Front suspension lower A-arm rear inner mounting point brace cracking - Chevy Impala SS Forum
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post #1 of 13 (permalink) Old 05-09-2017, 08:54 AM Thread Starter
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Front suspension lower A-arm rear inner mounting point brace cracking

I could not find prior discussions about this using search. My car is a '95 Caprice 9C1. While lubing the front suspension recently, I discovered cracks in the braces that connect the frame to the rear mounting point for the lower A-arm (I have pictures but the files are too big to attach). This seems much less serious than the actual frame cracking that some drag racers describe in some of the posts that came up in the results from my searches. In fact, when I am under the car, it takes me back to my '73 Pontiac Grand Am which looked nearly identical underneath except that brace did not exist, IIRC. The hole seems to have stopped the cracking on the driver side, but it looks like the crack is starting on the other side of the hole on the passenger side. My questions are: Is this common? Should it be repaired? What is the best practical way to repair it? I know that just welding the crack will not work. Welding makes the steel brittle so the crack will form again.

Last edited by Frontenac; 05-09-2017 at 09:14 AM.
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post #2 of 13 (permalink) Old 05-09-2017, 09:48 AM
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I've got to run off to a meeting so I can't answer your question, but thought I'd offer this URL for COMPRESS IMAGES ONLINE-FREE to help you post some pictures to help show the problem.

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post #3 of 13 (permalink) Old 05-09-2017, 10:47 AM
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Just use photobucket to host the pictures. It's free.

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If you really can't do it shoot me a pm and you can email the pics to me and I'll put them up.
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post #4 of 13 (permalink) Old 05-09-2017, 02:52 PM Thread Starter
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Cursing is not allowed here so I will just say that reducing the file sizes was about as much fun as a DIY appendectomy without any pain reducer. But, I am stubborn enough to get it done. The picture on the left is the passenger side. IMO, Bill Gates is the greatest con man the world has ever seen.
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Last edited by Frontenac; 05-10-2017 at 08:21 AM. Reason: add word to clairify
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post #5 of 13 (permalink) Old 05-09-2017, 03:25 PM
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A bunch of folks on here cut those braces completely off so their headers have more clearances. I wouldn't worry that much about them. Any decent welder can get to them if they really bother you.

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post #6 of 13 (permalink) Old 05-09-2017, 08:51 PM
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On the 91-3s that brace is bolted on. I removed mine to get the header in on the driver's side. You won't notice it unless you are doing some serious road racing.

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post #7 of 13 (permalink) Old 05-10-2017, 08:29 AM Thread Starter
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Judging by the responses so far, it must not be a common problem. If anybody has had the problem and made a successful repair, I would like to see pictures of the repair. I don't like welding overhead, but I am willing to do a repair if it is not too complicated and I know that it will work.
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post #8 of 13 (permalink) Old 05-10-2017, 11:31 AM
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Quote:
Originally Posted by 1slow96 View Post
A bunch of folks on here cut those braces completely off so their headers have more clearances. I wouldn't worry that much about them. Any decent welder can get to them if they really bother you.
Jeeze, I'm still learning something almost every time I read the forum even after 13 years. I had never thought of completely removing them....

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post #9 of 13 (permalink) Old 05-10-2017, 06:53 PM
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You could also just weld the cracks, and leave them alone otherwise.

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post #10 of 13 (permalink) Old 06-08-2017, 12:45 AM
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I would weld the cracks just for piece of mind. I haven't had that issue on a b-body but I have completely reinforced a frame with 3/16" steel and grinded 98% of the welds smooth. You'll spend more time setting the welder up than anything.

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