|
|
SUPPORT ZPOST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS! |
Post Reply |
|
Thread Tools | Search this Thread |
12-02-2010, 10:47 PM | #1 |
Needs FI
6
Rep 73
Posts |
Broken rear control arms
Took my car in after noticing something wrong during a trip in the canyons. During turns, the car no longer seemed stable and felt like the rear end was moving all about. I thought I had a flat tire at first, but after a visual inspection and stopping at a gas station for air, the tires seemed fine.
Took it into the mechanic and he reported that both rear control arms were broken. My questions to you guys is do both arms just brake like that, together? and also how long should the repair take? Can it be DIY? Thanks in advance! |
12-03-2010, 07:25 AM | #2 |
Major General
374
Rep 8,033
Posts |
Are you the original owner? The arms were probably damaged some time ago if the car has been involved in an "incident." Or someone might have tried to jack the car up the wrong way. I would have them inspect the entire suspension and subframes while swapping out the control arms.
__________________
|
Appreciate
0
|
12-03-2010, 10:24 AM | #3 |
Lieutenant Colonel
41
Rep 1,855
Posts |
Wow. Sorry to hear about that. Hopefully, you get that fixed soon.
__________________
///M Coupe: RPI Scoop, OE Strut, CDV, Volk RE30, SS Brake Lines, Stromung Exhaust |
Appreciate
0
|
12-03-2010, 11:32 AM | #4 |
Midlife Crises Racing Silent but Deadly Class
1820
Rep 5,337
Posts
Drives: 2006 MZ4C, 2021 Tesla Model 3
Join Date: Oct 2007
Location: Welcome to Jamaica have a nice day
|
There are multiple control arms in the rear, there's an upper control arm which the spring seats in, a lower control arm that ties the subframe to the king-pin, and a trailing arm that ties the king-pin to the chassis at the front of the wheel. Which one of these control arms broke?
__________________
Sitting on a beat-up office chair in front of a 5 year old computer in a basement floor, sipping on stale coffee watching a bunch of meaningless numbers scrolling aimlessly on a dimly lit 19” monitor.
|
Appreciate
0
|
12-03-2010, 09:19 PM | #5 |
Captain
82
Rep 698
Posts |
Damn, someone must have dicked up bad. I literally jumped my car over a 8 inch plus median at around 40 mph and luckily nothing broke on mine.
__________________
'16 BSM 340i M Sport + Track Pack.:.M Perf Exhaust.:.Polished BBS RS-GT.:.JB4.:.BMS Intake.:.H&R Sport.:.
|
Appreciate
0
|
12-04-2010, 01:19 AM | #6 |
Needs FI
6
Rep 73
Posts |
I got the car as a CPO and the carfax was clean.
The damage was to the trailing arms. I have pictures of what I was shown when I went back to the garage. Does this look like damage that can happen while on the car? They said it would take 6 hours to fix. I have seen videos of bushings being replaced and it seems pretty straight forward. The garage seems shaddy and I have my doubts. |
Appreciate
0
|
12-04-2010, 09:07 AM | #7 |
Captain
42
Rep 632
Posts |
The part all chewed up with the metal sleeve is from the front of the trailing arm, the RTAB that gets upgraded all the time. What is that other part though, behind the RTABs? A Ball joint gone to hell or one of the bushings on the control arms ("wishbones" per RealOEM).
The RTABS are really chewed up, but that could have been secondary to that other part going bad first. There must be more to the picture - when RTABs fail, I haven't heard of them going like this anyway....
__________________
|=.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-.=| Silbergrau A08 / Sepang Brown LSD6 / Carbon Leather 4MY (1 of 3, this combo) RAC RG63 | Conti EC-DW | GC/Koni-Dinan | Rogue RSM | Arqray | Autosolutions | BMW brace | Pinnacle tint |
Appreciate
0
|
12-05-2010, 03:02 AM | #8 |
Needs FI
6
Rep 73
Posts |
The parts behind were the bushings on the control arms.
I'm just trying to figure out if the damage shown was possible from the car. Thanks for the help so far everyone. |
Appreciate
0
|
12-20-2010, 04:42 PM | #9 | |
Midlife Crises Racing Silent but Deadly Class
1820
Rep 5,337
Posts
Drives: 2006 MZ4C, 2021 Tesla Model 3
Join Date: Oct 2007
Location: Welcome to Jamaica have a nice day
|
Quote:
Those trailing arm bushings are not the most durable parts BMW has ever made/designed. In fact, it's been problematic since the 1980s and on the E9Xes BMW ditched the trailing arms. What you are seeing, is the damage from the removal process, without the proper tools the best way to remove the trailing arm bushings is to cut them up and push them out destroyed like that.
__________________
Sitting on a beat-up office chair in front of a 5 year old computer in a basement floor, sipping on stale coffee watching a bunch of meaningless numbers scrolling aimlessly on a dimly lit 19” monitor.
|
|
Appreciate
0
|
12-21-2010, 12:26 PM | #10 | |
Brigadier General
218
Rep 4,726
Posts |
Quote:
OP what EXACTLY are the bushings in the back, I have never even seen those before and there are no real bushings on the rear axle besides the RTABs the rest are ball joints except where the upper and lower control arm meet the subframe, but those are much smaller..... You made it sound like an arm broke in half. Either way, this should not be taking 6 hours, unless the shop has no idea what they are doing (which they obviously don't based on the bushings)
__________________
|
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|