poly bushings

old guys rule · Feb 15, 2019

I bushed everything in my suspension except shocks with poly for handling and the car sat for a few years while I was otherwise occupied. Now I find almost all of them disintegrating. Now I'm not sure if I should do it again or go back to rubber. Bushings were from PST,Firm Feel, and Addco, so problem is not likely to be a bad batch. Anyone else run into this?

FrnkNsteen · Feb 15, 2019

I have not seen that, or had experience with poly bushings breaking down like that, mainly because I don't see the benefit of poly bushings on a street car and have always gone rubber.

I can see the advantages of poly on race vehicles, due to them being so much firmer, but race vehicles usually get regular maintenance and those kinds of things are regularly inspected and replaced as needed. On the street cars I have ridden in that have poly bushings, they have always felt more stiff and feel every bump. Not what I want for a street car that only occasionally gets driven hard.

Lee Robinson · Feb 15, 2019

FrnkNsteen said:
I have not seen that, or had experience with poly bushings breaking down like that, mainly because I don't see the benefit of poly bushings on a street car and have always gone rubber.

I can see the advantages of poly on race vehicles, due to them being so much firmer, but race vehicles usually get regular maintenance and those kinds of things are regularly inspected and replaced as needed. On the street cars I have ridden in that have poly bushings, they have always felt more stiff and feel every bump. Not what I want for a street car that only occasionally gets driven hard.

Did you use silicone grease on the poly bushings? Regular chassis grease
used on polyurethane will make them deteriorate.

Dibbons · Feb 15, 2019

Just read an article at www.suspension.com/blog/rubber that claimed poly will last the lifetime of the vehicle, only needing to be lubricated every five years. i don't know about that.

slepr1 · Feb 15, 2019

I have almost all poly bushings for 20 years now with no maintainance. I didn't know they need to be greased after initial install. I better get on that.

wagonman · Feb 15, 2019

I have Energy Suspension on the Chevelle for well over 10 years. On the Road Runner for 5 and now on the Duster. Never ran into the problem you have.

PST · Feb 15, 2019

Which bushings are you having a problem with? I would not image it would be a bad batch as control arm bushings are not made at the same time a strut rod bushings or end links. It seem that all have failed. Some more information and pictures would help.

Thanks
James From
PST Marketing

old guys rule · Feb 16, 2019

PST said:
Which bushings are you having a problem with? I would not image it would be a bad batch as control arm bushings are not made at the same time a strut rod bushings or end links. It seem that all have failed. Some more information and pictures would help.

Thanks
James From
PST Marketing

will get back to you. thanx, Dave

poly bushings

old guys rule

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FrnkNsteen

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Lee Robinson

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Dibbons

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slepr1

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wagonman

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PST

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old guys rule

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