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For those who have done poly bushings

 
Old 07-09-2019, 11:14 PM
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AudioObsessions
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Default For those who have done poly bushings

Question. I replaced all bushings with poly. The car is not on the road yet but just pulling it in and out of my garage and the quick trip up and down the block, I hear creeking sounds coming from the rear and slightly from the front. And before anybody asks, yes I lubed the hell out of the bushings. Am I to assume that they are making this sound because they are new and they just need to wear in a little? What have been your experiences?
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Old 07-09-2019, 11:33 PM
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Mr. Peabody
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I had all of the bushings in the rear suspension replaced with poly about 4 years ago ..... no squeaking to date.
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Old 07-09-2019, 11:38 PM
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AudioObsessions
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Originally Posted by Mr. Peabody View Post
I had all of the bushings in the rear suspension replaced with poly about 4 years ago ..... no squeaking to date.
It's funny because it only does it for the first minute or so. By the time I make it to the end of the block and turn around and come back and I'm pulling back into my garage I no longer hear it. So I'm assuming it's just doing it because it's been sitting there for a few days and because the bushings are new. I'm hoping once I get it out on the road and drive it back and forth to work a couple of times that I will no longer hear the sound.
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Old 07-10-2019, 12:17 AM
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Hopefully youre installation did not place the bushings in a bind.

Never hurts to use a few shots of silicone spray to those points that might be suspect.

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Old 07-10-2019, 08:09 AM
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81c3
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Did you tighten the bolts with the suspension parts at ride height? IOW, not hanging, but supported with a jack/jack stand to simulate ride height.... I think thats in the FSM
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Old 07-10-2019, 08:50 AM
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MatthewMiller
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Originally Posted by 81c3 View Post
Did you tighten the bolts with the suspension parts at ride height? IOW, not hanging, but supported with a jack/jack stand to simulate ride height.... I think thats in the FSM
That is important for the stock rubber bushings, in which the rubber is bonded to the inner and outer sleeves. However, for poly bushings it doesn't matter because the inner sleeves are not bonded to the bushing material. They have zero torsional preload at any point of rotation.

Last edited by MatthewMiller; 07-10-2019 at 08:50 AM.
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Old 07-10-2019, 01:05 PM
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mtwoolford
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when I install polys I grease everything, the bushings, the shells they go into, the sleeves that go inside the bushings, the bolts that go inside the sleeves, the brackets on the body that the whole assembly goes into, everything. no squeaks

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Old 07-10-2019, 09:17 PM
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jpipx
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Replaced all of the bushings in my 95 coupe couple of years ago, no squeaking to date. What brand did you use?
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Old 07-10-2019, 09:25 PM
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AudioObsessions
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Originally Posted by jpipx View Post
Replaced all of the bushings in my 95 coupe couple of years ago, no squeaking to date. What brand did you use?
I used Prothane bushings. Like I said, it has not seen any road time yet, I'm hoping things just need to settle in.
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Old 07-10-2019, 09:59 PM
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81c3
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Originally Posted by MatthewMiller View Post
That is important for the stock rubber bushings, in which the rubber is bonded to the inner and outer sleeves. However, for poly bushings it doesn't matter because the inner sleeves are not bonded to the bushing material. They have zero torsional preload at any point of rotation.
Yea, I did it anyway.... just being cautious I suppose... no squeaks at all....
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Old 07-11-2019, 01:33 AM
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zachaeous
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I replaced the bushings in my 84 with Poly bushings. I have had no squeaks. I also lubed all parts above what was provided with the kits.
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Old 07-11-2019, 01:47 PM
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Default Bushings

I to used prothane bushings replaced every bushing front and rear no squeaks yet, the ZR 1 guy in addison Illinois told me Last week that they start getting noisy at about 7,000 miles. Also a tech rep at prothane informed me to tighten front bushings at ride height, which I did. Only thing I hate is the harsh ride down semi rough roads.
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