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View Full Version : I solved my clunking noise



stephenkirsh
07-28-2015, 08:36 PM
Posting this incase anybody in the future has a weird clunk they can't figure out.

I had an odd clunk for quite a while. At first I thought it was suspension related, since it wasn't related to engine speed or vehicle speed. After poking all over the car for months, I gave up and took it to a mechanic.

Dunno why I didn't catch this before, but it turns out the engine mounts were shot and the trans mounts were completely separated. I knew the engine mounts were bad, but never thought to check the trans mounts.

My guess is that the clunk is from the transmission itself. I could feel it clunking through the floor boards. The clunk would only ever happen when the engine was under neutral load (meaning it wasn't accelerating or decelerating), which means there wasn't any torque on the two trans bushings, allowing the whole driveline to bounce.

No damage to anything else. Replaced with M3 engine & trans mounts. Good to go. Car feels great.


https://www.youtube.com/watch?v=VJ8y6wdH9v4


https://www.youtube.com/watch?v=VJ8y6wdH9v4

BMWCurves
07-28-2015, 09:53 PM
Nice, glad to hear you solved your problem. Couple of q's:

1. Do you have part numbers that you used for engine and trans mounts?
2. Did you replace them yourself?
3. If so, how difficult were they?

Thanks for the video, definitely a very clear example of your clunk.

ELCID86
07-29-2015, 10:28 AM
I found and ordered this kit from ECS. https://www.ecstuning.com/ES2593140/

Have not installed yet.


Thumbs, iPhone, TaT.

stephenkirsh
07-29-2015, 03:44 PM
Nice, glad to hear you solved your problem. Couple of q's:

1. Do you have part numbers that you used for engine and trans mounts?
2. Did you replace them yourself?
3. If so, how difficult were they?

Thanks for the video, definitely a very clear example of your clunk.

I had a shop do it so I don't know part numbers. They're OEM M3 parts, so you can look it up on ECST or real OEM.

In terms of difficulty, I hear it's relatively easy.

BMWCurves
07-29-2015, 04:25 PM
Thanks for the info. My clunking is getting worse but I have to get under the car to see if my diff mounts are shot and so forth.

stephenkirsh
07-30-2015, 03:25 PM
Yea check all the drive line and suspension mounts.