MOT Fail - Lower Joints - AGAIN!! Press?

Technical questions and answers about the Mazda Bongo

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corrour
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Re: MOT Fail - Lower Joints - AGAIN!! Press?

Post by corrour » Mon Aug 05, 2013 10:21 pm

Bit the bullet last time and put genuine wishbones on after flea bay ball joints failed after a year.
I would rather be skint n on the road
Than have the money n be in the ditch..............
I would walk 500 miles.
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The_Gordons
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Re: MOT Fail - Lower Joints - AGAIN!! Press?

Post by The_Gordons » Tue Aug 06, 2013 8:19 am

We fitted replacement lower ball joints from a reputable source (not ebay) and the rubbers went in less than a year and the joints became loose. As we didn't have time for the Bongo to be off the road we purchased the complete Mazda genuine wishbones and wish we had done this the first time around.
Bongo replaced by Wellhouse Terrier
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Driver+Passengers
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Re: MOT Fail - Lower Joints - AGAIN!! Press?

Post by Driver+Passengers » Tue Aug 06, 2013 4:41 pm

My experience was having brand new rubbers going within weeks (seller A, product X) - these would have allowed dirt ingress very quickly which would quite easily cause the joint to fail within the first year.

The solution for me was to fit aftermarket replacement rubber boots provided by the supplier at no cost, and in my opinion far better suited to compression within the limited space between wishbone and knuckle - there is NO WAY the particular rubbers that came with the my replacement ball joints were supposed to compress the way they did.

So either I have an oversized taper in the knuckle or something, or the shape of boot on the supplied ball joint was incorrect for the application.

It makes me wonder whether, for many of the <1year ball joint failures, "it's all in the boot"...??

Picture below - rubber after two weeks and a couple of hundred miles...
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Just for the sake of illustration (no relationship to the sellers, parts, quality, etc...)
- style of boot that works for me... here
- style of boot that did not work for me... here

Further caveat - I've picked those two links on appearance/profile alone. I accept there may be differences despite appearances, that not all parts are equal, etc... Folk do use many sellers for replacement ball joints on existing wishbones and they can last for years.

It does make we wonder, though. If an incorrect boot is overstressed from day one, the symptom could well be a short life, as many people do experience. It may not be simply down to an inherently lesser quality part, just the boot on top of it. That said, I thoroughly approve the use of metal bandsaws for comparative testing! 8)

(Sorry to hijack the thread - good luck with yours!)
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ThisIsTheSea
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Re: MOT Fail - Lower Joints - AGAIN!! Press?

Post by ThisIsTheSea » Tue Aug 06, 2013 9:09 pm

Mine failed on the driver's side joint having play in it but boot had no holes - but perished :? And passenger side had split boot with holes, but no play. :? :?
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Re: MOT Fail - Lower Joints - AGAIN!! Press?

Post by ThisIsTheSea » Wed Aug 07, 2013 6:30 pm

Right, all done! New wishbones, drop links and track rod end boots. Partial MOT retest is booked for tomorrow afternoon. Fingers crossed that it now passes! [-o<

New Mazda wishbones and Meyle HD drop links.

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New boots for the track rod ends.

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Here is an old eBay drop link that had been on for just 4 months. You can see the holes.

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And one of the eBay lower suspension joints that lasted barely 12 months. I utterly wrecked the boot getting the joint to separate, but you can see the rust inside the joint, and it flops around quite loosely.

Image

The maker?

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