Bushes Dont Last - Poly Or Better Rubber/ Genuine?
Posted 18 August 2012 - 01:47 PM
Now the MoT is up we checked and most of the rubbers have perished and need replacing!
I know they dont last forever but we dont want to be stripping the car down every two years, to be fair most of the itmes were cheap.
So what to you use? Uprated rubber? Which makes actually last? Unipart? Poly?
Pros and cons of poly?
Any help advice or experience would be much appreciated.
Posted 18 August 2012 - 01:54 PM
And if you are thinking of buying Polybushes, ask yourself whether you are doing it for a specific reason or whether you've just read "they're better". Unless they're a decent brand, don't bother.
Posted 18 August 2012 - 02:26 PM
The poly subframe mounts currently available are badly designed and probably unsafe. They use the material in a way that it should not be used. An all solid subframe mount kit is best for handling anyway.
So what does that leave? Lower arms, maybe, but I have severe reservations about the life of poly, as it does not deform in torsional shear like rubber, but actually rotates on the pin, which is not a good bearing surface.
I used to get upwards of 100k miles from standard rubbers, which were Unipart at the time, although the top engine steady did not last nearly as long.
Posted 18 August 2012 - 02:37 PM
Posted 18 August 2012 - 03:39 PM
for the bottom arm the mprated minispares bushes are also worth a try.
Posted 18 August 2012 - 06:39 PM
So forget the poly and use unipart rubbers.
Is there any other makes that are recomended if unipart dont have some parts?
Edited by richw911, 18 August 2012 - 07:26 PM.
Posted 19 August 2012 - 09:15 PM
I always mount the front sub-frames with solid metal mountings and never use the poly ones.
For the steering rack gaiter again I use the original type from Mini Spares.
The best rule is to use parts of the best quality and the original type.
I hope this helps.
Posted 19 August 2012 - 10:05 PM
Edited by BritishRacingGreen, 19 August 2012 - 10:06 PM.
Posted 19 August 2012 - 10:13 PM
Posted 20 August 2012 - 05:14 PM
But most rubber parts now seam to disintegrate within a few months. The engine steady bushes on one of my project minis were perished within less than a year and had to be replaced. But the were fitted new and the mini hadn't even been out of the garage or driven in that time.
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