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View Full Version : Replacing Front Lower Control Arms


bbarbulo
07-29-2004, 10:37 AM
So, you have front end clunk or just wanna freshen up your ride? I suspected my ball joints, and upon inspection found them tight, but the boots were cracked up. Meaning - they were gonna go bad in the next few months anyways, and the arm-to-crade bushings were cracked and crusty lookin. So, I picked up new parts from NAPA made by Spicer (of Spicer-Dana). The original OEMs were made by TRW. I paid $115 each, regular price was $135 each. Ball joints are KEY to safe operation, as when the ball joint breaks, the wheel will swivel around the strut in any dirction it wants, and depending on the speed could go right into the cabin and take out your legs. I've heard of this happening before. So, given that, the after tax total of $267 that I paid for it was a steal. Nearly 12 year old ball joints are nothing to neglect.

Now, the how-to part of this... pix0rs will be up a little later when I DL them from my camera.

1. loosen lugs and jack up vehicle - support it on jack stands (you'll be yankin off big bolts with lots of torque, you don't wanna rely on a jack).
2. remove wheels
3. remove splash shields on both sides
4. remove the cotter pin on the balljoint-to-steering knuckle
5. remove the castle nut on the balljoint-to-steering knuckle 18mm
6. use a hammer to hit the part of the steering knuckle just under the castle nut. This should make the ball joint pop out. If not, use a ball joint fork cuz you're replacing them anyways.
7. use a pry bar to seperate the steering knuckle from the lower control arm
8. remove the 18 mm nut on the lower control arm-to-cradle bolt... you use a 15 mm socket to stop it from spinning.
9. remove the 24 mm nut on the sway bar
10. I don't know if this is entirely necessary, but I removed the whole sway bar using a 15 mm socket. careful, this can change your caster!!! since the sway bar also acts as the ... lateral locator for the lower control arm. Mark the d-brackets. This is also a good time for the energy suspension sway bar bushings. I already had mine, so I just greased them.
11. now the sway bar and the lower control arms are out! you just slide the control arms off the sway bar, and install new ones. Use plenty of chassis grease on the bushings... you don't want creaks and squeaks to creep in.
12. reverse the removal... I don't know if this is the easiest way to do it, but I did it like this... put the LCA (lower control arms) onto the sway bar with liberal greasing.
13. put the sway bar back in place loosely.
14. put the LCAs into the cradle and try to get the bolts in as best as you can... some LIGHT hammering may help
15. once you have the LCA to cradle bolts in, you can tighten the sway bar and adjust the caster to where you marked it before.
16. tighten the LCA to cradle bolts a LITTLE, but not all the way
17. manipulate the steering knuckle to get over the ball joints... pry bar helps here.
18. tighten the castle nut and put the cotter pin back in
19. tighten all the rest of your bolts
20. put your wheels on and torque them... enjoy!

notes:
I used blue loctite on the sway bar to cradle bolts
I had a hell of a time getting the LCA to cradle bolts in there - it's really not easy
Be careful that the bottom of the steering knuckle doesn't accidentally cut through your ball joint boot. Luckily mine was pretty tough, but I was quite worried there when I saw how it was sitting.
Get an alignment after
If your axle seals are leaking, now is the time to do them - plan ahead.
The castle nut does NOT have enough clearance to come out OR go in when the ball joint is up in the steering knuckle all the way. You have to get some thread through the hole, then start the nut, and then you can tighten it with a wrench.

I had to use mostly wrenches cuz of the tight space in there... I only used on socket, which was the 15mm.... I used a 24 mm wrench cuz I didn't have a socket large enough.

I also did a break job while in there... and I plan to bleed the brakes tonight, and do the rear brakes later next week. There will also be a spring swap back to stock springs in there somewhere... anyone interested in those articles?? I may also do some rear susp work, like some bushings... anyone wanna see those articles? Suggestions to make my articles better also welcome!

Bruno

Luke
07-29-2004, 01:35 PM
Bruno
Use plenty of chassis grease on the bushings
I had thought that grease causes the bushing to crack...but, with your comments above, I'm assuming that there is actually a "chassis" grease ??:dizzy:
since the sway bar also acts as the ... lateral locator for the lower control arm. Mark the d-brackets.
Sorry........"d-brackets" ???? :zzz:
I had to use mostly wrenches cuz of the tight space in there.
I have the six point sockets, however, am having considerable :no: difficulty in finding six point closed wrenches in the 15, 18, & 24 mm sizes. I did pick up an electric torque wrench to assist, though.

