Upper Control Arms
#1
Upper Control Arms
I have installed new upper control arm bushings on my Rallye 350, and I want to verify if I did this correctly. In the chassis manual it stated to:
Press the first bushing in until it bottoms on control arm.
Then Turn arm over and install the other new bushing in the same manner.
But then it states, Install the bushing loosely. What does that mean?
I also watched a cartape video on youtube about rebuilding the front end and they simply installed both bushings until they bottomed. I just want to confirm if the steel center sleeve on the bushings should be contacting the raised part of the control arm shaft. The shaft will rotate but it seems tight. See picture below:
Thanks,
Press the first bushing in until it bottoms on control arm.
Then Turn arm over and install the other new bushing in the same manner.
But then it states, Install the bushing loosely. What does that mean?
I also watched a cartape video on youtube about rebuilding the front end and they simply installed both bushings until they bottomed. I just want to confirm if the steel center sleeve on the bushings should be contacting the raised part of the control arm shaft. The shaft will rotate but it seems tight. See picture below:
Thanks,
#3
^^^This. The bushing outer shells should be pressed all the way into the control arms until they bottom. You do not, however, want to tighten the nuts until the front suspension is at ride height. The inboard end of the sleeve in the bushing is serrated and will "bite" into the step on the cross shaft once the nut is tightened. This locks the bushing in place rotationally relative to the cross shaft. This is what should be loose for now.
#5
Upper control arms
^^^This. The bushing outer shells should be pressed all the way into the control arms until they bottom. You do not, however, want to tighten the nuts until the front suspension is at ride height. The inboard end of the sleeve in the bushing is serrated and will "bite" into the step on the cross shaft once the nut is tightened. This locks the bushing in place rotationally relative to the cross shaft. This is what should be loose for now.
#7
Upper control arm
Yes the lowers were still on. The bushings are polyurethane and it has a crazy bumpy feel when I drive it. I may just go get some more closer to originals.
#9
#10
This depends on if the jack was under the spring perch or the ball joints. If it was under the ball joints, the lever-arm of the LCA is the same as if the car was resting on the wheels, so this would be true. If the jack was under the spring perch, the lever arm is shorter so the car will sit higher (UCAs hanging lower than normal).
#11
Upper control arm
This depends on if the jack was under the spring perch or the ball joints. If it was under the ball joints, the lever-arm of the LCA is the same as if the car was resting on the wheels, so this would be true. If the jack was under the spring perch, the lever arm is shorter so the car will sit higher (UCAs hanging lower than normal).
#12
This depends on if the jack was under the spring perch or the ball joints. If it was under the ball joints, the lever-arm of the LCA is the same as if the car was resting on the wheels, so this would be true. If the jack was under the spring perch, the lever arm is shorter so the car will sit higher (UCAs hanging lower than normal).
#14
Yes, with car supported on wheels (drive it up on ramps then lift rear end with a jack to level it out), loosen upper and lower control arm nuts on both sides of car. Bounce the front end a few times, turn the steering wheel back and forth to help the wheel track spread, bounce it again and then tighten everything to spec. This procedure is for rubber bushings.
#15
Ever wonder why on some cars when you jack under the spring perch, the car frame lifts faster than the wheel? Its because as you lift at the spring perch, the upward forces on the ball joints is transferred to a place of less leverage on the spring allowing the spring to expand. Another way to look at it is when the car's weight is resting on the ball joints, the spring perch acts as a fulcrum which results in downward force being applied to the car's frame at the LCA bushings. When you lift at the spring perch, this downward force on the frame is nearly eliminated.
Last edited by JohnnyBs68S; April 25th, 2019 at 06:14 AM.
#17
#18
https://en.wikipedia.org/wiki/Lever
Originally Posted by [color=#000000
kbdecatur[/color]]I loosened the all 4 bolts last night and I’m going to tighten them back up this evening. I see a slight change.
Thread
Thread Starter
Forum
Replies
Last Post
62 Cutlass Convert
Tech Editor's Desk
4
June 11th, 2015 09:15 AM