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Old 07-16-2004, 09:59 PM
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how to remove body mount bolts

I have searched through the forum trying to find someone with this question but cant seem to find anythign on it.

I have a 66 el camino. I have removed all the bolts and bushings from between the frame and body, except alot of them were so rusted that the bolt head just snapped off. Now How would i go about getting the rest of the bolt out of there? I know this isnt goin to be easy... are these bolts grade 8? Could I drill them out? or is there an easier way?

year one supplies all the hardware and new bushings i need, but i cant get the old stuff out.

thanks for any tips!!

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Old 07-17-2004, 11:16 AM
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If all the bolts are either out or broken off, you can jack one side of the body up nice and high (don't forget to disconnect steering column, maste cylinder, e-brake cable, transmission mount, fan, fuel lines at tank ect...).
Then, take out all the body bushings.
If there is enough of the broken bolt left, take a nut that slides onto it and weld that nut to the bottom of the broken bolt.
Then shoot the bolt with a s$$tload of WD40 or ATF and let it soak nice and long ( you may even have to drill a tiny whole in the floor to do so)
Then you can try to unscrew the bolt.
I had this problem a couple months ago with my Monte and before trying to unscrew the bolt, I heated the body plate that it screws into w/ a brazing torch, this loosened things up even further and the bolt came out without to much trouble.

Now, assuming there isn't enough of the bolt left to weld anything to, you're probably going to have to cut a hole in the floor, and pull everything out that way.
When it's time to put the new mounts in, you can fab up a plate for the bolt to screw into out of a nut and some 1/8" plate wedled togther.

Either way, it's a quite a bit of work, but be patient, and it will pay off.

I hope this helps, post back if you need any more info.
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Old 07-17-2004, 12:39 PM
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wow, I never knew that was such a big job. What are some of the benifts of new bushings? i'll have to find a welder, or someone that welds.
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Old 07-17-2004, 01:49 PM
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I know it's a lot of work, but you could do it over the weekend.
Having a welder would really help you with this kind of job.
But, if there is enough of the bolt left sticking out of the body, you might be able to get at it with some vice grips, just make sure the body plates have been soaked in oil and heated with a torch.

I use poly mounts in my monte, and I haven't driven it since putting them in, so I can't say anything about a differenc in handling.
But, after i took out the stock rubber bushings and pinched either as hard as I could, the poly ones only flattened out about a thirt as much as the rubber ones, so the body/frame structure should be a whole lot more solid, which should improve handling.
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Old 07-17-2004, 02:28 PM
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If I read the post correctly, you were trying to loosen the body bolts from the inside of the cab, and the bolt heads torque twisted off or just broke. Try squirting WD40 or some other type of lubricant in the holes and let it sit for a while. Then take a drift pin approximately the bolt shaft size and whack it with a 2.5 hammer. Or use an air chisel with a straight shaft if you have one. Good Luck
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Old 07-17-2004, 05:05 PM
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I did a frame of (change) on my 66 and every bolt was rusted into.

All of the body bolts go in from the bottom. There is a large square nut in side of the floor braces at each mount that goes into the cab floor, from the bottom split the floor brace to get access to the nut, heat with a torch, try to screw the bolt back through the nut. If you can't then remove the nut and go to the vice or get a new nut and re install it, then weld up the split. The two at the front of the firewall can be reached from the front top.
The ones under the bed are screwed into a tower with a nut inside, just cut one side of the tower to get access to the nut. There are two at the very back, the nuts are inside of a channel.
split it the same way, nut it and weld it back up.

The holes in the frame will probably need repaired also. Good Luck

Troy

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Old 07-17-2004, 05:13 PM
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Like Troy stated...heat them with a torch. But before you do that soak them real good with some PB Blaster. This stuff works great for loosening rusted parts. It does have a lingering odor though. When you heat them do not try to attemp to back them all the way out. Instead work the bolt back and forth a little at a time and a little more each time. This will keep you from busting it off again. And if you are going to get under there with a torch...REMOVE THE GAS TANK FIRST!!!! Use some common sense and remove anything that will cause the potential start of a fire on the car. Gas tank, gas lines out of the road, brake lines out of the way, and no rags under the car while you are working. If a fire would happen to start I can almost guarantee it will move faster than you can.

Kevin
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Old 07-18-2004, 08:48 AM
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Kevin I'm not tryin to be a ******** here but wouldn't the PB blaster catch on fire too when heating it with a torch since it is an oil based product I only ask cause I've never taken a torch to a bolt I covered in blaster.
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Old 07-25-2004, 05:39 PM
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Thumbs up Rusted Bolts

Try this for rusted bolts... Heat the nut, then as the nut cools (allow some cooling time or the penetrating liquid will instantly vaporize) apply the penetrant. As the nut cools it will draw the penetrant into the threads. Good luck. Walt
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