In closing, remember, I don't always take my brain pills........

bbarbulo
07-29-2004, 02:55 PM
chassis grease is really hardcore wheel bearing grease. I use it because 1. really resistant to water 2. I have it at my house. Over the REALLY long term, petroleum based grease like this will tend to damage rubber, this is true. You really SHOULD be using lithium grease, or graphite grease. Lithium grease is lightweight white grease that's superb for rubber bushings. However, I'm sure this car will somehow end one way or another before the second set of control arms wears out.

d-brackets... I'm not sure if Saturn ppl use this term... but Honda ppl do. They are the brackets that hold the sway bar to the subframe with 2 15mm bolts. They go overtop of the sway bar bushings... they are located ... under the inside of the headlight, just a bit closer to the engine, on the subframe. You really can't miss them. There are only 4 points on the sway bar... one at each control arm, and the two d brackets. (wait for pics, my description is hella confuzing)

I did not use a 6 point closed wrench.... I used an open end Snap-On wrench as I did not have the correct sized socket. That's why I'm telling you guys, so that you can prepare yourselves. I would NOT have attempted this with anything lesser than a Snap-On. The electric impact wrench will be of no use since space is so tight. Might as well return it and invest in a 24 mm socket :p For the 15 mm I was able to use the socket all the way (for all the 15 mm bolts), the 18 mm on the castle nut is a TIGHT fit, and the 18 mm on the LCA to cradle nut is also a squeeze. No way you're getting sockets in there (I even have the low profile pass through sockets and drivers). The 24 mm is easily accessible with a nice 1/2 inch drive 24 mm socket and breaker bar... but surprisingly enough, with some help from WD40, it's not so bad.

It should all be clear once I put the pictures up...

Oooops, I just realized my spelling error in the first post... not break job... brake job idiot :ugh: pardon my ignorance...

Luke
07-29-2004, 03:39 PM
chassis grease is really hardcore wheel bearing grease

Super, I have it & that is what I use on my bearings.

They are the brackets that hold the sway bar to the subframe with 2 15mm bolts. OK, and I have new bushings for that.
The electric impact wrench will be of no use since space is so tight. Might as well return it and invest in a 24 mm socket
I wanted the impact wrench anyway, and already have two 24mm sockets.

Thank you Bruno..

bbarbulo
07-29-2004, 04:30 PM
glad to help Luke, pix should be up tonight.

bbarbulo
07-29-2004, 11:56 PM
http://img.photobucket.com/albums/v320/bbarbulo/Saturn1993/IMG_0460.jpg

starting point

http://img.photobucket.com/albums/v320/bbarbulo/Saturn1993/IMG_0461.jpg

24 mm nut on the sway bar

http://img.photobucket.com/albums/v320/bbarbulo/Saturn1993/IMG_0462.jpg

d-bracket on the sway bar

bbarbulo
07-29-2004, 11:58 PM
http://img.photobucket.com/albums/v320/bbarbulo/Saturn1993/IMG_0469.jpg

sway bar down

http://img.photobucket.com/albums/v320/bbarbulo/Saturn1993/IMG_0468.jpg

sans control arm

http://img.photobucket.com/albums/v320/bbarbulo/Saturn1993/IMG_0470.jpg

shiny new part

bbarbulo
07-29-2004, 11:59 PM
http://img.photobucket.com/albums/v320/bbarbulo/Saturn1993/IMG_0473.jpg

closeup of the castle nut

there, hope those at least give you an idea of what's involved... holla at me if you got questions!

Luke
07-30-2004, 10:12 AM
Bruno

Your pictures are invaluable
Even though, I've check out the area a number of times with my repeated under charrige checking. BTW, when you say "mark the d-bracket", I'm assuming that you mean to mark where the two bushing brackets are sitting on the bar, prior to taking them off.

As a side note, I noticed that the new control arm's nut (on both) is really tight. I can't even move it. May I assume that they start out that tight ?? For one of them is at an angle which will necessitate adjusting to be able to get it straight up, into the cradle.

bbarbulo
08-04-2004, 09:01 AM
Hey Luke, sorry for my lack of responsiveness... I was out of town for the CDN long weekend. Again... sorry!

