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1970 Body Question

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Old May 2, 2008 | 10:27 AM
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Can anyone tell me if the original front clip materials are FRP fiberglass or are they of the SMC variety. I need to buy an adhesive which is specific to the fiberglass type. Thanks
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Old May 2, 2008 | 11:20 AM
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Wombvette just posted this history snippet in paint and body; "The glass started its revolution in 69 with the doors. This was an intermediate product called Genite. These panels were worked in as time went on until 71 when the first SMC panel, the rear quarter panel, was introduced. This early SMC is not quite the same as the modern SMC but it was SMC. Panels were continuously added until 74 when the whole outer body was SMC. The last polyester panel was the 73 rear deck."
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Old May 2, 2008 | 11:34 AM
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I think if you use an epoxy adhesive you don't have to worry about it.

Ralph.
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Old May 2, 2008 | 03:20 PM
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Originally Posted by rponfick
I think if you use an epoxy adhesive you don't have to worry about it.

Ralph.
True, but if he wants to use the more correct polyester on the `70 that would be perfectly OK.
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Old May 2, 2008 | 03:41 PM
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In doubt you can always use expoxy based adhesive.

When sanding the panel, a smc will have a marble looking surface, almost uniform in structure with no apparent fibers showing.
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Old May 5, 2008 | 12:52 PM
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Thanks.

This is to bond the v-shaped support under the nose of the C3 to the fiberglass body above. Apparently, mine separated causing the headlamp to appear below the body when the case is the opposite.
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Old May 5, 2008 | 02:26 PM
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In my observation over the years, the SMC fiberglass began showing up on rear quarters (fenders?) of the 1972 model. Not only is the bare texture different in appearance, but it has a different slicker feel as well. The easiest way to tell a panel is by looking at the thickness of the rear wheel wells on a '72. It is noticeably thicker, most '73's are of this material.
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Old May 7, 2008 | 12:26 PM
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Should I attempt to remove and replace the V-shaped cross member support under the headlamps or try to expoxy them? I see that the original set-up was with the soft aluminum rivets. Is this a difficult weekend driveway task?
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Old May 7, 2008 | 03:30 PM
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Originally Posted by 70454
Should I attempt to remove and replace the V-shaped cross member support under the headlamps or try to expoxy them? I see that the original set-up was with the soft aluminum rivets. Is this a difficult weekend driveway task?
If it is already partially loose, the best method would be to totally remove it so you can clean up and prep the parts for bonding. It is a rather involved job because you have to remove and reinstall all of the HL stuff. You can also cleanup or replace the rivets which are a source of other problems.
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Old May 7, 2008 | 04:12 PM
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Wombvette,
I'm confused. What are the various panels made of for my mid-January, 71 Coupe.
Thanks!!!
Regards,
Alan
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Old May 7, 2008 | 05:41 PM
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Originally Posted by wombvette
If it is already partially loose, the best method would be to totally remove it so you can clean up and prep the parts for bonding. It is a rather involved job because you have to remove and reinstall all of the HL stuff. You can also cleanup or replace the rivets which are a source of other problems.
Thanks...

Luckily, the headlamp stuff can unbolt directly from the crossmember without too much hassle. Some of the bolts are going to require some creative wrenching. If I decide to undertake this project, I'm planning on replacing all of the soft aluminum rivets in that area and bonding with epoxy. What type of epoxy should I use for fiberglass to metal?
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Old May 7, 2008 | 08:50 PM
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Originally Posted by Alan 71
Wombvette,
I'm confused. What are the various panels made of for my mid-January, 71 Coupe.
Thanks!!!
Regards,
Alan
Almost everything on a `71 except maybe the rear quarters will be old polyester fiberglass.

Originally Posted by 70454
Thanks...

Luckily, the headlamp stuff can unbolt directly from the crossmember without too much hassle. Some of the bolts are going to require some creative wrenching. If I decide to undertake this project, I'm planning on replacing all of the soft aluminum rivets in that area and bonding with epoxy. What type of epoxy should I use for fiberglass to metal?

There are many epoxies that will work, most all of them in fact, but look for one with a putty consistency so it will stay where you put it. I like a product supplied by Wurth. It is black and has pretty good consistency but many others are just as good for bonding. 3M, Fuzor, etc.
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Old May 8, 2008 | 11:06 AM
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Originally Posted by Alan 71
Wombvette,
I'm confused. What are the various panels made of for my mid-January, 71 Coupe.
Thanks!!!
Regards,
Alan

Alan,

Both of my '71's are all the old polyester fiberglass panels, one is Mar 18 build date, the other is Apr 20 build date.
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Old May 8, 2008 | 01:19 PM
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Originally Posted by 70454
Thanks...

Luckily, the headlamp stuff can unbolt directly from the crossmember without too much hassle. Some of the bolts are going to require some creative wrenching. If I decide to undertake this project, I'm planning on replacing all of the soft aluminum rivets in that area and bonding with epoxy. What type of epoxy should I use for fiberglass to metal?
Two important things here. From what I've seen and read, you need to go in through the top surface of the surround to basically dig out the old rivets. Most guys don't bother with them when rebonding.
Secondly when you're bonding the crossmember, bolt the head light assemblies in place (center the pivot bushings in the support frame first) so you can position the assemblies as close to centered in the openings as possible. Saves a lot of time later trying to line them up.
Just a thought.
Glenn
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Old May 8, 2008 | 02:51 PM
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Originally Posted by GD70
Two important things here. From what I've seen and read, you need to go in through the top surface of the surround to basically dig out the old rivets. Most guys don't bother with them when rebonding.

Glenn
Why would you want to go through the top when you are removing the bar from the bottom? You dont want to do that. The least holes in the upper panel the better. Remove and clean up everything from the bottom.
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