FYI. removing ball joints in Heidts A arms - Hot Rod Forum : Hotrodders Bulletin Board
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Old 11-07-2007, 08:24 AM
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FYI. Removing ball joints in Heidts A arms

I had the opportunity to remove a set of ball joints from a pair of Heidts "economy" upper control arms. These are the Moog K772 ball joint for a Chrysler..(Some apps include 65-73 dodge and chrysler and 80 monaco) They are usually identified by a somewhat square shaped top.

These ball joints are designed to be installed by threading them in, and letting the threads on the outside of the ball joint "cut" their own threads..(displace metal would be a better term)....but Heidts installs them with a press.


This in itself is not the problem, as they are very tight and would never fail because of the installation..


BUT!! Do not try to remove them by unscrewing them. (factory manual for the cars this balljoint is used in says to unscrew this type of balljoint), Heidts had no note about replacement procedure with the a arm set.

I did try to remove the balljoint and galled the dog crap out of the bore in the upper control arm, requiring it's replacement. By the time it felt like it was all crunchy it was too late. Trying to screw or press a new balljoint in didn't work as the bore was too messed up.


Upon calling Heidts we find that they recommend pressing them out. They R&R real easy with a balljoint press.

Many of the companies making MII front ends use this ball joint in their fabricated a arms...(stockers use bolt ins). I know for a fact that TCI, and Fatman uses them, and thread them in as intended..
A socket is available for this type of balljoint, and if they are initially installed properly, they will unscrew fairly easily.


Later, mikey

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Old 11-07-2007, 02:17 PM
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Quote:
Originally Posted by powerrodsmike
A socket is available for this type of balljoint, and if they are initially installed properly, they will unscrew fairly easily.
Another reason I prefer a straight axle in a early car ...

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Old 11-07-2007, 02:32 PM
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Originally Posted by Deuce
Another reason I prefer a straight axle in a early car ...

Mikey's current victim is a 47 Ford truck..

Daily driver for the owner.

It is getting new upper and lower control arms that will use the rubber bushings..The urethane ones that came with the fatman kit that was originally installed wore out pretty badly after only 10K miles..and they were greased several times throughout that period..

Later, mikey
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Old 11-08-2007, 12:31 PM
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Mikey,
Do you know if this removal procedure also applies to Heidt's MII tubular a-arms.
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Old 11-08-2007, 12:45 PM
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I think I would call Heidts and ask about your specific arm,, let them know the date you bought it too, as they may have changed assembly procedures along the way..

It would save alot of grief to know..

You can press out the ones that are screwed in, (I've done that too) but be aware that the factory manual as well as the instructions that come with the Moog u joint say that if you can't get your new ball joint to tighten up to 125 foot pounds when installed you will need to get a new a arm. I lucked out, the ones I pressed out, screwed back in. Those were in some stock chrysler arms.

Later, mikey
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Old 11-11-2007, 09:41 AM
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Makes me wonder about my TCI's. But that's down the road a lot of miles, I hope. TCI is sometimes tough to get good answers out of without a lot of prodding.

Dave
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