[CnSky]

Maybe someone on the F10 forum has experienced this, having following issue on my G30.

Figure a lot more experience here on similar issues.

Wheel sticks out further back left after spacers installed. Wheel had a bad buckle when I purchased the car so that side took a bad pot hole hit.

Also very slight shaking side to side when driving slowly on anything but a perfect surface.

Install of the spacers is perfect, think I have a bushing or arm damaged but which one is the issue?

Back of wheel seems further out than opposite side but it aligns perfectly on KDS.

Any help much appreciated.

One Rear wheel sticks further out? https://g30.bimmerpost.com/forums/sh....php?t=1822637

[Unspec]

How is the wheel sticking out? Is it sticking out uniformly, as in it looks like it has massive spacers, or is it heavily cambered in/out?

[Surly73]

"Shaking side to side" has me thinking that it is not just the wheel that's bent, but the bearing or hub is damaged and the entire thing is wobbling. Depending on where in the rotation the wobble is, it looks (or aligns) properly or not.

Have a buddy idle your car forward in an empty parking lot and observe from another car to see if you see wobble. Spinning up the rears on a lift would also shed some light but is a bigger pain to accomplish.

Wondering if the car didn't slide sideways into a curb or something like that. See a lot of stuff like that in winter driving conditions where I am.

EDIT: Now - is this only a problem with spacers? Then I'd start questioning the quality or the proper fitment of the spacers.

[CnSky]

Thanks guys it's sticking out uniformly as in it's about 5-7mm further out than opposite side.

Most noticeable at rear but alignment and height all check out so it's just more noticeable as it aligns with the body panel there.

Spacers are installed perfectly and high quality I checked with a callipers when bought and fitted them perfectly.

It's either an arm is bent/bad busing or the rear subframe isn't perfectly centred but from the g30 manual seems it's aligned to lugs so not sure I could pull is a few mil if I lose up the bolts or not see image below.

Also alloy was buckled on inner side so not a slide into a kerb but that doesn't mean a big pot hole didn't bend abs arm a slightly or damage a bushing.

Also the wheel moves forward to settle when jacked up not sure that is normal. It actually scrapes along the gravel for about 10mm and comes to rest as weight comes off.

[Blue Angel]

I'm going to guess an alignment issue. Rear camber is adjusted with the upper control arm, so an incorrect camber setting could result in the wheel looking outboard.

[CnSky]

Camber and toe are perfect I adjusted them with the local Indy on the KDS alignment machine.

We even tried winding them all in to see if we can get it to look right visually but not possible




QUOTE=Blue Angel;27633536]I'm going to guess an alignment issue. Rear camber is adjusted with the upper control arm, so an incorrect camber setting could result in the wheel looking outboard.[/QUOTE]

[Unspec]

Your subframe did not shift lol, it would take a fuckton of force to do that, to the point where your car would be absolutely roasted. You've probably bent one of the control arms.

Also, to be sure, you replaced or repaired the buckled wheel?

[CnSky]

Put a set of brand new alloys and tyres on.

So any idea what arms to change first?

I have a pair or rear trailing arms so will try that this weekend.

Somethings definitely off car rear just isn't stable even though it aligns. Shakes side to side way too much in even the slightest uneven surface.

BMW have looked at it twice said they can't see any problem.

I have go pro videos of the rear suspension arms when driving and can't see anything moving. Going to mount it looking down at the wheels tomorrow and drive.

Could it be a bad top mount allowing the shock to move around?


QUOTE=Unspec;27635421]Your subframe did not shift lol, it would take a fuckton of force to do that, to the point where your car would be absolutely roasted. You've probably bent one of the control arms.

Also, to be sure, you replaced or repaired the buckled wheel?[/QUOTE]

[CnSky]

See photos taken from same spot on front door handles.

Seems to me the front of the wheel sticks out in the left hand side and then because that will require the tow adjustment put to maximum out position to align the rear also sticks out.

If I can get the front to move in the rear will follow when aligned again.

[Blue Angel]

Originally Posted by CnSky

Somethings definitely off car rear just isn't stable even though it aligns. Shakes side to side way too much in even the slightest uneven surface.

