It seems that my back end when im going kinda slow like creaks like when it's going up and down and stuff
It sounds like a rumbling/vibrating sound or something and it's really random, it wont do it sometimes
also it makes this one sound that sounds like a metal bed squeeking or something
and it also does this random, and sometimes when I push on the back end of the car like it'll go up and down and make this sound
I can hear it in the rear end, it'll never do it when Im driving fast though?
it's a 93 btw 325is automatic
anyone know what this is?
And I have another question?
could this have anything to do with sub frame failure?
Im not exactly sure how u check for sub frame failure
or if you have sub frame failure will it always make that sound?
I mean I figured if your frame was about to fail, it'd always make that sound?
how do i check it just in case?
it seems to only make the sound after long distances, and It's really random, some days it will some days it wont?
get a mechanic to check your spring pads. its uncommon for them to shift but they do, my friends 328 had this happen and it made large noises over bumps, and if pushed hard into corners, driving straight it was not too noticeable though.
ati , first of all its so hard to diagnose a noise over the internet, we can only give you possible solutions , or possible problems, im not saying its anything because the noise(s) you have described may not sound like that to me in person, and it may sound much different outside the car, and also its too vast a problem.
your best bet is to go to a pro to get the proper solution, but with the knowledge you recieve on these forums you will be a bit more informed and can use this info for future referance and maintainace.
"get a mechanic to check your spring pads. its uncommon for them to shift but they do, my friends 328 had this happen and it made large noises over bumps, and if pushed hard into corners, driving straight it was not too noticeable though. "
you were talking about the springs though, not the subframe thing right?
and I would rather just look for myself, BUT I have no idea how to look at the subframe, I dont know where it is
A subframe problem will not make sounds... it is the frame ripping it self from itself... nothing more. Its a rip.. and if it is let to go over time... it will put more unplanned stress on other components... which will make them creak and probably sound and uneven bushing wear and tear... no sound...
Originally posted by 97alpineM3@May 26 2005, 06:43 AM A subframe problem will not make sounds...* it is the frame ripping it self from itself... nothing more.* Its a rip.. and if it is let to go over time... it will put more unplanned stress on other components... which will make them creak and probably sound and uneven bushing wear and tear... no sound...
Under hard acceleration, the initial flex would probably make a metal to metal slap sound of the subframe flexing and giving due to the tears, I read this some time ago in an E36 comon probs thread. I've never experinced it but this is what I have read.
I have a simlar problem to yours, my shock mounts are probably shot.
Since you have an automatic, it's less likely to occur due to driveline stress since the torque converter eases most all of the extremely hard torque transients. With a manual, the driveline is locked with the engine's crank, and if you lock it at different RPM speeds, it causes a jolt. This is more damaing to the subframe than the way an automatic transmission functions.
Yeah Um def dont have any metal to metal Slapping sounds, jsut that annoying vibrating/rattling noise
i noticed also that when I HIT my back seats with my hands, it kinda made the noise LOL
So what yall are saying is I should be fine right
and in case in the future I want to check, where do I look, I looked under my car, can u even see where it's ripping without taking anything out?
I saw where the struts (i thinK) went to the top, and the little bolted on circular thing attached to the frame? is that where it happens? or is it impossible to see unless u take shit off?
yea man, dont stress about the sub frame. Odds are it has nothing to do with your problem. I called around to several BMW dealers and asked how many times they had seen the rear-sub frame issue. 8 out of 10 said none and the other two said one or two maybe and the cars were heavily moddified. In 92 and 93 cars they are more prone to it, but it is not a common thing.. I would check the suspension componets- springs, shocks & mounts, and maybe bushings and also your brake pads can come loose and rattle around on bumps (like mine is doing now)..
But to check for sub frame problems look for tears in sheet metal. To fix the problem is a pretty big to do becasue you have to drop everything in the rear end to get to the sub frame.
I really did call around a few months back. I was concered as you were. I was ready to sell my car! But after furhter research- it is a problem area per say, but it isnt as common as you'd be lead to believe.. Now I have 17's, lowered, bilstein shocks and am loving it.. no signs of failure yet. Just lean back and enjoy driving the BM..
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