The Body Shop TECH General questions that don't fit in any other forum

          
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Old 01-11-2009, 09:40 PM
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vamman1 vamman1 is offline
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Default Gonna lift body of frame...

First, "just" thought I'd pull drivetrain to replace gaskets, tranny work, etc.
So I decided to remove fenders, rad, front clip.

I need welding on the frame. (Bend area by all 4 wheels are bad)

So now I'm thinking why not lift body, roll out frame?
I am not a mechanic, mechanical engineer, not a mechanic.

Am I way in over my head or if I brace the body (convert) with interior out, is it REALLY a big job. Besides releasing mounts, lines, electrical how bad is it?

How bad is it putting it BACK??? She really needs welding on the frame.

Thanks

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Old 01-11-2009, 10:46 PM
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it doesnt matter how bad it is, just look at it as a learning experience. Removing the frame isnt hard, the only lines you need to remove are the brake lines to the master cylinder. You will also have to disconnect the Ebrake and cables from the body, everything else stays on the frame . I wouldnt take the frame off though unless you have the money to keep going on the project, because if you run out of time or money that frame may not get back on that car for 20 years, iv seen it happen.The moral of the story is dont bite off more than you can chew at once!

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Old 01-11-2009, 10:51 PM
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When I did a frame off on my 67 GTO I made some saw horses out of 4x4s. Just tall enough to clear and legs wider than wheels. Four of us where able to lift body and put it back on. Those saw horses have been handy for other pojects also. Good Luck

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Old 01-11-2009, 11:00 PM
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I used the same principle as beemegary except I did it by myself using an engine hoist and strap to lift one end at a time.

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Old 01-12-2009, 09:14 AM
dhutton dhutton is offline
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The worst part of the job will be removing the body mount bolts. Most likely at least a couple will break or the cage nuts will spin. Then you have to do some cutting.

Don

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Old 01-12-2009, 09:28 AM
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a word of advise, Id keep the top up & latched. I would keep the doors closed & the windows down & NEVER open the doors when the body is off the frame. CROKSTER i think is the name did a thread on how to lift the body off with an engine hoist & a 4x4.
Find that thread, & the rest is easy. I can also say, when you get this deep there is no turning back... the more you dive in the more you will find areas that need more attention, just be prepared to fix more than you thought & spend more than you thought.......

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Old 01-12-2009, 10:27 AM
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Buddy dropped by Saturday night for a drink and when he saw the car he said the same thing! "Seems you've passed the point of no return!"

The dedicated "saw-horses" sounds like a good idea. Carpentry is my thing; just learning metal work.

Keeping the doors closed and top up: will I still need to brace the body?
If I run 2x6's on both sides of the car like a "joist" to jack on, should that be sufficient?

There is no where to get a powder-coat around here. What is the finish alternative?

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Old 01-12-2009, 10:41 AM
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If you are a mechanical engineer then you shouldn't have any problem...



All good advice here; just a couple minor comments:

a) Yes - a 2x6 makes a good "joist". I had a couple that were left over from the kids' playscape and that's what I used when I took the body off my Chevelle. I lifted the body using two floor jacks (one on each side of the 2x6), then lifting one end of the car at a time.

I narrowed the frame on my car while I was doing this, so I had the body on and off about 15 times as I was fabricating/making clearance.

b) Also - if you have a couple bare wheels (wheels with no tires on them) you can bolt that to the axle in place of tire/wheel assemblies. That will make the frame lower and you can roll it in and out without having to get the body up so high.

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  #9  
Old 01-12-2009, 11:08 AM
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The bare wheels sounds like an idea.
I have the old tires and wheels that came with the car. If I remove the tires, I could support the body all around, install wheels only and block the frame. Remove body mounts and then lower frame by removing blocking. Then roll frame out the door!

Sounds way too easy!

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Old 01-12-2009, 06:11 PM
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I,too,have removed my convert body from the frame using an engine hoist and floor jacks,then had the body put on my trailer using 2 4x4's and 4 ex-football players that owed thier former coach a favor.LOL.doors were off but car is braced from hinges to quarter column and cross-wise with home-made braces.Try and squirt the body mount bolts with penetrant repeatedly before you attempt to remove them,this may help.I had three out of i think 14 give me a problem.For an alternative finish to powder coat,get some black epoxy primer at 50-60 gloss if you can at your auto paint store,and put on 2-3 coats IMMEDIATELY after sandblasting the frame.on the frame,make sure the blaster uses sand,and get a "near-white"blast,not a "brush-blast",your blaster will know what that means.If you can't find black epoxy at the right gloss, the use epoxy primer and recoat with a 2K urethane "chassis black"type product.If you are gouing to use the 2k chassis black,do not skip the epoxy primer underneath.If it's high quality epoxy,it will hold up as good and alot of times BETTER than powder coat for stone-chip and corrosion.I KNOW there are alot of people that will disagree with my last statement,but I have inspected literally hundreds of salt-fog and gravel-o-meter panels and reams of test data to support my case.Good luck.

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Old 01-12-2009, 06:55 PM
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Definitely brace across the doors front-to-back and side-to-side.

George

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Old 01-13-2009, 07:07 AM
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Bracing will be done!

"Salt-Fog" Paint Guy?..... So you've been to Newfoundland?

