[Nexus313]

Originally Posted by FCobra94

What Were The Road Force Numbers!?!?!!!!!111?!

Unfortunately .. The guy told me his printer wasnt hooked up but the front left tire showed 46LB on the PLimit.

Originally Posted by Nexus313

Unfortunately .. The guy told me his printer wasnt hooked up but the front left tire showed 46LB on the PLimit.

Printer or not, the values should have still been retrieved, but either way...holy $hit! 46?!? The limit for most passenger car tires is 19lbs, IIRC, before the machine spits back a result of fAiL; hence the requirement to get those numbers down as low as possible.

What I have found in the past is that anything more than 9lb of road force will cause a hop/shimmy/bounce/vibration/etc. which is why I asked for your *specific* results for each wheel/tire to begin with.

[TemjinX2]

is there any way you can barrow some one elses wheels, just to eliminate any wheel/tire issues

[Nexus313]

Originally Posted by FCobra94

Printer or not, the values should have still been retrieved, but either way...holy $hit! 46?!? The limit for most passenger car tires is 19lbs, IIRC, before the machine spits back a result of fAiL; hence the requirement to get those numbers down as low as possible.

What I have found in the past is that anything more than 9lb of road force will cause a hop/shimmy/bounce/vibration/etc. which is why I asked for your *specific* results for each wheel/tire to begin with.

Shit I had no knowledge on roadforce balances.. but the place I went to is very reputable. He said I can come back anytime for adjustment if I'm unhappy with results.. so maybe I can go back and have them adjust it to 9lbs.. not sure if he left it around 19 or so.

I think the reason why only half the vibrations disappeared was because he left it in the low to high teens range for lb

Any clue what could have caused 46 lb?? Even they were surprised..

[Nexus313]

Originally Posted by TemjinX2

is there any way you can barrow some one elses wheels, just to eliminate any wheel/tire issues

I was really thinking of trying this.. I have to ask around with friends etc.

[TemjinX2]

Originally Posted by Nexus313

I was really thinking of trying this.. I have to ask around with friends etc.

worth a shot so you dont have to keep throwing money at the car.

i would check your local bmw fb groups too.

Originally Posted by Nexus313

Any clue what could have caused 46 lb?? Even they were surprised..

Pretty straight forward: if it's not the wheel, it's the tire...if it's not the tire, it's the wheel. That's the whole point of using this type of machine in the first place; with a competent technician behind the controls, it will tell you exactly where the problem lies. Since you're narrowing it down and only testing two major variables, issues can get chased down in a hurry, as long as they don't half-ass it.

Also "getting it down into the single digit range" doesn't just happen with continued iterations of Force Matching. Sometimes the hardware (wheel and/or tire) won't allow that. Wheels are either bent or they aren't; their runout value will (more or less) always remain static...the biggest variable, therefore, is the tire itself; understandably so given the nature of it's construction.

[dsjr2006]

Originally Posted by Nexus313

Here's what I got done..

Road Force balanced, (front tires were REALLY off)
Absolutely 0 bends or problems with my wheels.
One tire in the back had bubbles, so replaced that tire.
Wheels were all re-torqued BY hand.

Result: 50% of my vibrations are cured. They're still predominantly there however in the front end and very noticeable on the highway.

Here's what I think the culprit for the rest of the vibrations might be:
- The shitty alignment (refer to 1st post),
- The fact that the bolts on the front-end suspension job were tightened with just an impact wrench and no torque wrench (control arms) NEVER TRUSTING SOMEONE WHO RELIES ON AN IMPACT WRENCH EVER AGAIN!!!!
- My winter tires are just a shitty brand? (Sailun Ice Blazer WST1),
- Struts + Strut mount need to be replaced
- Flex disc + Center support + drive shaft needs to be balanced

Really stumbled...

You’re spending a lot of time and money for no reason. It’s your wheels or tires! Most vehicles don’t require multiple attempts at Road force balancing, somethings wrong. I’ve had wheels that looked okay, but didn’t check out when measured properly and tires that looks fine, but could never be balanced. Your tire shop can’t install some tires they have around to eliminate the crap tires?

