bang from right rear

[Torque]

in the last few weeks my car developed a horrible banging noise, which comes from the right rear. it only happens after you straighten out coming out of a hard right turn. I have no idea where to look.

btw, I did take out everything (and i really mean everything) out from the trunk and the sound is still there

any help would be greatly appreciated.

car is a 07/90 m20 525ia (gb25203)

[Jr ///M5]

Rear subframe mounts, rear pitman arms...The pitman arms are easy to get to and check for play, the subframe mounts will require you to remove the brace in order to see the mount.

The pitman arms are easy to replace, the subframe mounts aren't, you'll need special tools, and even then sometimes they have to be cut out.

You can see the parts and their location at www.realoem.com

[Torque]

Thanks for your reply. I'll check it out next weekend when I get a chance to get the car on a lift.

[632 Regal]

is the jack loose?

[Torque]

is the jack loose?
I took the jack out too; carpet as well ... everything that I could unbolt/take out of the trunk area.

[632 Regal]

spare tire?

Im just hoping its something simple and stupid.

[misfortune]

in the last few weeks my car developed a horrible banging noise, which comes from the right rear. it only happens after you straighten out coming out of a hard right turn. I have no idea where to look.

btw, I did take out everything (and i really mean everything) out from the trunk and the sound is still there

any help would be greatly appreciated.

car is a 07/90 m20 525ia (gb25203)
Same story on my 89 535iM. Same exact thing.

[Bellicose Right Winger]

Need to figure out if it's drive line or suspension related.
Does it happen if you coast in neutral from hard right to straight?
Does it happen only after you apply power?
How old are shocks?

Paul Shovestul


in the last few weeks my car developed a horrible banging noise, which comes from the right rear. it only happens after you straighten out coming out of a hard right turn. I have no idea where to look.

btw, I did take out everything (and i really mean everything) out from the trunk and the sound is still there

any help would be greatly appreciated.

car is a 07/90 m20 525ia (gb25203)

[Torque]

spare tire?

Im just hoping its something simple and stupid.
lol, thanks for trying, but I really did eliminate everything that could move. Took out the jack, all the tools from the toolkit, the carpeting covering the jack and crap, jumper cables from under my spare, the spare itself, the big main carpet, everything.

it happens regarless of if i'm applying power or not. i dont know if it would do it in neutral ... not gonna risk messing up the tranny (stupid automatic) while troubleshooting something else.

The rear shocks were replaced in 2003, at 142,000 miles ... so not even 40k on them.

Misfortune, ... we have some misfortunes. lol

[calmloki]

Two guesses: a really bad constant velocity joint, giving you a rotational chunk chunk chunk as the bound balls jump, or a bad spider gear.. My E28 broke a spider and I couldn't figure it out until the spider came apart and I had to get trailered home. Dunno why the spider went, but it manifested itself for a couple weeks coming out of corners as a chunk with a braking feel - till it went bang with a braking feel. Took the spider in to the local dealership parts counter and demanded that they run it under warranty - after all, it only had a 1/4 million miles on it! Like having fun with them sometimes.
Maybe jack up the back and roll the tires over while feeling the axles by the CVs and watching for a jumping movement?
Tom

[Bellicose Right Winger]

If it bangs before you apply power, then there's no need to shift into neutral. This would seem to rule out a drive line problem.

My '93 525iM w/135k was banging intermittently after coasting thru a corner and re-applying power. It was worse when car was heavily loaded. CV joints or shocks I thought. I removed half-shaft, flipped it end for end, re-installed and it's been quiet ever since.

Paul Shovestul





......it happens regarless of if i'm applying power or not. i dont know if it would do it in neutral ... not gonna risk messing up the tranny (stupid automatic) while troubleshooting something else.

The rear shocks were replaced in 2003, at 142,000 miles ... so not even 40k on them.

[calmloki]

If it bangs before you apply power, then there's no need to shift into neutral. This would seem to rule out a drive line problem.

My '93 525iM w/135k was banging intermittently after coasting thru a corner and re-applying power. It was worse when car was heavily loaded. CV joints or shocks I thought. I removed half-shaft, flipped it end for end, re-installed and it's been quiet ever since.

Paul Shovestul
Yup - used to do that on the IRS bugs with worn CV joints - puts the stress on the other side of the valleys the balls ride in.
Tom

[Bellicose Right Winger]

Exactly, the surfaces that used to transmit the relatively light coasting loads now handle the driving torque.

Paul Shovestul


Yup - used to do that on the IRS bugs with worn CV joints - puts the stress on the other side of the valleys the balls ride in.
Tom

[632 Regal]

might want to inspect the rear differential bolts and mounts, my indi (fired) didnt tighten a bolt and at certain times it sounded and felt like something was going to fall off.

Check the muffler brackets and mounts, if loose it can swing around and hit the subfloor.

[wingman]

This is the RH rear pitman arm in stuffed condition. I'm in the early stages of your problem (hopefully all it is). From memory US$38 from BMA. DO NOT BUY FROM STEALER! Check the great info on www.bmwe34.net full photos and details.

http://i30.photobucket.com/albums/c301/wingman_1968/rearcontrolarmcopy.jpg

[pundit]

This is the RH rear pitman arm in stuffed condition. I'm in the early stages of your problem (hopefully all it is). From memory US$38 from BMA. DO NOT BUY FROM STEALER!...
What's wrong with you?
Don't you want to pay $248.00 AUD EACH from a friendly, local money grabbing stealer? ;)

I think we should submit a list of car parts price comparisons to 'A Current Affair' or 'Today Tonight'.
I mean these shows are really only sensationalist crap consumer beatups but hey... why not?

On second thought's it would probably cause the local stealers to lobby the government and get custom duty increased by 300% on any anybody importing parts that cost over $1.00!

[Torque]

Thanks for all the responses everyone. Unfortunatelly, I can't do much until next Saturday, but I will definitely look at everything you guys suggested. I'll post back when I do. :)