To answer your questions:

Mark the bushing bracket with respect to the subframe, as the bushing bracket bolt holes are actually slotted and can be moved either toward the front of the car or the rear. Moving the sway bar forward or backward will cause the caster AND toe to be out of range when you're done. So you wanna mark where the the bracket is with respect to the subframe. As for the sway bar, it will just fall into place in the bushings, so you do not have to mark the brackets with respect to the sway bar, though it can't hurt.

I'm not 100% sure I understand the second question... you mean to say you have a hard time starting the castle nut onto the balljoint? generally, I'd say that's a sign of poor craftsmanship from the manufacturer. Force it down at least once, then undo it, and try it again. I'm assuming that you are starting it square and true onto the thread. Use some WD40 to help. As for readjusting the position of the balljoint to help better fall into the steering knuckle, I started the old castle nut onto it, and I gently tapped it with the hammer to get it into position, as I could NOT move the balljoint by hand. Worked like a charm!! Any other questions, I'd be glad to assist.

Luke
08-04-2004, 09:27 AM
Bruno
I'm the first person that when asking questions, will wait and patiently, until the person to whom I've raised the inquiry, finds it convenient to respond. Simply put, it is the courtesy way of seeking responses from those who have the expertise..

Fm me
.......I noticed that the new control arm's nut (on both) is really tight.

Fm Bruno As for readjusting the position of the balljoint to help better fall into the steering knuckle, I started the old castle nut onto it, and I gently tapped it with the hammer to get it into position, as I could NOT move the balljoint by hand. Worked like a charm!!


That was exactly the concern I had. :grnjump:
In closing, not enough can be said about the picture submissions......


As a side note & Off Topic:
This project will have to wait, for yesterday, discovered that my radiator fan appears to have failed. In my driving home, upon activating the fan, via my switch (it also has a light on it when the switch is on), the fan did not come on (the light did). In testing, I replaced the relay with that of the horn (moving the fan relay over to the horn slots, with horn still functioning. I then inserted my code reader & went into "field test mode", resulting in fan still not activating. My final test, was to shut engine down, turn key on, and inserted my code reader == heard the click, but no fan activation. I sense I can now reasonably assume that it is the fan itself. :no: Unless, there is another test, of which I've not thought :?:

bbarbulo
08-04-2004, 09:38 AM
Bypass everything else, and just go straight from the battery to the fan terminals. If the fan fails to turn on, you've located your problem. If the fan does turn on, then you've saved yourself a couple hundred bucks. :) Quick and dirty check for the home mechanic, just cuz sometimes the wiring fails before the brushes. But given the age of it... I wouldn't be surprised if the brushes are done. If you are so inclined, the brushes aren't more than $5, and you can just replace those alone (though I have not done a fan motor personally), and maybe freshen the bearings inside with some grease or if they are noisy, have a machine shop press new bearings on. I don't know if you are up for rebuilding your fan motor though.

Luke
08-04-2004, 09:38 AM
Another note: did you get your pairs from Canada, for that is from where I had mine shipped.

bbarbulo
08-04-2004, 09:39 AM
yeah, I got mine from NAPA/UAP parts right here in Windsor, ON. In fact, the store is located right next to the Anchor factory, yes, the one that makes the Autozone replacement engine mounts :)

Luke
08-04-2004, 09:43 AM
Napa is not close, but others on this site have suggested AutoZone.

bbarbulo
08-04-2004, 10:20 AM
diff't places carry diff't manufacturers... just ask them who makes the parts, and if you hear familiar names like TRW, Moog, or Spicer, take it! :) It doesn't matter what store it comes from. I just picked up an idler pulley and lower tranny mount from NAPA, and I trust their parts are gonna be top notch. I've been looking for rear susp components, and I've found NOTHING! I guess I'll just throw in new Energy Suspension bushings and call it a day.

Luke
08-04-2004, 11:23 AM
Fm Bruno
I wouldn't be surprised if the brushes are done. If you are so inclined, the brushes aren't more than $5, and you can just replace those alone (though I have not done a fan motor personally), and maybe freshen the bearings inside with some grease or if they are noisy, have a machine shop press new bearings on. I don't know if you are up for rebuilding your fan motor though.

Point well made; I'll save the old unit and take up the challenge & use the results as a "back-up"