[JuniorB]

Originally Posted by dsjr2006

You’re spending a lot of time and money for no reason. It’s your wheels or tires! Most vehicles don’t require multiple attempts at Road force balancing, somethings wrong. I’ve had wheels that looked okay, but didn’t check out when measured properly and tires that looks fine, but could never be balanced. Your tire shop can’t install some tires they have around to eliminate the crap tires?

It's not the alignment, an alignment does nothing to correct vibration. An alignment is for the car to track straight and to minimize uneven tire wear. You said you put winter tires on right?, winter tires have wider seeps to keep snow and mud off the tires. When you change back over,,you won't feel anything. Just because you see a computer graft of negative, dosent mean the car is wondering, or they messed up, or it's a bad place. Chances are you would never feel a degree or two. There are a lot of variables in doing alignments, now a days , this is all done by lazer, if a car has miles and worn shocks and springs, it will take this in effect. Swap the tires out, m+s tires will ride different than others. It's how aggressive the tread is, the more, the louder. You hear 4x4's all the time, cause they run an aggressive tread.

[Nexus313]

Guys... I got on the highway today back from work and the vibrations are back at full force... This time 100x worse and the steering physically shakes too. The entire car shakes. Everything even the windows.. vibrations are prominently in the front but are so bad that theyre shaking the entire car... The steering has little to no feel at all at high speeds and there's excessive play when going around bends, it's very dangerous and the car shimmys and moves directions on its own at high way speeds too.

As soon as I get off the freeway however .. it all disappears and the steering feel is restored as it was before.

What I found is when I come to a full stop when braking you can hear a creeking sound. I'm guessing this is struts? I'll add a video with the exact sound of this.

So lost as to what it is..

[YoungBlood]

Well, you got tires balanced. Suddenly it’s way worse. Sounds like it’s a wheel or tire... probably a tire and they did a shot balance job (something about an absolute shitton of road force up above? Lol)

[Bmw_Crazy]

Originally Posted by Nexus313

Guys... I got on the highway today back from work and the vibrations are back at full force... This time 100x worse and the steering physically shakes too. The entire car shakes. Everything even the windows.. vibrations are prominently in the front but are so bad that theyre shaking the entire car... The steering has little to no feel at all at high speeds and there's excessive play when going around bends, it's very dangerous and the car shimmys and moves directions on its own at high way speeds too.

As soon as I get off the freeway however .. it all disappears and the steering feel is restored as it was before.

What I found is when I come to a full stop when braking you can hear a creeking sound. I'm guessing this is struts? I'll add a video with the exact sound of this.

So lost as to what it is..

Have you worked on your drive shaft by any chance? Like removing it to change the guibo or something because if you did and didn't replace it back to the exact same spot that will cause that issue

Originally Posted by YoungBlood

Well, you got tires balanced. Suddenly it’s way worse. Sounds like it’s a wheel or tire... probably a tire and they did a shot balance job (something about an absolute shitton of road force up above? Lol)

Yeah seriously...

OP you changed one variable in the equation (wheel/tire balance) and conditions worsened...not hard to see where a major portion of the problem lies.

[Nexus313]

Miraculously.... When I hit the highway this morning the vibrations decreased and were back to the way they were a few days ago.. (not as crazy as yesterday).. it's very temperamental..

Here's a video I took of the sound from yesterday I get when braking. You can hear it 10 seconds into the video if you listen closely with volume up.

I'll be paying a visit to the wheel balancing place again today if I get time.

[Nexus313]

Originally Posted by Bmw_Crazy

Have you worked on your drive shaft by any chance? Like removing it to change the guibo or something because if you did and didn't replace it back to the exact same spot that will cause that issue

No have not yet touched the drive shaft.

[MysticRob]

You're still running those cheap Chinese tires right? Reputable and/or good reviews elsewhere or not, didn't you say earlier they were new, yet one already had bubbling and had to be replaced? Temp differences throughout the day can also affect a crappy tire...

You keep complaining about odd noises and stating your struts/shocks are done. Change them out then. Giubo? What say you actually diagnose everything that's wrong with the vehicle at one time and get it all done instead of piecemealing it, then coming back here to report that nothing has changed?

