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  #11  
Old 04-25-2012, 09:10 AM
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JCL gives good advice there. I have the same problem with tire wear before, and did lots of researching. My conclusion: have the camber set to minimum within spec (closest to 0) then have toe set as closed to zero (NOT within spec) as possible to compensate for negative camber. (Thanks member "ard" for the advice)
I have to request the tech at Firestone to set toe to -0.01 and -0.02. Don't let them talk you to accept "within BMW's spec"
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  #12  
Old 04-25-2012, 09:35 AM
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I am having some crazy negative camber in the rear and I just had an alignment back in Sept. 2011. Went to Sears on Monday to get a check up and look at the nightmare:



I will be proceeding to getting new rear bushings and control arms.
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Old 04-25-2012, 12:29 PM
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Quote:
Originally Posted by tmv View Post
JCL gives good advice there. I have the same problem with tire wear before, and did lots of researching. My conclusion: have the camber set to minimum within spec (closest to 0) then have toe set as closed to zero (NOT within spec) as possible to compensate for negative camber. (Thanks member "ard" for the advice)
I have to request the tech at Firestone to set toe to -0.01 and -0.02. Don't let them talk you to accept "within BMW's spec"
Ask for +0.01 toe, not negative.
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Old 04-25-2012, 12:44 PM
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In NY Competition BMW of Smithtown replaced arms left and right rear for $1500 they could not even get it aligned before. I get even wear on my rear tires ever since. (1.5 years now no signs of inner rear wear) Note: I have 315 in the back.
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  #15  
Old 04-25-2012, 01:02 PM
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Quote:
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I have 315 in the back.
I'm running 315's also.
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  #16  
Old 04-25-2012, 08:14 PM
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i also have 315's on the rear of my X and they are wearing evenly across the tyre, i did get a well respected indy to do an alignment not long after i got the car tho.

but tell me what did you need to spend $3200 for to service a car with 40 something k's

that seems way to much.
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  #17  
Old 04-26-2012, 07:44 AM
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The solution to the problem is to change the rear wheel carrier bushing and upper rear control arm. Then have the car aligned.
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  #18  
Old 04-30-2012, 10:48 AM
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Inner Tyre Wear on Rear Tyres

I had this problem - down to 2mm on inner edge of tyres after 6000 miles. Told by one service centre - all X5s do it as they have large negative camber. I did not believe this. Spent some time investigating on the Internet and have seen most of the comments posted on here somewhere or another - many are misleading or incorrect. I did discover a youtube video showing replacement of the balljoint at the end of the lower suspension swingbar. This is not a true 'ball joint' but is a cylindrical bearing with some rubber inserts forming part of it. The only way that wear in this can be detected is by taking the tension out of the rear suspension (joint) by compressing appropriately (possibly depressurising a rear air suspension) - just jacking up the car will NOT allow the wear to be spotted.

I searched around for a repair shop with a reputation for BMW servicing/repair - pretty much a backstreet operation but busy. The mechanic confirmed (without prompting) precisely what I discovered. The swing arm bushes were replaced together with the control arms which possess two joints themselves. To date the excessive wear seems to have stopped.

Common sense tells you that if the 'ball joint' on the swivel arm is worn, then from the mechanical arrangement it will not just affect the camber of the wheel but will also affect the tracking dramatically. The problem is that the wear in this joint will not be spotted unless the maechnic is specifically looking for it and knows what he is doing. Provided that the control arm ball joints are OK, wear in the swing arm joint (unless extremely excessive) will not show up when checking tracking as there is no twisting torque from load on the wheel to throw the tracking out - unlike when driving.

Apparently the X5 wears out these joints in about 60K miles. My cost for the job - about £500

How this helps !!!

Last edited by lewisjh; 04-30-2012 at 10:55 AM.
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  #19  
Old 04-30-2012, 01:58 PM
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This winter my winter tires had a sudden bout of inside shoulder wear whereas this was never a (major) problem on my 4.4. So out came the jack to check.

Checking for wear on the knuckle of the upper CA is not hard with an SLS. Jack up the rear of the car, take out the spare tire (remove ign key to be sure the pump doesn't kick in) and release the airlines going into the accumulators slightly so they bleed off pressure. Grab the rim on either side once the pressure has gone and see if it moves. My 4.8 which I checked last weekend had no movement but the 4.4 was a disaster area. Both upper CAs were completely shot.

I have the whole rear shooting match on order, including new bearings, to fix this.
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  #20  
Old 04-30-2012, 03:40 PM
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Hey all, I just went thru this on my 03 4.6 w/93K miles. I run 315/35/20 on the rear. Right rear had wear on inner side, the remaining 3 tires had no unusual wear. I took it for an alignment and the camber on the right rear could not be adjusted to spec, close but just out of the accepted margins.

I went on the forums and was advised it was probably ball joints or upper control arm (refered to as the wishbone in parts diagram). I was in denial about this but after lots of prying on the suspension my alignment guy and I determned it could be these two parts so I ordered the wishbone and ball joint for both left and right sides from Rocky Mtn European. I thought since I was messing with one side I might as well do the other. Total parts were $281, alignment $150, labor $377, and two new Vredesteins $500.

For the new allignment we followed recommended specs ie, a full tank of gas, 150 lbs on left and right front seats, 150 lbs in middle back seat and 46 lbs in the cargo area. Everything was able to be adjsuted perfectly. The alignment guy was very pleased with the results and was pretty sure changing the wishbone and ball joint was needed. Hope this helps.
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