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Knocking Mini

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My Mrs JCW countryman has been making some unsettling knocking noises.
Coming from nearside rear.

We thought it was brakes as disks were looking pretty knarly like a bit of the pad had broken off so we've had them done (JCW part prices 😭).
She's just phoned to say it's back although not as loud.

It an odd one, of the car is sitting for a few days when she drives off it's like there is something in the wheel as it knocks in line with the speed of the car.
Tap the brakes and it seems to go. Driver regularly it doesn't appear.
No bearing like noises (it's low miles, no guarantee I know), and nothing looks untoward underneath.

Just speculating but a dry cv joint or something like that?

hello! poor Cooper has a sore leg?

the brake tap making it go kinda sounds like theres something catching?

is it a tap tap tap or a clunk?

could be a roll bar bush starting to show wear and mrs aspman is just so tuned in to the noises the car makes shes noticed early

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18 hours ago, mac11irl said:

hello! poor Cooper has a sore leg?

the brake tap making it go kinda sounds like theres something catching?

is it a tap tap tap or a clunk?

could be a roll bar bush starting to show wear and mrs aspman is just so tuned in to the noises the car makes shes noticed early


It is a tap tap tap and in line with speed so something related to the spinning parts on that wheel.

A dig around online did bring up suspension bushes as a possible candidate

i presume youve checked the tyre for debris stuck in a tread?

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1 hour ago, mac11irl said:

i presume youve checked the tyre for debris stuck in a tread?


Not specifically but been going on for a bit too long for that, plus wheel has been off for brakes in the last week.
Thought something might have been in the disk guard but again all that has been exposed and worked on recently.
That why I was thinking something relating to the drive shaft

On 17/04/2023 at 21:02, Aspman said:


It an odd one, of the car is sitting for a few days when she drives off it's like there is something in the wheel as it knocks in line with the speed of the car.
Tap the brakes and it seems to go. Driver regularly it doesn't appear.


Could it be surface corrosion on the disk? There will be a clear patch under the pads and as the edge of that hits the pad there will be a tap sound.

Perhaps accentuated by a sticky calliper not initially releasing the pad(s) fully.

On 17/04/2023 at 21:02, Aspman said:

It an odd one, of the car is sitting for a few days when she drives off it's like there is something in the wheel as it knocks in line with the speed of the car.
Tap the brakes and it seems to go.

Maybe a brake resin deposit on one disc?

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Discs are brand new now. Had them and pads done at the same time.

Knocking before brakes done, knocking after brakes done

Does it have a manual handbrake?

 

I'm just thinking that pulling it on gently, while moving, might enable you to feel anything 'catching', clean the faces of the discs and might answer Steve and Ken's suggestions, whether they're new discs and pads or not.

 

Pads loose and knocking in the carriers?

 

Otherwise it's surely got to be CV, wheel bearing (possibly one roller breaking down, then getting hidden as it gets greasy again), the shield or ABS ring.  Can't think what else it could be.

 

Would a suspension bush sound like it's rotational? I could understand it being speed related, but not a tap tap tap.  Does it do it if you bounce the car on the offending corner?

 

Gaz

Never rule out a fault with a tyres or even someone having put in tyre weld on gunk and it forming a ball of rubber that tumbles around in the tyre.   I have a T-shirt for that one.  

5 hours ago, toot said:

Never rule out a fault with a tyres

That’s a good call; on a previous car I was convinced a rear wheel bearing had gone, as were several more knowledgeable friends. Workshop could find no bearing fault - but did spot a tyre defect. New tyre, no ‘bearing’ noise.

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It’s got an electric handbrake 🙄

 

i will have a good look at the tire though. Typically it’s gone again now. 

On 17/04/2023 at 22:02, Aspman said:

Just speculating but a dry cv joint or something like that?

Isn't it FWD and not 4WD?

On 17/04/2023 at 22:02, Aspman said:

Coming from nearside rear.

 

  • Author

It’s a 4wd model.

 

All4 and JCW editions have 4x4

Edited by Aspman

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