XK / XKR ( X150 ) 2006 - 2014

Polyurethane versus rubber ball joint dust cover

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Old Sep 13, 2025 | 04:01 PM
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Default Polyurethane versus rubber ball joint dust cover

I've been having a somewhat difficult time trying to obtain a pair of replacement boots for my upper control arms for my 2010 XK with 20,000 miles. There is no play whatsoever so the ball joints are solid. Polyboots (polyurethane from Bulgaria) is not big these days on sending at this time small orders, besides having prohibitive shipping charges. I am willing to pay the charges but I don't think they will send the small order out to retail customers. I have found one or two small vendors on ebay (probably made in China) with the specs that were recommended from previous threads on this forum. The specs of 13-30-23mm is the closest I can come to 13-30-22mm however they are rubber. Does anyone think it's a waste to change the perished boots with rubber? I just don't want them tearing in a few years after the effort of getting them installed. I would assume anything is better than the crap Jaguar used for the OEM. Thanks all.
 

Last edited by bocatrip; Sep 13, 2025 at 04:06 PM.
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Old Sep 13, 2025 | 08:27 PM
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Anyone?
 
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Old Sep 13, 2025 | 08:37 PM
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Originally Posted by bocatrip
Anyone?
Boca, I got nuthin.
I did ask my Jag only indie guy, but it was about the stiffer poly bushes. He said don’t bother.
 
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Old Sep 13, 2025 | 10:46 PM
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Originally Posted by Circumnavigator
Boca, I got nuthin.
I did ask my Jag only indie guy, but it was about the stiffer poly bushes. He said don’t bother.
Don’t bother as “It doesn’t matter”? Rubber or Poly boot covers? Doesn’t make much difference?
 
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Old Sep 13, 2025 | 10:50 PM
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Originally Posted by bocatrip
Don’t bother as “It doesn’t matter”? Rubber or Poly? Doesn’t make much difference?
For bushings I believe the difference was that poly gave a much stiffer ride. Better for tracking and curvy mountain roads.
If you lean towards the soft comfy GT side, as I do, stick with rubber.
We didn’t discuss boots. I’d think they would be more durable. But more stiff, if that matters for basically a dust and debris cover.
 
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Old Sep 14, 2025 | 08:13 AM
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Originally Posted by bocatrip
I've been having a somewhat difficult time trying to obtain a pair of replacement boots for my upper control arms for my 2010 XK with 20,000 miles. There is no play whatsoever so the ball joints are solid. Polyboots (polyurethane from Bulgaria) is not big these days on sending at this time small orders, besides having prohibitive shipping charges. I am willing to pay the charges but I don't think they will send the small order out to retail customers. I have found one or two small vendors on ebay (probably made in China) with the specs that were recommended from previous threads on this forum. The specs of 13-30-23mm is the closest I can come to 13-30-22mm however they are rubber. Does anyone think it's a waste to change the perished boots with rubber? I just don't want them tearing in a few years after the effort of getting them installed. I would assume anything is better than the crap Jaguar used for the OEM. Thanks all.
@bocatrip What you wrote doesn't make sense to me. You're asking about boots and described "... specs of 13-30-23mm is the closest I can come to 13-30-22mm however they are rubber ...". Those specs appear to be for control arm bushings.

Jaguar does not offer control arm bushings because they don't repair worn parts; they only replace them with new parts. A new OEM Jaguar control arm assembly includes a new rubber bushing.

T

That's the price for one. You'll need two, right and left. That's outrageously expensive.compared to the price of a pair on eBay:



At the risk of sounding like a broken record, I'll say it again, Sam: Your car, your money, and your choice. Why pay more?

Stuart
 
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Old Sep 14, 2025 | 08:26 AM
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Bought these on Amazon:

RACOONA 14PCS Ball Joint Boot,

 
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Old Sep 14, 2025 | 08:42 AM
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Originally Posted by Joe7Bros
Bought these on Amazon:

RACOONA 14PCS Ball Joint Boot,

Did they work? How many boots were you able to use from the kit?
 
