Author Topic: TJ Body Mounts.  (Read 1304 times)

Offline Broken99TJ

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TJ Body Mounts.
« on: January 18, 2017, 08:21:28 AM »
OK, Jeeps with frames are little new to me. My TJ body mounts have pushed thru the torque boxes and in one case thru the floor.
The driver side is worst, so yesterday I decided to remove the passenger side body mounts. All good until I got to the front body mount behind the front fender. It's just spinning. I assume the hidden nut is broken off.

Now what?

Offline King of the Hill

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Re: TJ Body Mounts.
« Reply #1 on: January 18, 2017, 08:37:49 AM »
I think you will have to cut a hole in the top of the floor over the bolt.

75 CJ-5        Plow Jeep Still for Sale - $800 w/4way plow
77 CJ-5        Red Jeep - 401, T18, Locked F&R
77 CJ-7        Sons Jeep - Built from Race Jeep remnants
79 CJ-7        Q-Track - Aging gracefully in the woods(well, not much left)
84 CJ-7        Rock Jeep - BYS  (Big Yellow Shitbox) on one tons
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Offline Broken99TJ

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Re: TJ Body Mounts.
« Reply #2 on: January 18, 2017, 08:46:27 AM »
I was afraid that you were going to say that  :cry:

Offline harryhood

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Re: TJ Body Mounts.
« Reply #3 on: January 18, 2017, 09:07:04 AM »
I don't think I would bother cutting the floor. If the nut is spinning I assume the body is rotted there and you can pull the bolt/nut/rusted area out.
"it's like you're playing the triangle"

Offline Broken99TJ

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Re: TJ Body Mounts.
« Reply #4 on: January 18, 2017, 10:36:47 AM »
I'll cut the mount off and take a look, before cutting the floor.

Offline bigdaddymack51

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Re: TJ Body Mounts.
« Reply #5 on: January 19, 2017, 08:03:45 AM »
There is a nut spot welded in there that is spinning.  You (WILL) have to get to it to get the bolt out. If you cant see rot all around the area you aint pullin jack. You skid plate is held on the same way Dude. Inside spot welded nuts.  Dont be afraid of cutting the sheet metal. Its an easy repair , a the correct way of repairing it.   FjR68

Offline harryhood

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Re: TJ Body Mounts.
« Reply #6 on: January 19, 2017, 03:41:48 PM »
I should have stated my suggestion was based on my experiences. The body bolts that were spinning were all rotted to crap and I could pull them right out.

I'm just saying to check for that before cutting the floor. Sure it's easy to repair the floor but why do it if you don't have to.
"it's like you're playing the triangle"

Offline mustangx

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Re: TJ Body Mounts.
« Reply #7 on: January 19, 2017, 04:44:10 PM »
I have been successful with prying down as I used an impact gun to get the bolts out of them body mounts and nutserts in the frame for the belly pans. try a long bar and have someone pry it apart as you try unbolting it.
05 TJ, Rocky Mountain Edition. 4"suspension, 1"body lift, tummy tuck, 37's,456 gears, chrome alloys front and rear, sye and custom driveshafts, over the knuckle steering. fox long travel shocks, fully armored

Offline Broken99TJ

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Re: TJ Body Mounts.
« Reply #8 on: January 21, 2017, 04:59:29 PM »
OK, Day 1 of TJ body mount repair. We are talking January driveway repair in Massachusetts.  :eek: This repair is a DIY job, so it's a going to be a little ghetto.
First thing to mention, is don't even try this job without a 7" grinder and an air hammer. 4 1/2" grinder won't won't cut all the way through body mount bolt and bushing. After this picture was taken I went to HF and bought one.

When you first try and remove the body mounts, try a wrench first and see if it comes loose. You may need a cheater pipe.  If you here crunching that's bad :eek: Next go to the impact but try it slowly at first, this worked for my back mount. Note: Cutting the body mounts out is a real PITA.


I had three body mounts that needed to be cut out. Here is a picture of a hole in the torque box.

