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Repro urethane bumper question

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Old Oct 31, 2005 | 11:10 PM
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Default Repro urethane bumper question

I just received a bumper from Ecklers this weekend. Is it normal to have the molding edges overhanging around the top and side edges where the bumper meets the body? It looks like I'll have to do some shaping to get a good line. Is that all normal?
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Old Nov 1, 2005 | 08:40 AM
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I've bought two front bumpers, both had stuff on them and both had to be ground to fit. I've heard that the jigs used to assemble vettes were constantly adjusted so no two of them have the exact same dimensions. Maybe that's why the extra material is there.

Bill
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Old Nov 1, 2005 | 09:36 AM
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Be thankful that it only needs minor fitting.

My first rear on the '75 fit really good, just some minor fitting. Took it out for a drive and got rear-ended, not enough to do any real damage EXCECPT to the cover, which shattered. Now doing it all again. Same vendor and the cover is NOT the same fit. The right side has at least a 3/16" hangover. And yes they were both the Flex type and not solid Fiberglass. Still, there is not enough flex in Flex. In a way I wish the urethane was still around and reasonable enough to purchase.
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Old Nov 1, 2005 | 09:47 AM
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Originally Posted by KenSny
...In a way I wish the urethane was still around and reasonable enough to purchase.
Ken. I purchased an Eckler's '74 True Two piece "Flexi-Fit" rear bumper BECAUSE an exact repro is NOT available for the '74 rear. It did come out beautiful, looks stock except minor, minor differences that 99% of the people don't know about. Tried getting a '73/'74 "Flexi-Fit" for the front that wasn't even close. Ended up buying that GM Restoration Parts '73/'74 front bumper for $549, but it went on in minutes and due to the "flexibility" & "moldability" of that urethane, it came out perfect. I now understand why GM used it in the first place-you can mold, bend & shape it to fit.
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Old Nov 1, 2005 | 02:41 PM
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Paul, I am so ticked off with fit of this second rear cover that I have not even touched it since July, and it still sits...... probably will until Spring. I'd sand down the edge of the cover except that the area is so thin the mounting lip/flange would not be solid anymore. You'd really have to build up the inside of the cover in order to make it solid. It's a shame that the Quality Control is just not there when they crank these things out.
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Old Nov 4, 2005 | 01:04 AM
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Originally Posted by KenSny
Be thankful that it only needs minor fitting.

My first rear on the '75 fit really good, just some minor fitting. Took it out for a drive and got rear-ended, not enough to do any real damage EXCECPT to the cover, which shattered. Now doing it all again. Same vendor and the cover is NOT the same fit. The right side has at least a 3/16" hangover. And yes they were both the Flex type and not solid Fiberglass. Still, there is not enough flex in Flex. In a way I wish the urethane was still around and reasonable enough to purchase.
I tried the flex fit also. It was so far off I had to send it back. It seems from info on this forum some fit very well and other fit like crap. I purchased the ureathane rear bumper from eckler's. It fit very well. The only problem with this bumper is that the indentions for the letters are not molded into it. To solve this problem I made a template from the old bumper. I used this template to mark the positions on the new bumper. I used a dremel toll and very carefully made the indentions to less than a 16th of an inch. There is enough material or thickness in this area to do this. If you dont want to try this you can use the rear emblem off a 76 or 77.
Hope this helps
Steve
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Old Nov 4, 2005 | 09:52 AM
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Originally Posted by KenSny
Paul, I am so ticked off with fit of this second rear cover that I have not even touched it since July, and it still sits...... probably will until Spring. I'd sand down the edge of the cover except that the area is so thin the mounting lip/flange would not be solid anymore. You'd really have to build up the inside of the cover in order to make it solid. It's a shame that the Quality Control is just not there when they crank these things out.
Minor shaping can be done on the bumper. Any major fit problems/adjustments (adding filler) need to be done to the body. We use urethane covers unless the customer specifies fiberglass.....much easier to work with. G/L
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