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Old Sep 14, 2025 | 09:23 AM
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If you are truly talking about the protective boot only, you may be way overthinking this. Bushings are a different story.
 
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Old Sep 14, 2025 | 10:03 AM
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Upper ball joints, of the two boots, one is 1mm smaller, but worked fine. Those are the only 2 I used, but there are 2 that will fit the tie rod ends, if I remember correctly.
 
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Old Sep 14, 2025 | 10:44 AM
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Originally Posted by Joe7Bros
Upper ball joints, of the two boots, one is 1mm smaller, but worked fine. Those are the only 2 I used, but there are 2 that will fit the tie rod ends, if I remember correctly.
I was told those are not meant to be serviceable.
The aftermarket upper arms are so inexpensive, the effort to try and replace the bushing or outer boot isn’t worth it.
(although I’ll add that the bolts on either side of the shock and springs are a pain in the **** as well.)
 
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Old Sep 14, 2025 | 11:22 AM
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I am the OP of this thread. . Below is the link. GordoCatCar is the OP of that thread. You will see the specs recommended are 13-30-22mm. It is for the upper control arm boots for the ball joints. The cover "can" be replaced on it's own, even though Jaguar wants you to replace the entire arm as it comes that way from the factory. This is an old link, but very helpful ..I am not interested in the bushings...Just the boot for the ball joint. This link is very helpful and should be a sticky.

https://www.jaguarforums.com/forum/x...cement-227495/
 

Last edited by bocatrip; Sep 14, 2025 at 11:27 AM.
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Old Sep 14, 2025 | 01:03 PM
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Originally Posted by bocatrip
I am the OP of this thread. . Below is the link. GordoCatCar is the OP of that thread. You will see the specs recommended are 13-30-22mm. It is for the upper control arm boots for the ball joints. The cover "can" be replaced on it's own, even though Jaguar wants you to replace the entire arm as it comes that way from the factory. This is an old link, but very helpful ..I am not interested in the bushings...Just the boot for the ball joint. This link is very helpful and should be a sticky.

https://www.jaguarforums.com/forum/x...cement-227495/
Just read the whole thread then, for my needs, I found the specs for the other components boots:
Front lower control arm boots: (both)
19mmx31mmx30mm
Rear sway bar link boots:
13mm x 25mm x 22mm - double convolution
Upper control arms:
13mm x 30mm x 22mm
I searched far and wide.
Polyboots doesn’t seem to sell retail (can only add to cart and inquire). Would love to know if someone did and got a response.
Amazon sells 14pc boot packs. A couple had one that came close. But none of them matched any of the above.
For the upper front arm, they came close at
13-30-23/24.

https://a.co/d/ar0SS1e
1-2mm taller could work.

Energy suspension, Moog, Prothane, QA1 and Synergy had zero matches.
 

Last edited by Circumnavigator; Sep 14, 2025 at 01:04 PM.
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Old Sep 14, 2025 | 04:55 PM
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I have inquired and Polyboots does not want to sell to retail customers......Thus this thread comparing polyurethane boots to rubber. Of course the Polys should be superior, but since they are not available to retail customers,'ll probably have to go with the rubber boots of which getting the proper specs is also challenging but possible. For members who still have solid ball joints and other suspension components with the crappy perished factory boots, and don't want to replace the entire control arms etc, the boot route (if you are handy) can be a good way to save some bucks, especially on the front upper control arms.
 

Last edited by bocatrip; Sep 14, 2025 at 04:57 PM.
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Old Sep 14, 2025 | 06:09 PM
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Originally Posted by bocatrip
I have inquired and Polyboots does not want to sell to retail customers......Thus this thread comparing polyurethane boots to rubber. Of course the Polys should be superior, but since they are not available to retail customers,I'll probably have to go with the rubber boots of which getting the proper specs is also challenging but possible. For members who still have solid ball joints and other suspension components with the crappy perished factory boots, and don't want to replace the entire control arms etc, the boot route (if you are handy) can be a good way to save some bucks, especially on the front upper control arms.
Very cool. I was unable to locate any boots, even rubber, the exact size.
If you do locate them, please let us know. I'd much prefer to replace the boots than all the components + an alignment.
I'm sure others would as well.
 
