #13
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Seems like a lot of fuss for a simple endeaver. I took a punch and 3lb hammer and knocked the weld nuts out (easily I might add), fished new bolts in from the top and secured with nuts in the bottom. Took no time.
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Unread 07-08-2014, 10:21 PM   #14
chris87xj
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^This. The original nuts aren't in any better shape than those nasty bolts you took out. I'd replace them with the hope the new ones will still be workable the next time you want those bolts removed. A little anti-seize helps too. Here's a good related discussion. Shock bolt replacement: a fix with pics
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Unread 07-08-2014, 10:44 PM   #15
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Yeah everybody is right. I shoulda knock the nuts off and replace with new ones.

But after all the mayhem with the front bar pin and pressing JK shocks metal collar, plus punching the bolt on the rear leaf spring,
I don't have any more patience left. So I bolt up the old crap and just let it drive for now.
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