Q: G-sedan is leaning, need help
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Originally Posted by dcreigh1
Since I work for an OEM and have done tens of thousands of alignments (as a Quality Engineer), I believe that I am qualified to answer this riddle. First though, I'd like to ask a few questions and then send you in a couple of directions.
1) was it sitting like this when you purchased the car?
2) Did it just happen after the suspension change
- were there spring and strutt replacements?
If you noticed it after the suspension swap, chances are that the culprit is in the spring and strutt. They can vary over time but not very likely. The other option is that the car was allways like this and you just noticed it. If that is the case, then its in the sheet metal the way that the sidemember and hang on parts are attached. If its the S/M, then there is nothing you can do. If the height of the car when calculated off the axle assembly is correct from left to right, then there is nothing to worry about.
If it is in the springs, change them from left to right. Sometimes this makes a difference. At MB our supplier, Bilstein, compresses the springs to a certain weight and then checks the drop in height to what it is supposed to be. They then add shims to get the rideheight to the proper position. Try the swap process, if its still bad, chances are its in the S/M and if you really really want to change it and have the left equal the right, then add shims to the springs and strutts.
Hope this helps.
1) was it sitting like this when you purchased the car?
2) Did it just happen after the suspension change
- were there spring and strutt replacements?
If you noticed it after the suspension swap, chances are that the culprit is in the spring and strutt. They can vary over time but not very likely. The other option is that the car was allways like this and you just noticed it. If that is the case, then its in the sheet metal the way that the sidemember and hang on parts are attached. If its the S/M, then there is nothing you can do. If the height of the car when calculated off the axle assembly is correct from left to right, then there is nothing to worry about.
If it is in the springs, change them from left to right. Sometimes this makes a difference. At MB our supplier, Bilstein, compresses the springs to a certain weight and then checks the drop in height to what it is supposed to be. They then add shims to get the rideheight to the proper position. Try the swap process, if its still bad, chances are its in the S/M and if you really really want to change it and have the left equal the right, then add shims to the springs and strutts.
Hope this helps.
To answer your questions;
- I didn't notice it sitting like this until after I installed stillen sway bars (prior to swapping the suspension). So I did notice this leaning on the OEM suspension. It may have been like this *before* the sway bars - I just didn't notice. I did undo the rear sway bar and it was still leaning.
- suspension swap was rear spring and shocks and front struts (springs and shocks). The swap was with an almost brand new 05 coupe (performance set off the 19" coupe) (only 400miles on the set). (white dot on the tower I think)
Good point about measuring the axle assembly - I will try measuring the height difference there and see how that comes out. I did measure the front and it is pretty even.
If there is still a difference I will try switching the springs.
If this doesn't work, I will consider some shims, but I was hoping for lower, not higher - maybe shave the rubber spring seat?.
Would adjustable tie-rods to the rear sway bar allow for this kind of adjustment?
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well, an update;
I measured the height to the frame - there is a 0.75" difference between driver side and passenger.
I then swapped the springs, which made no difference.
Man! do I have a bent frame? Any other ideas?
Would adjustable end-links make a difference? - based on disconnecting the sways (and there being no difference), I would suspect this would not make any difference.
Anything else (other than adjustable shocks).
I measured the height to the frame - there is a 0.75" difference between driver side and passenger.
I then swapped the springs, which made no difference.
Man! do I have a bent frame? Any other ideas?
Would adjustable end-links make a difference? - based on disconnecting the sways (and there being no difference), I would suspect this would not make any difference.
Anything else (other than adjustable shocks).
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Rhinos7777
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