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Open Track Racing
Coilovers and Ball joint problems?
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<blockquote data-quote="sleepless" data-source="post: 6414411" data-attributes="member: 50551"><p>Well, after talking to MM, I find this all a bit unsettling.</p><p></p><p>First, the joints popped out the bottom, the same way they are pressed in.</p><p></p><p>MM says that unless you build up some material in the control arm's hole before pressing in the new ball joints, that having them pop out is a fairly common problem with replacement ball joints.</p><p></p><p>As far as I can tell, this is mainly an issue with coil overs since in the stock spring configuration, there is almost no force applied on the ball joint in the "push it out the bottom direction", while with the coil over setup, since the spring is now connected to the carrier and the sway bar is still connected to the lower control arm, in hard cornering the force of the sway bar and the force of the spring conspire to pull the controll arm up and off the ball joint. So, with a stock suspension, you can easily get a way with replacing the ball joint just by simply pressing it back into the control arm. But, with the coilover setup, you have to make it a tighter fit. I know some people also tack weld the ball joint to the control arm.</p><p></p><p>Ultimately, a control arm with threaded ball joints would be much much more robust and safer; it was not fun having these joints pop out in a 60MPH corner!</p><p></p><p>The most unsettling thing to me is that you really can't be certain that the ball joint is pressed in tight enough; so it is like playing Russian Roulette...</p></blockquote><p></p>
[QUOTE="sleepless, post: 6414411, member: 50551"] Well, after talking to MM, I find this all a bit unsettling. First, the joints popped out the bottom, the same way they are pressed in. MM says that unless you build up some material in the control arm's hole before pressing in the new ball joints, that having them pop out is a fairly common problem with replacement ball joints. As far as I can tell, this is mainly an issue with coil overs since in the stock spring configuration, there is almost no force applied on the ball joint in the "push it out the bottom direction", while with the coil over setup, since the spring is now connected to the carrier and the sway bar is still connected to the lower control arm, in hard cornering the force of the sway bar and the force of the spring conspire to pull the controll arm up and off the ball joint. So, with a stock suspension, you can easily get a way with replacing the ball joint just by simply pressing it back into the control arm. But, with the coilover setup, you have to make it a tighter fit. I know some people also tack weld the ball joint to the control arm. Ultimately, a control arm with threaded ball joints would be much much more robust and safer; it was not fun having these joints pop out in a 60MPH corner! The most unsettling thing to me is that you really can't be certain that the ball joint is pressed in tight enough; so it is like playing Russian Roulette... [/QUOTE]
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Coilovers and Ball joint problems?
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