AlexB 24 Report post Posted April 2, 2022 Hi all, A mate of mine recently purchased a z4, upon the first week or so of driving he noticed an unusual noise coming from rear left corner, Slowly getting worse and worse. Can’t really describe the sound other than someone having a duck in a chokehold 🤣. Only starts at around 60kms wheel speed, then you can kind of drag it down to 45 before it goes away. Very unusual. Trying to see if anyone here has had a similar situation and managed to fix it, before we tear into a wheel bearing replacement, since vid was taken we have stripped the corner right back to just the hub so not brake related. Any help or advice greatly appreciated! Cheers IMG_1009.MOV Quote Share this post Link to post Share on other sites
Twistee 453 Report post Posted April 2, 2022 Wow, I had a headset on and watched that on my phone... Almost crapped myself when the duck tromboned into life. It doesn't ramp up, the duck just arrives. Interested to know what that is as well. Good luck. Quote Share this post Link to post Share on other sites
Jacko 2154 Report post Posted April 2, 2022 Just the hub with no drum brake? Quote Share this post Link to post Share on other sites
AlexB 24 Report post Posted April 2, 2022 2 hours ago, Twistee said: Wow, I had a headset on and watched that on my phone... Almost crapped myself when the duck tromboned into life. It doesn't ramp up, the duck just arrives. Interested to know what that is as well. Good luck. Certainly gave us a fright while laying under the car with the wheels doing 60! Quote Share this post Link to post Share on other sites
AlexB 24 Report post Posted April 2, 2022 2 hours ago, Jacko said: Just the hub with no drum brake? Yea, had it right down to just the arm/bearing housing. Even pulled the heat shield of in case it was interfering somehow, still there! Quote Share this post Link to post Share on other sites
jon dee 500 Report post Posted April 3, 2022 If you put the rotor on and turn the axle slowly by hand, do you feel any vibration ? Not roughness, more like the vibration you get when you slowly open a squeaking door for the ghost house effect. Does one axle feel tighter/stiffer to rotate than the other ? Cheers... Quote Share this post Link to post Share on other sites
AlexB 24 Report post Posted April 3, 2022 36 minutes ago, jon dee said: If you put the rotor on and turn the axle slowly by hand, do you feel any vibration ? Not roughness, more like the vibration you get when you slowly open a squeaking door for the ghost house effect. Does one axle feel tighter/stiffer to rotate than the other ? Cheers... Tried that, both axels feel the same and no noise or creaking happens at slow speed or turning by hand. Wheel bearing is silent while running. Couldn’t even feel any vibration while the noise is occurring. Cheers Quote Share this post Link to post Share on other sites
jon dee 500 Report post Posted April 3, 2022 (edited) If I was a guessing man (and obviously I'm not) then I would guess that you have a dry lip seal in there somewhere. If you can find it, running a couple of drops of engine oil on the shaft and into the seal rubbing surface should make the sound go away. Cheers... PS: are you running a sweep on this Edited April 3, 2022 by jon dee Quote Share this post Link to post Share on other sites
dirtydoogle 383 Report post Posted April 3, 2022 That's more like a turtle having sex? Two likely things, that CV boot could be rubbing between the bellows, that makes a horrible noise. Or a very interesting failure of the wheel bearing Quote Share this post Link to post Share on other sites
AlexB 24 Report post Posted April 3, 2022 47 minutes ago, jon dee said: If I was a guessing man (and obviously I'm not) then I would guess that you have a dry lip seal in there somewhere. If you can find it, running a couple of drops of engine oil on the shaft and into the seal rubbing surface should make the sound go away. Cheers... PS: are you running a sweep on this We tried a quick spray of some basic CRC type oil (5-56 I think) on the CV boot and tried to get some onto the bearing seals, no different. Quote Share this post Link to post Share on other sites
AlexB 24 Report post Posted April 3, 2022 13 minutes ago, dirtydoogle said: That's more like a turtle having sex? Two likely things, that CV boot could be rubbing between the bellows, that makes a horrible noise. Or a very interesting failure of the wheel bearing Cant say I know what turtle sex sounds like, but that's certainly what I imagine. We are probably going to go down the route of bearing failure because it sounds closer to that region. maybe give it a few "accidental" Scandinavian flicks to see how it likes a bit of action before finding special tools for the job etc. after all, the previous owners both had it as a weekend car and they were both of age so I imagine its had an easy life. 1 Quote Share this post Link to post Share on other sites
dirtydoogle 383 Report post Posted April 3, 2022 I would be leaning towards wheel bearing. Angular contact bearings do some real strange stuff sometimes Quote Share this post Link to post Share on other sites
jon dee 500 Report post Posted April 15, 2022 On 4/2/2022 at 9:29 PM, AlexB said: Hi all, A mate of mine recently purchased a z4, upon the first week or so of driving he noticed an unusual noise coming from rear left corner, Slowly getting worse and worse. Can’t really describe the sound other than someone having a duck in a chokehold 🤣. Only starts at around 60kms wheel speed, then you can kind of drag it down to 45 before it goes away. Very unusual. Trying to see if anyone here has had a similar situation and managed to fix it, before we tear into a wheel bearing replacement, since vid was taken we have stripped the corner right back to just the hub so not brake related. Any help or advice greatly appreciated! Cheers IMG_1009.MOV Did you solve this mystery ?? Cheers... Quote Share this post Link to post Share on other sites
