You can buy the rubber boots which usually spilt but not a seperate ball joint which in the past for me have been the issue. Your other options are second hand sombody here will be scrapping a pair for sure or seeing if Demon Tweeks have "universal" job for those building a kit car.Any idea where to purchase these separate from the wishbone arm? They're a piece of cake to remove/refit with a press tool and look like a fairly standard part, but I can't for the life of me find them for sale anywhere (without the wishbone attached)
Yep - done with the same c-press as used to remove the rubber bushes. Use the smallest sleeve on the upper side of the wishbone, and a flat plate/17mm socket on the lower side of the wishbone to remove. Use the smallest sleeve on the lower side and a flat plate on the upper side to pop 'em back in. Hold the press in the vice rather than the wishbone, as the wishbone weighs less! Takes ~30 seconds apiece.Are they really "that" easy to pop out with a press?
Have you had a go?
Totally - there isn't any vertical load on the upper balljoint. Vertical/bump loads go through the lower wishbone and the spring/damper. The only vertical load on the upper wishbone is from the upper wishbone bushes and the inertia of the upper wishbone itself if you think about it - and you can move that by hand so its minimal - which is why its just a pressed in part. (its actually *less* of a press fit than the rubber bushes...) Vertical force to deflect the rubber wishbone bushes is <0.5kN and I'd guess at about 5kN to press the thing out. In use the balljoint will only really ever see side-loads from braking/lateral loading on the tyre, and braking is dominant.Would you be 100% confident that after pressing in a new one, into a hole already enlarged slightly by the pressing in and removing of the previous joint, that it wouldn't let go on some big pot holes?
The circlip isn't there for "failure" of that balljoint on the RX7 or 929:Yep - but that's retained in case of failure with a circlip.
Wales-Cambridge-Boston-Cambridge-Wales-San Francisco-Wales-??Sheffield?? whatever that makes me!i take it you're from america then marko?
Tell me about it - *everything* is pricey over here...harbor frieght stuff's usually a bit pricey by the time it gets across to us
Exactly. Dab of loctite and they'd never go anywhere. (unless you heated them first to break the bond) Will let you know.I'm intrigued by your suggestions on the balljoints. looks good to me and assuming the balljoints are the same, the shoulder will make them captive in the wishbone even if they do unpress themselves, so a relatively safe failure.
We'll see! Need to find a 5 first (only have a bike at the minute, and doing some work on kid bro's 5) and a place to live in Sheffield.sheffield.....cool. you should get yourself to the next tech day at rodders', or the meet in leeds if you fancy venturing that far.
I'm always the square peg.sounds like you'll fit in well. challenging the status quo but in a well reasoned fashion
if you can get the ball joints for ?100 the pair tell us where..please.Trouble is it'd cost a "small fortune" to do and I doubt many would be interested. Say the wishbones are free (you always get straight ones for exchange). Sandblast/acid pickle/galv then chase the threads out with a tap would be 150 quid odd. Balljoints 100 quid the pair. Polybushes are at least 200. Lord only knows how much a new set of bolts is from Mazda. Probably IRO 200 quid. Would anybody pay 800 quid for a set of wishbones/polybushes?