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Old 01-13-2009, 05:20 PM
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I just finished removing the 14 body to frame bolts on my '64 Tempest. Of the 14, only 1 unscrewed without shearing off. In fact, some were so rusted the bolts were necked down to about 1/8 in. dia.

I have also just purchased four 12 ton (yes, 12 TON) jack stands to sit the body down on. A 4X4 will just fit comfortably into the notch of the jack stand head and they raise to between 22 and 30 in.. Should work just fine. I will be using my engine hoist to lift one end of the body at a time and will remove the rear wheels if necessary to roll the frame out from under.

Phil

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Old 01-13-2009, 06:16 PM
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Quote:
Originally Posted by vamman1 View Post
Bracing will be done!

"Salt-Fog" Paint Guy?..... So you've been to Newfoundland?
almost went to Newfoundland once...entered a contest where first prize was a 1 week vacation to Newfoundland....2nd prize was 2 weeks!3rd prize...you know where this is going... Actually would love to go there..heard there are lots of good "motorcycling" roads. On a serious note:a salt-fog cabinet(sometimes called salt-spray cabinet)is an enclosed chamber,that has a 5% salt solution(atomized'hence the "fog"designation)pumped into it.Painted Test panels are scribed to bare metal,then inserted into the cabinet at a 15* angle from perpendicular to give the salt solution a chance to collect on the surface.Panels are periodically inspected for surface corrosion,corrosion creepage(under the scribe)and blistering.Amount of surface corrosion,creepage and the size of the blisters(if any)are measured and used to establish a "salt-fog" rating for that particular primer or paint.Hope this helps.

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Old 01-13-2009, 09:22 PM
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Yeah, fog-cabinet.. i.e my driveway. See Avatar! (Atlantic Ocean)

14 BODY BOLTS!
Gonna lose whatever religion I have left on this project.

Drove the car this past summer like a grandmother for fear of the chassis.
That's not why I bought it so she's coming off!

It's amazing how hard it is to find anyone willing to do a bit of welding.

  #16  
Old 01-14-2009, 07:50 PM
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Get a good welder and learn yourself, you'll be way ahead even if you spend $1000 on the welding rig. I have a Miller 135 110V unit with an auto-darkening helmet. I taught myself MIG and performed all repairs on my car.

If I can do it, anyone can.

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Old 01-14-2009, 08:41 PM
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Default hoist

I used an engine hoist when I did mine. It worked pretty good, but your floors should be pretty solid before you try it. Mine is a hard top but i still braced the door openings.
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  #18  
Old 01-14-2009, 09:26 PM
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Hi V1,

I am in the same spot (although this is the 2nd go round for me). Hopefully the last for this car, LOL!

If you are good at carpentry, you may want to consider building a body-cart. I did mine out of 4x4's and 2x4's. I will be taking the body off (knock on wood - or my noggin!) tomorrow. My body-mount bolts came out fine (they are only 16-17 years old and have not seen winter).

I am using two (2) engine hoists. We also made the supports for the body-cart like a 'truss' so it would support the car, and I can work under it. Body cart is on 10" rubber wheel/casters (rated at 400lb's each). The truss ensures that the load is transferred over to the 4x4 posts. There is also an opening at one end to allow someone to work underneath (and to exit). We have also gusseted the 'open-end' to prevent shear/spread of the legs (the wheels will also be 'chocked' when we work under it, with 1 engine hoist connected to the block/tackle as a redundant safety measure).

I am not a carpenter, but paid a good friend to put it together based on an example I saw on Chevelle-Tech (just improved it).

I was going to build an auto-rotisserie (and had bought the plans off of e-Bay). The plans were great, but it was a project in itself, and I felt it was over the top for what I needed. Also, my car has already been sandblasted/primed/seam-sealed/painted underneath. Only trying to get to a more correct 'chassis' black underneath. Also, I didn't like that the rotisserie does not support the car from underneath (at structural points). My car is solid, but it could still sag when separated.

Hopefully I can post some pics once we have the body-cart fully assembled (it is ready to go as of this evening) - limited space means I have to hold off final assembly until the 'separation' of car and frame.

Best of luck,
Brian
'72 GTO

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Old 01-15-2009, 09:34 AM
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I've arc welded in the past and have seriously thought about taking it on but time is limited for me over the next few months plus the Pontiac is in the "house" garage as I have a RV and Packard in the "lower" garage so welding in the "house" is not an option.

I'd prefer to do it myself but don't see being able to.

Post some pics of your body-cart when possible GTO406.

It's a little intimidating to see the car lying in pieces!

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Old 01-15-2009, 10:42 AM
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I agree with gto406, if your good at carpentry build a body dolly so you can wheel the body outside in case you need to remove undercoating/sandblast. When I removed my conv. body from the frame I used 2 engine hoists and raised it evenly. I took the conv top frame off but left the doors on. I also made a brace from 2x4 that went from the firewall to the rear centered over the trans tunnel. I temporarily set the car on 2x10's and rolled the frame out. Then rolled the dolly under the body, reattached the hoists and set the body on the dolly. I built the dolly high enough so when the car was on it would just fit under my garage door opening. Like others have said, once you get started it ends up being more work than what you anticipated. Be prepared and put your body on something that can be moved around in case you want to work on the body outside.

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