[Nexus313]

Originally Posted by MysticRob

You're still running those cheap Chinese tires right? Reputable and/or good reviews elsewhere or not, didn't you say earlier they were new, yet one already had bubbling and had to be replaced? Temp differences throughout the day can also affect a crappy tire...

You keep complaining about odd noises and stating your struts/shocks are done. Change them out then. Giubo? What say you actually diagnose everything that's wrong with the vehicle at one time and get it all done instead of piecemealing it, then coming back here to report that nothing has changed?

Yeah +1 on the tires.. I'm really doubtful of this brand now.. it smells like burning rubber Everytime I come home from my commute (100Km per day)

I've called the balancing place back. They offered me to come in and redo the road force balance as well as troubleshoot further.. (possibly even putting on a different set of rims and tires to see if it makes a difference..).. I'll make sure I come back with numbers this time.

[bmuum3]

Originally Posted by Bmw_Crazy

Have you worked on your drive shaft by any chance? Like removing it to change the guibo or something because if you did and didn't replace it back to the exact same spot that will cause that issue

I changed my guibo along with my CSB and I suspect even tho I marked both sides of the driveshaft they are now out of balance. Need to find a place to get it reblanced.

[Nexus313]

Originally Posted by bmuum3

I changed my guibo along with my CSB and I suspect even tho I marked both sides of the driveshaft they are now out of balance. Need to find a place to get it reblanced.

How bad are your vibrations? Before and after.

[Nexus313]

Okay guys. Went back today.

The owner of the shop whose more competent in diagnosing inspected my situation and the balance today. I think we've finally diagnosed the issue.

It's a combination of Very very shitty tires, Minor slight bends in most of my rims, and possibly struts, and bad allignment.

It's mainly the crappy tires. The problem is when the tires get balanced.. vibration goes away slightly.. but then after a week of commuting they wear so much that they go out of balance. In addition to that these tires developed bald spots and bubbles very easily after a few months. Uneven wear and bald spots could be the allignment and struts however, but we're pretty certain it's these crappy tires.

I smell burning rubber everyday. I don't even drive hard.

Here's my solution: ride out the winter with this terrible setup. And wait until spring to get Michelin PSS or continental dws on Apex rims, Along with performance struts and better springs (maybe I'll go lower ). Then get an allignment.

Moral of the story; STAY away from Sailun, or any other shit china brand. Lesson learned here!!

[JuniorB]

There's been mis information given about alignments and what specs are suppose to be. If your alignment was off, your steering angle sensor would kick in. Most of the time , a good shop will check your suspension for wear prior to alignment, as it won't compensate for worn components, as I've said, there are many variables when doin one, and there's more than hand just putting it up on a rack. Always have a shop who's knows the vehicle, and procedures. Anytime you have one done, try to include the weight that's carried 80% of the time. Tires do have a major role in the way the car rides, and all are not created equal. Winter tires, summer, and all season all have different rubber compounds and require different psi that also plays a roll in how the car drives.

[rjahl]

Originally Posted by Nexus313

Okay guys. Went back today.

The owner of the shop whose more competent in diagnosing inspected my situation and the balance today. I think we've finally diagnosed the issue.

It's a combination of Very very shitty tires, Minor slight bends in most of my rims, and possibly struts, and bad allignment.

It's mainly the crappy tires. The problem is when the tires get balanced.. vibration goes away slightly.. but then after a week of commuting they wear so much that they go out of balance. In addition to that these tires developed bald spots and bubbles very easily after a few months. Uneven wear and bald spots could be the allignment and struts however, but we're pretty certain it's these crappy tires.

I smell burning rubber everyday. I don't even drive hard.

Here's my solution: ride out the winter with this terrible setup. And wait until spring to get Michelin PSS or continental dws on Apex rims, Along with performance struts and better springs (maybe I'll go lower ). Then get an allignment.

Moral of the story; STAY away from Sailun, or any other shit china brand. Lesson learned here!!

I feel your pain. Twice I had a similar problem. Vibrations then balanced my tires with little improvement. Checked drive shaft, Giebo center bearing etc. new tires fixed the problem.

Short version of the story