Inside picture of the body mount pushing up on the floor.

Picture of removed body mount, with retaining clip. The Jeep had a "1 poly puck at the top.


This is the Home Depot portion of the job. I plan on using more plates for reinforcement later. This is step one  :eek: If this scares you, I plan on bolting thru the floor into the tub also.  :rotflmao: It's a Jeep, most of you have never seen my Broken Cherokee which was an experiment in recycling junkyard parts.


Now the first problem. I removed all six side mounts and loosed the two rear bumper mounts. When I HiLift the body it's not separating from the frame? WTF?


Offline harryhood

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Re: TJ Body Mounts.
« Reply #9 on: January 21, 2017, 05:28:00 PM »
You get the two near the rear shock mounts and the front by the radiator?
"it's like you're playing the triangle"

Offline JeepinMaxx

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Re: TJ Body Mounts.
« Reply #10 on: January 21, 2017, 07:06:22 PM »
I love the Home Depot "erector set" part of the repair!
99TJ Tummy Tuck and SYE, Front D30 with alloy shafts, Detroit locker 4.56, Rear D44, ARB locker 4.56.  Detoursusa.com Rear bumper, Superwinch EP9000 Front Cage



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Offline harryhood

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Re: TJ Body Mounts.
« Reply #11 on: January 21, 2017, 07:38:23 PM »
I would have suggested these instead of the home depot solution.

http://www.rustrepairpatch.com/store/c1/Featured_Products.html
"it's like you're playing the triangle"

Offline Broken99TJ

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Re: TJ Body Mounts.
« Reply #12 on: January 21, 2017, 07:56:10 PM »
Quote
You get the two near the rear shock
Quote
No.
Quote
I would have suggested these instead of the home depot solution.

http://www.rustrepairpatch.com/store/c1/Featured_Products.html
Interesting. This maybe good for the the driver rear mount. It's pretty bad.

Offline Broken99TJ

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Re: TJ Body Mounts.
« Reply #13 on: January 29, 2017, 09:38:03 AM »
Loosening the front body mount was no problem, but I was only able to get the right rear body mount loose even with the 3/4 gun. Once it moved about an 1/8 of a turn, I kept changing the direction of the gun. (on, off, on, off, on, off) This is a procedure that I learned when disconnection a/c lines.

The picture below is of more Home depot stuff. 36"x3"x 3/16 flat bar. I am using this for the back two mounts.


Here is a picture of the DayStar body mount. The instructions wanted you to re-use the existing OEM bushings  :eek: Hahaha I did't even salvage one. I purchased 1/2" pipe from Home Depot to use as the bushings.


I got left two side back mounts installed. In this picture the tub is still partially jacked up. The plan is to sandwich the PoisonSpider Rocker Knocker between the body and the mount. Also purchased 7"x1/2 bolts because I am bolting into the tub floor. I also cut 1" off the mounts to a stock position.


I still have to do the front mount, but how am I going to jack the tub, to get the Rock Knocker on? I am currently jacking the tub with the HiLift.

Offline King of the Hill

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Re: TJ Body Mounts.
« Reply #14 on: January 29, 2017, 11:55:07 AM »
Can you use a trolly jack and a piece if 4x4 and push up under the floor?
75 CJ-5        Plow Jeep Still for Sale - $800 w/4way plow
77 CJ-5        Red Jeep - 401, T18, Locked F&R
77 CJ-7        Sons Jeep - Built from Race Jeep remnants
79 CJ-7        Q-Track - Aging gracefully in the woods(well, not much left)
84 CJ-7        Rock Jeep - BYS  (Big Yellow Shitbox) on one tons
95 Wrangler  Sons commuter Jeep - bone stock 4 popper
97 TJ           Black Jeep on Slinkys
04 Grand Cherokee Overland - Wife's Jeep,  Too nice for me!

Offline Broken99TJ

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Re: TJ Body Mounts.
« Reply #15 on: January 29, 2017, 12:51:35 PM »
Yea, I'm thinking maybe jack the back corner with the HiLift, and lift the floor pan with the floor jack.

