Poly Spring Bolt Cushion Disintegrated
Thread Starter
Burning Brakes
Joined: Oct 2006
Posts: 1,006
Likes: 28
From: Lutz Florida
Poly Spring Bolt Cushion Disintegrated
About three years ago I replaced the spring bolts with a stock length polyurethane kit. I can't remember where I got it from but I think it was Ecklers. I looked under the car this afternoon and the lower cushion on the drivers side had completely disintegrated. Both the upper and lower washer were still there. There was no sign of any other damage of any kind. The spring still looked OK. The upper cushion still looks ok, and so do the upper and lower cushions on the passenger side. I am beginning to not be a fan of polyurethane anything. I think I will replace all four with rubber. Is this what happens when polyurethane goes bad, it just disintegrates in pieces? Or could something else chemical have caused it like overspray from brake cleaner or something? Any ideas?
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
I've never seen or heard of a poly bushing completely crumbling away. It could have been a defective part or something could have caused it to be ruined. Every one I've ever used has looked new even after many miles of use.
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
Thread Starter
Burning Brakes
Joined: Oct 2006
Posts: 1,006
Likes: 28
From: Lutz Florida
I know, this was pretty strange to me too. I would think if they were defective all four of them would have Deteriorated the same way. the other three look fine. I got some OEM rubber cushions to replace them with so I will look a little closer tonight. There must have been some type of defect in the one cushion from the start. That's all I can think of.
Thanks
Thanks
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Burning Brakes
Joined: Oct 2006
Posts: 1,006
Likes: 28
From: Lutz Florida
Replaced them tonight. Other three polyurethane cushions were A-ok. Nothing wrong with the spring or anything else in the rear suspension. I guess it must have just been a defective cushion. Maybe the other three weren't from the same batch of urethane as the one that failed. Wierd. At least they are easy to replace.