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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 10-15-2006, 05:05 PM   #1 (permalink)
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Angry Help!1 uneven rear tire wear on inside only, camber???

I need some help.
My rear passenger side tire is wearing heavily on the inside only. No feathering just worn down. Outside 1 inch looks nice and even, same as others.
The other 3 tires are wearing perfectly even.
How could this be?
Ive got my new Bentley manual in front of me but I cant figure it out.
It looks like too much negative camber on one wheel?
But rear camber is not adjustable?
Could something be bent, or some bushings worn out?
Trailing arm mount(s)?
Could bad toe in cause this wear????
I have brand new BS sport shocks, ST springs, and upper rear mounts which would screw up camber if broken right?
I still have stock sway bars, could this effect tire wear?
I want new ST sway bars, 22/19mm, but may need tires first and fix this problem?

Could the LSD be spinning this wheel only whe I light em up, very rarely.
Or am I just taking too many right hand turns too hard?
Last autocross was mostly clockwise?

They are old Dunlop A2 SP? 205 60 14's, I want to get new Yokohama ES100 205 60 14's, but need to solve this first I think?
Maybe I'l l crawl up in there later today and look some more.

Any sugestions as to what to look for?

StarMavin?

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Old 10-15-2006, 08:04 PM   #2 (permalink)
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Old 10-15-2006, 09:15 PM   #3 (permalink)
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Four things can cause this, the most common are:

1- Bad swing arm bushings
2- Incorrect alignment after installing lowering springs
3- Broken spring.

Bad sub-frame bushings can also cause this, but they have to be really bad.
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Old 10-19-2006, 02:32 PM   #4 (permalink)
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Jack that corner and check for play, if that’s ok get the alignment checked
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Old 10-19-2006, 03:31 PM   #5 (permalink)
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Rear alignment setting are NON-ADJUSTABLE on an E30 unless you install aftermarket parts that allow you to make changes to the alignment angles.

To the starter of this thread can you post a picture of your left and right rear tires for compairson? Also if you get on the gas harder when you take right turns than you do for left turns this will cause the inside edge to wear more on the right side.
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Old 10-19-2006, 09:59 PM   #6 (permalink)
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OK camera is charging.
I'll get good pics later,or tomorrow.
Also I crawled under there the other night and nothnig looked wrong until I compared right to left.
Left shock looked straight and centered were tube comes dow out of sleave. Right looks like its of center. In the exact direction it would be if it the camber wasnegative.
???
Somethings out of wack.
The shocks and mounts are brand new?
I'll take pics and poke around some more,later.

Thanks in advance for the help!!!
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Old 10-21-2006, 08:17 PM   #7 (permalink)
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pics???

OK Ive looked some more.
took some pics
Will add more
Thanks for the suggestions.
Looks like I have a good deal of negative camber on both rears.
More on the right.
The left looks a little uneven too just not as bad.

Is this just from the shorter springs?

I like the idea of some negative camber but not the excessive wear on the right rear.
Maybe I'llj just get the new yokahamas and see what happens?
Maybe rotate em more often.
Which I dont know how to do onthis set up.
front to rear only? (makes sense)
left to right?
diagnal?

The dunlops and the yokohamas have directioal tread that will go different directios if on left or right?
Whats up with that?
I'll ask at discounttire.

Still need to jack it up and check for loose parts too.
Maybe tomorow or or tonight,had to work today Sat. bummer.
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Help!1 uneven rear tire wear on inside only, camber???-oct-2006-069.jpg   Help!1 uneven rear tire wear on inside only, camber???-oct-2006-068.jpg  
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Old 10-21-2006, 08:20 PM   #8 (permalink)
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More pics AJ? Starmavin?

More pics
see shocksoffset
see tire tread on inside of right rear
What do you think?
Is there a way to check alignment in my own garage.$$
LOL
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Help!1 uneven rear tire wear on inside only, camber???-oct-2006-070.jpg   Help!1 uneven rear tire wear on inside only, camber???-oct-2006-072.jpg   Help!1 uneven rear tire wear on inside only, camber???-oct-2006-071.jpg   Help!1 uneven rear tire wear on inside only, camber???-oct-2006-073.jpg  
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Old 10-24-2006, 12:45 PM   #9 (permalink)
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I don't see anything abnormal. The way the shock sits in the plastic boot doesnt mean anything. The tires look close in wear, with the right one being a little more worn. I have a feeling that when you start to spin the tires the right one starts to spin first or you spin the tires more going arround right turns than you do left turns. It wouldnt hurt to put all new bushings in the rear but that is a big job because the easiest way to do it is to take out the complete rear subframe with the control arms. If you decide to do that it is also the best time to put in new brake hoses because with the rear control arms still in the car the rear flex lines are a pain.

If I were you and money was tight, I'd slap on a pair of new tires to see if it did it again. If you have the money I'd do new tires and all new bushings and brake hoses.
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Old 10-25-2006, 10:33 PM   #10 (permalink)
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Kool Thanks a bunch for the feedback.

Gonna get the Yokohamas next week(payday).
AVS ES 100 205/60-14
$95 ea $460 total at Discount tire mounted and balanced, CA tax, disposal.
Minus $25 rebate from Yoko. == $435
About the same from Tire rack once deliverd mounted and balanced etc.
We will see how they wear.
Wish I could upgrade from the 14x6.5's to 16x7's, maybe next year.

BMWCCA auto cross in a few weeks, Cant wait to see how they run.
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Old 10-26-2006, 07:15 AM   #11 (permalink)
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That's funny, the outside of my driver's front is doing the same thing, basically. I think it's my alignment. It's eating the shit out of my tire.
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Old 10-26-2006, 05:56 PM   #12 (permalink)
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Hey Idsbeaker,

If you get it aligned let me know what was wrong, camber, toe in, or caster?

I'd guess cambers off.
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Old 10-26-2006, 08:01 PM   #13 (permalink)
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I have found that under acceleration the rear contol arms move out of alighnment from weak bushings, even though they may seem tight when checked by hand. Also when you lower your car you have to have all 4 wheels realighned.
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Old 10-26-2006, 10:37 PM   #14 (permalink)
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Quote:
Originally Posted by Starmavin
Also when you lower your car you have to have all 4 wheels realighned.
How? Unless you install aftermarket pieces in the rear suspension there are NO rear adjustments that can be made to an E30. I have -2.8deg camber front and -2.6deg rear and my tires wear out even cause I drive my car like it is built for. If you get inside edge wear on your tires after you set the toe properly on the front then you arn't driving the car hard enough When I go realign my car in a few weeks I'm probably going to bump the camber to -3.0deg on the front cause I'm still getting a little outside edge wear on the front tires with street driving
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Old 10-27-2006, 09:08 AM   #15 (permalink)
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lol noice, -3* on street with even wear, thats hot, that sounds like the scirocco lol
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