Could it be a bad top mount allowing the shock to move around?

I'm wondering if one of the rubber joints in one of the arms isn't blown out due to the impact? Basically, a bushing that's still there but is now much more compliant than it should be, allowing more movement of the knuckle relative to the arm. The only way to check that would be to pull the arms out one by one and check each joint.

Example: if the lower control arm had a completely blown out joint, it could allow the wheel to sit further outboard than it should. If there's enough adjustment left in the suspension you could still get it to nominal. Just a theory.

The shock mounts are very unlikely to affect the alignment or position of the knuckle.

[CnSky]

Thanks that's exactly what I'm hoping is the issue as apart from that I'm totally stumped.

Think I will jack her up and start removing some arms this weekend. I have two rear arms already so will try them first and the forward trailing arms are the same PN on either side so think a swap and see what happens is worth the hours work.

Will let you know how I get on.

[Hoa]

Sounds like your vehicle may have been in an accident previously and it wasn't repaired properly.

[CnSky]

Don't think so we have had a good look and nothing is bent or damage and BMW looked twice in the area.

The subject corner alloy when purchased had a huge buckle so it's definitely hit the mother of all potholes which is what I suspect caused the issue.



QUOTE=Hoa;27639221]Sounds like your vehicle may have been in an accident previously and it wasn't repaired properly.[/QUOTE]

[Surly73]

I would think that anything with that much play should be found as part of the pre-alignment inspection. Technicians are supposed to ensure that tie rods can be turned freely, bushings and balljoints aren't shot etc... Your report of "side to side" movement while driving is concerning and a cause should not be elusive to a shop.

If you've got video in motion, maybe post it. Should be interesting to view at the very least.

[CnSky]

I made tons of videos of the suspension links etc when driving can't see any movement other than the rear subframe back and forth which I'm told is normal. You can find the videos below

QUOTE=Surly73;27639973]I would think that anything with that much play should be found as part of the pre-alignment inspection. Technicians are supposed to ensure that tie rods can be turned freely, bushings and balljoints aren't shot etc... Your report of "side to side" movement while driving is concerning and a cause should not be elusive to a shop.

If you've got video in motion, maybe post it. Should be interesting to view at the very least.[/QUOTE]

[CnSky]

Going to video from above wheel when attached to the body and see if the back left is wobbling.

Also front left looks weird when videos above but may just be the threads are not perfectly straight.

[Surly73]

Had to scroll back to the top to see what kind of car this is, because the wishbones and other components are a lot different than the F10. Looks like they now use steel for these on the G30 now - 5ers back to at least the E39 used all aluminum.

Anyways, on the LR video I was watching the top bolt at the knuckle to the "steering rod". It could be an illusion but watching how much of the nut is visible past the wheel seems to change. Some deflection under heavy forces is always possible, but could be a bad wheel bearing or hub issue. I'm not sure how much visible deflection is normal. (Or ir could be my imagination). I'm in the salt belt and on several cars I've had rust build up on the inside lips of rotors and stuff after a few years that only starts to scrape on something when cornering, meaning that wheel bearings deflect a little bit normally.

[CnSky]

Surly which video was that in?

[CnSky]

Surly did you mean the front right video on my you tube channel?

[Surly73]

Originally Posted by CnSky

Surly did you mean the front right video on my you tube channel?

The left rear one which was included in the post above....

[CnSky]

Think i may have figuired this out finally thank to you Surly73

I found a new surface car park and did tight circles, the car clearly wobbles when driving in a tight right hand cirle but doesnt in a left hand circle.

Think I have a bad back left bearing/hub.

It also happens to be the corner that had a huge wheel buckle when I bought the car and sticks out slightly futher than the other side (5mm). 3 issues on the same corner mean its unlikley a coincidence.

Would that make sense, is my test logical regards a bearing.

[Blue Angel]

In my opinion, if you have a wheel bearing with anywhere near enough play to cause a visual or alignment issue, you'll be listening to it screaming and watching the wheel wobble constantly. Your car would sound like it's about to explode at any normal speed.

My bet is something other than the bearing.