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Offset bushing failure analysis

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#1
FTodaro

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Some time back we discussed the potential of an offset bushing moving and if it was a risk.

 

I was doing an alignment on a customer car and could not get the correct amount of camber. Upon closer examination, one of the front upper offset bushing had rotated and snapped off the rivet that i used to hold it in place.

 

The issues were that the control arm  i started with was a bit rusty from a part car, also the car took a decent hit in the front.

 

My point is that they can move and if your numbers are not adding up its worth to take a good look at that.

 

:blink:


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#2
davew

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Not being accusational at all. But I can see no way for one bushing to rotate without the other one rotating unless they where install wrong(not perfectly in line) or from crash damage.

 

The inner sleeve rotates within the bushing. So there should be no rotational forces on the main part of the bushing.

 

just my opinion

dave


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#3
FTodaro

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Not being accusational at all. But I can see no way for one bushing to rotate without the other one rotating unless they where install wrong(not perfectly in line) or from crash damage.

 

The inner sleeve rotates within the bushing. So there should be no rotational forces on the main part of the bushing.

 

just my opinion

dave

Well i can confirm they were facing the right direction when they were installed because the rivet I put in there sheered and I could see it had rotated. It was a pretty big hit but i am leaning toward that the integrity of the control arm where you press in the bushing was not that good. The bushings went in easier that they should have. I am thinking that was a big factor. But you can accuse me if you want :)


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#4
38bfast

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If not riveted I have seen them move fore / aft. We use steel rivets and have not had a issue. 

 

So yea Frank its your fault :)


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#5
Jim Drago

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We rivet them as well

 

Can we all just go back to bending spindles now :(


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#6
TylerQuance

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I'm too new to this to have seen as many failures as you guys have, but rivets didn't sound like a good idea so I drill the arm and bushing for a 1/4" dowel pin and tack weld the pin to the arm. I try to leave a little of the pin protruding from the back of the arm in case I need to grind off the weld and pull the pin out to remove the bushing later. 


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#7
Dave D.

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Are you talking about the Whiteline or the ISC bushings? I have seen a few ISC poly bushings move after the rivets snapped. It happens more to the guys bashing curbs harder than others. The bushings were coming with 1/8in rivets, but I would rather install 3/16 steel to see if that helps. Otherwise I too, would rather tweak spindles than deal with the PIA BS involved with installing/maintaining bushings or the poor quality/durability of the extended ball joints.



#8
FTodaro

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Are you talking about the Whiteline or the ISC bushings? I have seen a few ISC poly bushings move after the rivets snapped. It happens more to the guys bashing curbs harder than others. The bushings were coming with 1/8in rivets, but I would rather install 3/16 steel to see if that helps. Otherwise I too, would rather tweak spindles than deal with the PIA BS involved with installing/maintaining bushings or the poor quality/durability of the extended ball joints.

These were Whiteline. I did use Steel rivets this time not sure about the initial install.


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#9
Tom Sager

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We rivet them as well

 

Can we all just go back to bending spindles now :(

 

Have at it, but only the rear suspension.


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