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      03-03-2016, 07:59 AM   #1
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Noise in rear suspension

I am hoping for a little help.

I got an alignment the other day and since then I am hearing occasional popping sounds from the rear. I want to check the bolts to make sure they all got properly locked down, but I don't know which ones are adjustable. If anything seems amiss, I will go back to the alignment shop, but would rather just check it myself initially. Can anyone describe for me which bolts are used for the camber and toe adjustments in the rear?

The sound is random. I usually notice it when first starting off with some turning, but it is not reproducible. Once it occurred while leaving a parking lot that had a particularly steep curb ramp, popped while the rear tires went down the ramp slight a angle, car was moving perhaps 2-3mph, not turning much at all.

I have had limited slip differential noises in a previous car and that was easy to reproduce, happened every time. Yesterday I did some figure eights in a parking lot at full lock and heard no sound, reassured myself that everything must be tight. Then the next time I drove the car, I heard it once at a random stoplight.
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      03-03-2016, 09:00 AM   #2
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Sounds like maybe the shop forgot to fully tighten one of the suspension bolts. I would take the car back - since it wasn't doing this before the alignment.
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      03-03-2016, 12:53 PM   #3
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Can you tell me which bolts are the adjustment bolts? Inboard side of LCA?
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      03-03-2016, 08:20 PM   #4
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UPDATE: Returned to the shop.
The camber bolt on the left LCA may have been slightly looser than the one on the right, but it was by no means loose. He re-tightened them all while I watched and there was very little movement. Pulling hard on a 12" driver may have rotated the nut 1/24th of a turn at most.

We then checked the alignment and it was off very slightly from the prior, but only as much as could be expected by having well under a half tank of gas. It was full when I went there Monday. There was a 0.1 degree difference in camber on the right rear (this is rounded to the nearest tenth) and about 3/1000ths of a degree toe change on each side in the rear.

Half tank of fuel (7 gallons) weighs about 50-60 pounds. When I got out of the car, the camber decreased by 0.1 degree front and rear on the left and the toe numbers shifted by 2-3/1000's of a degree all around. My weight is distributed front and rear, mostly on the left, so I think the difference in fuel made for the miniscule changes we saw in the rear alignment.

Having said that, I drove back to work and then home tonight and never heard another pop. Based on the past few days, I should have heard it at least once between those two short drives. We'll see if I keep hearing it.
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      03-03-2016, 09:23 PM   #5
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funny....i just heard this very noise on the last few miles of my ride home today
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      03-04-2016, 08:17 AM   #6
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Quote:
Originally Posted by greenc51 View Post
funny....i just heard this very noise on the last few miles of my ride home today
Interesting . . .
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      04-13-2016, 09:54 PM   #7
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loose bolt/nut will do it.
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