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Upper Control Arm Support Tool

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6.5K views 29 replies 17 participants last post by  Brian Conway  
#1 ·
Got some vitamin D yesterday welding up my version of the Upper Arm Support tool (F1090-B) as shown in the factory service manual. I didn't have the 3/8" steel specified so I used 1/4" and a pair of buttresses instead of the welded pieces on the "C" end. I figured the buttress approach would prevent the thinner-than-spec'd steel plate from bending in the middle under load and it would also allow much more reliable support given my crappy welding skills. I've still got a bunch of cleanup to do but I think I'm going to test it by installing it and letting it sit with the car jacked up over the weekend. Eventually I want to paint it flourescent orange to help me see it so I remember to remove it before I drive the car.

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#2 ·
That should work. Another solution, if you don't have a welder, is to cut 3 pieces of 3/8 cold rolled and plate them together, as shown, and drill 4 holes, 2 top and 2 bottom, and use rivets (heated and hammered, not "pop" rivets) to securely clamp them together. Bolting should also work...

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#6 ·
I have one of these cut for each side. I slide them in every time I jack the car off the ground. Simple fix to keep the shock from over extending
Not criticizing - I've seen this approach before but I'm leary of using wood. Having done a lot of woodworking and construction stuff, I don't believe wood has the right characteristics for this application. Not saying it doesn't work because it obviously does - just saying that I am not comfortable using it for this purpose.
 
#20 ·
I thought maybe I should explain why I don't care for the wood 2x method.

First of all, most of the two-by wood I see in use is pine. It's soft and can be compressed. This can, if conditions are right, cause a piece of lumber to fail.

Second, it's only one piece. I see this as an issue because the grain in a single piece tends to run in one direction, which means that the wood will split along the grain when/if it fails. If it splits, the control arm may suddenly be unsupported and bad things may happen.

If I were to use wood, I would use two one-by pieces of hardwood laminated together such that their grains were perpendicular. That would greatly reduce the risk of failure due to splitting along the grain of a single piece.

Reiterating, I'm not criticizing anyone.
 
#29 ·
you need to be a Houdini to get the in. use a 4" long 2x4 and put it in against the grain. If you are lucky they will fall out when you let the car down.
when you forget to take them out they will fall out and not do any or much damage. just cut another one
 
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