2014-2018 Impala - Sway Bar End Links - Plastic !? - Chevy Impala Forums
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post #1 of (permalink) Old 07-06-2018 Thread Starter
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2014-2018 Impala - Sway Bar End Links - Plastic !?

GM, in their infinite wisdom thought it would be a good idea to make the front sway bar end links out of plastic. I decided I did not like the idea and installed Moog Replacements that are made of good old fashioned steel !! Body roll is a bit improved after install.
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post #2 of (permalink) Old 07-06-2018
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Originally Posted by Bowtie396 View Post
GM, in their infinite wisdom thought it would be a good idea to make the front sway bar end links out of plastic. I decided I did not like the idea and installed Moog Replacements that are made of good old fashioned steel !! Body roll is a bit improved after install.



The original front and rear sway bar links on my 1999 Corvette coupe were composite. They deformed, although the car was driven carefully.

The GM service replacements were made of metal and I used them when I replaced the originals.

I have a 2014 Impala 2LTZ - Ill have to look at mine and see if they are deformed. I now have 33,xxx miles on it.
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post #3 of (permalink) Old 07-07-2018
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classic example of 3D engineered product made of stuff not real-world tested. Reminds me of the "springs" on the Astro Vans. Remember those?

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post #4 of (permalink) Old 07-07-2018
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classic example of 3D engineered product made of stuff not real-world tested. Reminds me of the "springs" on the Astro Vans. Remember those?
GM is my favorite car company (with Ford a close second). But sometimes I think the ghost of Billy Durant is still there making bad decisions. No doubt, they've had some amazing engineering and manufacturing accomplishments. But that gets interspersed with some hard-to-fathom results. The foremost dud that comes to my mind is the mid-70's Oldsmobile diesel. Surely they knew that product wasn't ready for deployment.

As for the sway bar links, looking at the pic, I'm thinking those are composite materials - not just plastic - but I can't imagine a much more stressed element in the entire car.

I know they use composite materials in race cars. Control arms on Indy cars some to mind. But those get used on smooth pavement in races that are 500 miles or less. They don't encounter nearly as many potholes as seen on the Dan Ryan Expressway after the spring thaw

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post #5 of (permalink) Old 07-08-2018 Thread Starter
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I have heard of these deforming over time on various vehicles that use them, I was surprised to find out how many vehicles do use them, many other GM products Ford, Audi and Mercedes among the many others. I am quite sure these are much cheaper to make than metal ones and will just until the warranty expires.
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post #6 of (permalink) Old 07-11-2018
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The Stabilizer Bar is what you are talking about. How is the rest of the system. The actual sway bar any good?
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post #7 of (permalink) Old 07-12-2018 Thread Starter
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The Stabilizer Bar is what you are talking about. How is the rest of the system. The actual sway bar any good?
The Front Sway Bar (Stabilizer Bar) looks good although it would be nice if it was a bit thicker, the rear links and bar are metal and look fine.
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I think GM uses composite sway bar end links for a variety of reasons; weight savings, no corrosion, the joint does not rattle or clunk when it begins to wear (like the metal joints), absorbs vibration, etc.

I have never seen a composite link break - although they do wear out. I have seen various metal links break over the years.
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Originally Posted by 1999 White C5 Coupe View Post
I have seen various metal links break over the years.
Me, too.

I've replaced quite a few of those over the years.

Doug

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post #10 of (permalink) Old 09-20-2018
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So, by saying the body roll is improved by switching to a metal link- you're asserting that the composite links expand and contract under pressure? LOL. The joints can wear out, the much earlier composite types deformed, but the ones on the late gen Impala have no lengthwise variation under load. I suppose if one goes bad eventually, changing to a metal one might make someone feel better- but those wear out, too.
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