Offline bigdaddymack51

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Re: TJ Body Mounts.
« Reply #16 on: January 29, 2017, 10:04:27 PM »
Something has to be holding it. If the body mounts are loose it should at least move that much . A high lift is strong enough to do that.  Dont TJ 4x4 shifters hook on the body and frame or is it body and trany.   Id look again for something you forgot to loosen . Your just jackin the body not the frame mount .    FjR68

Offline Broken99TJ

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Re: TJ Body Mounts.
« Reply #17 on: January 30, 2017, 11:43:41 AM »
Quote
Something has to be holding it. If the body mounts are loose it should at least move that much . A high lift is strong enough to do that.  Dont TJ 4x4 shifters hook on the body and frame or is it body and trany.   Id look again for something you forgot to loosen . Your just jackin the body not the frame mount .    FjR68

I can jack the body fine with the HiLift. The Rocker Knockers require you jack the tub, and slide them in between the body mounts. So I need a different method of jacking the tub.

Offline Broken99TJ

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Re: TJ Body Mounts.
« Reply #18 on: February 04, 2017, 04:43:19 PM »

Turns out, that Poison Spider Rocker Knockers only connect to the back to body mounts for a reason. This lets the DIY'er jack the front of the tub.

Oh yea, here is picture of the middle body mount from inside the tub. It's almost like this little piece of cutoff angle was made for it.  :grinyes:

Once I got the Knocker bolted up to the body mounts, I used the Hi-Lift to snug it up and bolted to the side of the tub.

I still have to do the front body mount on this side. This job is a real PITA, now I know why Tom was avoiding me.

Offline JeepinMaxx

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Re: TJ Body Mounts.
« Reply #19 on: February 04, 2017, 07:25:50 PM »
Looks good!  Glad the rocker knockers I sold you worked out for you
99TJ Tummy Tuck and SYE, Front D30 with alloy shafts, Detroit locker 4.56, Rear D44, ARB locker 4.56.  Detoursusa.com Rear bumper, Superwinch EP9000 Front Cage



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Offline Broken99TJ

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Re: TJ Body Mounts.
« Reply #20 on: February 19, 2017, 06:09:59 PM »
Nice 50 degree February day. I fabricated 16 gauge patch for the front body mount. 6"x7" patch bent in the vice and pop riveted.
Also used 3"x3/6" flat bar to give it some strength. Drilled all the way into the tub.
 


Now all I have to do is the other side  :eek:

Offline Broken99TJ

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Re: TJ Body Mounts.
« Reply #21 on: March 20, 2017, 01:08:22 PM »
Finished up the body mount horror show this weekend. I replaced the six side mounts. Now I have two broken mounts on the driver side. The one near the rear shock ( forget about that  :eek:), which I cut off, and the rear mount.

The following is  link for fixing the rear mount. It involves cutting into the tub behind the rear wheel. That's next.
http://bc4x4.com/faqs/yj.cfm?cat=2&faqid=120

Offline Broken99TJ

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Re: TJ Body Mounts.
« Reply #22 on: March 26, 2017, 05:25:53 PM »
Used a hole saw to open up just behind the rear wheel to expose the rear body mount.
That's a cage with 1/4" square plate inside as a nut. You can see the top of the broken off bolt coming through.

Here is a picture of the fix. I used a 1/2" bolt w/ the nut welded to a piece of metal strip. You can see the cage in the back ground. I used my little friend, the Ingersoll Rand 117 long stroke air hammer, to move it out of the way.

Offline harryhood

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Re: TJ Body Mounts.
« Reply #23 on: March 26, 2017, 05:28:09 PM »
Looks like a miserable job
"it's like you're playing the triangle"

Offline Abrasion Sleeve

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Re: TJ Body Mounts.
« Reply #24 on: March 26, 2017, 07:48:36 PM »
So your not concerned that those pop rivits will fail and rip out when the frame flexes?  I would weld those patches if it were me.
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