Rear Shock Absorber Bushes Poly?

jonah said:

Thanks for responses. Getting confused now, just contacted supplier and they’re advising, due to make up of poly bushes there is no need for a metal sleeve to be fitted???

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jonah said:

Thanks for responses. Getting confused now, just contacted supplier and they’re advising, due to make up of poly bushes there is no need for a metal sleeve to be fitted???

Click to expand...

jonah said:

Hi All,

Bought a set of Brtpart Poly Bushes a while back and just about to start to change Rear Shocks on my Puma 110. Opened box and the Poly Bush Upper come in 2 halves perfect for fitting, once I get rubber ones off shocks. Question is, the bag with the Poly bushes in(NRC5593PY - black) doesn’t have metal collar like the rubber ones I intend to remove. Is this correct and is it due to the poly bushes being stronger, so don’t need metal centre collar/core?

Thanks in advance.

Jonah

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v8250 said:

This is nonsense. A bush, whether rubber or poly should be sleeved in this application where there's a component with arc of movement through the centreline; unless it's for short use only. If not, the primary component directly wears out the bush, as opposed to the inner sleeve.The sleeve is there to 1. provide central mechanical support to the bush, 2. keep the bush parallel in relation to its function, 3. act as a sacrificial part between primary metal component and bush :. enabling bush longevity. There's a reason why poly bushes have a poor reputation...it's because most are crap and produced for the bling market. There are only a few manufacturers out there that produce carefully designed/high quality components, i.e. SuperPro, Whiteline, PowerFlex...

https://www.superproeurope.com/products.cfm?vehicleid=7519
https://www.powerflexsuspensionbush...r-land-rover-defender-2002---2016-89890-p.asp

Personally, I'd send back the Britpart and buy SuperPro. Upon installation be sure to use good amounts of grease to all parts.

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dag019 said:

We are talking about shock bushes, specifically the rear? The oem rubber bushes are not sleeved, the bottom just fits over the shock spike and the top is egg timer shaped and fits over the shock bracket I cannot see how changing to polly would be any different.

Also if they were sleeved in this instance the sleeve would just rust onto the bottom of the shock or the mounting bracket meaning it was not possible to remove without damage to these parts. regardless of how much grease is used in assembly i seem to always have to cut off at least one of the bolts on a sleeved bush weather poly or oem. My understanding (possible incorrect) was the sleeves were for when a bush was under compression and prevented over distortion of the bushing (e.g. lower radius arms, series leaf springs etc)?

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