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Old Sep 14, 2025 | 08:08 PM
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This just popped up on the local NZ Non public Jaguar Facebook page

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>
=AZWixujcKarKFyL9hQJLOHxLR_iP2E2p67gLEL5eraQ8tpO5b bEdXEeRuT-C29xy5NI_Lmu9iHeQ_lSZmmshfQ-BotH_tn9nhPZxEtqh7jRT951npiswZkmFSqHT0icJ9i-WFLxUF1YzcCZSJWUFXzNEIEWpbrWXiNb_6rETirv6DntICcPez qsy0N2KIi9j2pkTuTYjejNulS8asWGqSmi7&__tn__=-UC%2CP-R]Alexey Dashkin


=AZWixujcKarKFyL9hQJLOHxLR_iP2E2p67gLEL5eraQ8tpO5b bEdXEeRuT-C29xy5NI_Lmu9iHeQ_lSZmmshfQ-BotH_tn9nhPZxEtqh7jRT951npiswZkmFSqHT0icJ9i-WFLxUF1YzcCZSJWUFXzNEIEWpbrWXiNb_6rETirv6DntICcPez qsy0N2KIi9j2pkTuTYjejNulS8asWGqSmi7&__tn__=%2CO%2C P-R]ostSenprod4b2e76621Ptmfggm1e0hm1:ar 5000m 9ugSuMp30897 m59et 18t1 ·
Hello All. I drive a X350 JX 2006MY. As many of them, this car had most of the suspension dust coats split, or better to say completely annihilated ). Having many years of experience with cars and 3D printing, I created new dust-coats for must of my car's suspension joints using specific filament and printer settings. The printed parts are very durable and tolerate to grease/petrol. Rear lower arm bushings became a bit stiffer as the 2mm tick rubber boots folds inwards and created some sort of a soft bump-stop for relatively worn ball joints inside them (i.e. some sort of extending of the bushings lifespan). The boots are made so precisely for the joints, so, they sitting there even better, that the original ones. The parts are fitted to my own car for a moth and I drove it over 500km so far (weekend car), the boots are sitting there, no grease leaks, no other concerns. If anyone is interesting in 3D-printed dust coats for suspension joints or any other flexible or hard plastic printed parts - let me know, I'll print them for you.
I stay in Christchurch, if anyone wants to meet in person and see, how the dust coats are working on a live car - we can meet in person.
P.S. Sorry for the mess on pictures, had no time to tidy it up around )))
Many thanks.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>


Perhaps you could get in touch?
 

Last edited by gmuirnz; Sep 15, 2025 at 01:58 PM. Reason: Clarification
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Old Sep 28, 2025 | 12:12 PM
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Default soufflets de triangles supérieurs

Originally Posted by Circumnavigator
Just read the whole thread then, for my needs, I found the specs for the other components boots:
Front lower control arm boots: (both)
19mmx31mmx30mm
Rear sway bar link boots:
13mm x 25mm x 22mm - double convolution
Upper control arms:
13mm x 30mm x 22mm
I searched far and wide.
Polyboots doesn’t seem to sell retail (can only add to cart and inquire). Would love to know if someone did and got a response.
Amazon sells 14pc boot packs. A couple had one that came close. But none of them matched any of the above.
For the upper front arm, they came close at
13-30-23/24.

https://a.co/d/ar0SS1e
1-2mm taller could work.

Energy suspension, Moog, Prothane, QA1 and Synergy had zero matches.
Pour info, achetés chez OSCARO
Capuchon de fermeture/de protection -A.B.S. ALL BRAKE SYSTEMS BV. - 279025

Quantité : 4
3.60€
Frais de port
5.99€
Total TTC
9.59€







 
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Old Sep 28, 2025 | 12:17 PM
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Je les ai montés moi même en consultant le tuto suivant: https://www.xkr2007.com/technique.php

Bon montage
Daniel
 
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