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08-09-2014, 11:09 PM | #1 |
Registered User
Join Date: May 2008
Location: Waukesha, WI
Posts: 904
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Poly bushings failing?
What causes poly bushings to fail? Heat? Age? Miles? I have been tracking down a wandering issue on my 89 Jimmy and swapped out the front spring bushings and all the sway bar bushings. They were all blown out like this.
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70 stepside 76 blazer 86 Silverado 20 Max Trailering 6.2 Crew 71 Nova SS My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=363634 |
08-09-2014, 11:47 PM | #2 |
Registered User
Join Date: Sep 2007
Location: Wichita Falls, Texas
Posts: 459
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Re: Poly bushings failing?
Poly is really too stiff for a leaf spring bushing. The springs need to twist more than polys like. They are perfect for rotating in a single plane, but any more than that and they bind things up.
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08-15-2014, 06:49 AM | #3 |
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Join Date: Jul 2013
Location: Portland, Maine
Posts: 219
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Re: Poly bushings failing?
Yeah, despite the advertising hype poly is not a good material for all bushings. I used to go through two sets of lower control arm bushings a summer on an old turbo car I had until I build arms with spherical ends. Poly needs to fit perfectly and only move in one plane as diamond mentioned. There is a reason many companies stopped using it for shock/air ride bushing too. It just doesn't hold up. Ridetech won't even sell you replacement bushings for the old shockwaves now and recomend changing to sphericals.
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Daily Driver '66 C10 Fleetside Short Bed - LS swap - 4L80E - Accuair eLevel |
08-22-2014, 02:10 PM | #4 |
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Join Date: Apr 2005
Location: Pensacola, FL
Posts: 17,854
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Re: Poly bushings failing?
How old are they?
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Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3 |
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