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Thread: Occational Thumping Noise

Started 4 months, 2 weeks ago by bigmansM
Okay, here is the update. I change the wheel to the spare tire and that didn't stop the problem. I then made some steel sheet metal muffler hangers (happy with those) to replace the torn stock ones, and that didn't help at all either. Im going to try and get some video, more for the audio so you can hear the noise. I would really prefer to get this issue fixed myself but, I might ...
Site: Bimmerforums - The Ultimate BMW Forum  Bimmerforums - The Ultimate BMW Forum - site profile
Forum: M3 Series (E36)  M3 Series (E36) - forum profile
Total authors: 6 authors
Total thread posts: 26 posts
Thread activity: no new posts during last week
Domain info for: bimmerforums.com

Other posts in this thread:

Balthazarr replied 4 months, 2 weeks ago
Quote: Originally Posted by bigmansM U dont have tires on the old wheels but I have put the spare on the side that seems to be make noise and that didn't help. Checked that. no cracks. And the noise doesn't seem to be suspension related. ...

bigmansM replied 4 months, 2 weeks ago
Quote: Originally Posted by Balthazarr So, you let the suspension droop and the noise abates for a while. Guess what? Check the subframe bushings and your other suspension from the underside. subframe bushings are brand spanking new. I looked at the body/chassis where the subframe mounts and never saw any ...

Balthazarr replied 4 months, 2 weeks ago
Quote: Originally Posted by bigmansM subframe bushings are brand spanking new. I looked at the body/chassis where the subframe mounts and never saw any cracks at all. Shock towers top and bottom look good. I can take pictures if you think that would help. But I hope the video will trigger a response from someone who had a similar ...

bigmansM replied 4 months, 2 weeks ago
Quote: Originally Posted by Balthazarr Maybe you don't have the bushings tightened enough? I remember other problems you had with your car and it usually turned out to be an installation error. One in particular was your SSK. I installed the subframe and rtab's 3 years ago and havent had an issue since. I ...

Balthazarr replied 4 months, 2 weeks ago
Quote: Originally Posted by bigmansM I installed the subframe and rtab's 3 years ago and havent had an issue since. I will check again but again, this doesn't seem suspension related. Listean to the noise in the video and you should understand why. Notice with speed the noise changes its rate. It sounds like it is a noise every ...

bigmansM replied 4 months, 2 weeks ago
Quote: Originally Posted by Balthazarr Until I get a new set of earphones, I won't hear a thing. I'm on a library PC, atm. I'll see what's up tomorrow when I go to the VA. It's funny how my technical threads always become a conversation between the two of us. We haven't done this in a while. We should get ...

CamtainG replied 4 months, 2 weeks ago
have you checked out the driveshaft?

bigmansM replied 4 months, 2 weeks ago
Quote: Originally Posted by LuxoM3 Differential nose bushing... try accelerating and decelerating and see if you notice the bump. These last to about 100k miles so if you are close to that... well... I do hear a slight bump noise when I accelerate. Which one is the differential nose? Is that the one on the front ...

Balthazarr replied 4 months, 2 weeks ago
Quote: Originally Posted by bigmansM I do hear a slight bump noise when I accelerate. Which one is the differential nose? Is that the one on the front side of the subframe? Ill take some pictures and post them when I get a chance. I am over 100k miles. And I dont see any driveshaft and halfshaft issues. What is the purge ...

bigmansM replied 4 months ago
Okay, so the differential nose bushing is in great shape. No hairline cracks or anything. Subframe bushings are all tight. WHAT I DID FIND. The torx bolts that attach the halfshaft to the diff had loosened up. Some more than others. One was surprisingly loose, the other required a 2ft. break bar to tighten and alot of pushing from my end. So far NO NOISE. I am ...

 

Top contributing authors

Name
Posts
bigmansM
12
user's latest post:
Occational Thumping Noise - Page...
Published (2009-11-02 18:55:00)
Quote: Originally Posted by Balthazarr There's a definite difference in sound and degree of movement. I didn't know that much displacement was normal on either side, but the one side has more. So all I have done on the car is repack the large CV joint closest to the diff. with CV grease and install a new boot clamp. No noise yet, but it is not uncommon for me to drive the car for a week or more time without the noise so i am still...
Balthazarr
9
user's latest post:
Occational Thumping Noise - Page...
Published (2009-11-12 15:22:00)
Quote: Originally Posted by bigmansM So all I have done on the car is repack the large CV joint closest to the diff. with CV grease and install a new boot clamp. No noise yet, but it is not uncommon for me to drive the car for a week or more time without the noise so i am still skeptical. It will be very interesting to find out if the grease was really the problem. I hope it does, but where did the original packing go? It appears a...
CSwain
2
user's latest post:
Occational Thumping Noise - Page...
Published (2009-11-13 19:26:00)
I should add that there's no perceptable radial play at this point, and I don't see a big difference in axial play either...hopefully a repack buys a few miles!
CamtainG
1
user's latest post:
Occational Thumping Noise
Published (2009-08-11 00:07:00)
have you checked out the driveshaft?
gregmm6
1
user's latest post:
Occational Thumping Noise
Published (2009-08-24 12:44:00)
What thumping noise?
Badgtho is back
1
user's latest post:
Occational Thumping Noise - Page...
Published (2009-08-24 13:02:00)
i would give a close look to the driveshaft, the csb, the exhaust mounts and the diff & mounts.

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