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  #1  
Old 02-04-2019, 06:55 PM
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Clicking sound from right rear

I hope I can accurately describe this. I'm having an issue that I can't seem to track down.

2006 3.0i and I get this "clicking" from the right rear that comes and goes. I say clicking but it's not really a click. It almost sounds like some is taking a paper cup and tapping the bottom of the cup with a pencil. It's a "pop pop pop". Almost like the problem you used to hear it classic cars when the speedometer cable was dry. Like something that is bound up and then lets go causing a pop. It's not super loud and it goes away under 20 mph or so. It does change cadence but it doesn't always appear to follow the speed of the car but I could be wrong about that detail.

It comes and goes from time to time.

What I've done is pull the rear wheel off and look for anything obvious. I can't see any signs of anything rubbing. I pulled the rear brakes off, cleaned and lubed everything and put them back together and adjusted the right rear. It was so loose it wasn't hitting so I thought I had found the issue. I put it all back, test drove it. Dead quiet. Then, the next day, it was back. When it's doing it, if you pull up the parking brake slightly, the noise doesn't stop.

If you go around a curve, for the most part, it goes away when there's a load to the side. If you put the regular brakes on lightly, it doesn't stop.

I've pulled most everything I can see apart, aside from the axle itself.

Anyone got any idea at all?
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Old 02-06-2019, 08:31 AM
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Side loading changing the sound usually points to wheel bearing. That said if slow period, usually would mean something is getting hit once per revolution. Rust patch on rotor hitting the brake pad, inside of rotor hitting something inside the dirt guard (that's happened to me). Something on the CV axle hitting once per rev.
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Old 02-07-2019, 08:56 AM
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Thanks for the thoughts on it. Are wheel bearings pretty easy on the X5? I've pulled the brakes all off and I can't see any indication of anything rubbing. It really is an odd sound. Kind of a hollow sound, like two pieces of wood hitting each other.

I guess the next step is pulling it down that much further.

Thanks for your input.
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Old 02-07-2019, 03:11 PM
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The sound I'm thinking of would be behind the rotor. If there is a bump of rust on the rotor that hits the dust shield behind the rotor.


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Old 02-07-2019, 05:16 PM
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I suggest looking at the brakes on that side again. See if you can make it go away again. Could be a caliper piston issue
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Old 02-26-2019, 09:12 AM
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I've been working on other things on this car lately so this one has slipped behind. I pulled the wheel off again (3rd or 4th time now) and I cannot see any issues at all with the brakes or emergency brake system. However, the sound is far less random now, happening almost all the time and getting louder.

To me, it sounds very much like a CV Joint issue, pop..pop..pop..pop..pop..

I've ordered a replacement assembly so we'll give that a go. Not much else in that area to check. Brakes are fine, wheel bearing seems smooth, not sure what else there is that could make the noise other than the CV joints.

Has anyone seen documentation for replacing a rear CV joint (axle and everything). I see a Youtube video of someone changing one on a X3. I also see one one the X5 but it looks like it was far more difficult than what the X3 guy did.

On the X3 video, the guy just unbolted it at the differential, took the wheel bearing nut off, and then lowered the rear wheel suspension and the shaft pulled out of the differential and then out of the hub. Seemed very simple. On the X5 video I watched, they pulled a fair amount of the parts off the hub assembly, suspension wise. Seemed like that was considerably more difficult. They might be 2 totally different setups, I don't know, never seen the X3 and haven't been under my X5 since I watched the videos.

Stay tuned
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Old 02-26-2019, 10:05 AM
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There is a good video for rear bearing where the main suspension is dropped to get to the E14 bolts to remove the bearing. It's probably the best way to make room rather than the typical home brew methods I've seen (usually involves cutting the exhaust hangar).

https://youtu.be/kyHghlHcpA0

Note: do not use slide hammer to remove hub unless you are changing the bearing! Skip that step, put some penetrant in the hub spline and knock the whole hub off with the bearing once the E14s are removed.

You can remove all the E14s without dropping the suspension using some flex joints for bearing replace but you won't have room to get the CV out.

Take off the hub you might be able to work the CV out by unbolting at the differential depending which side but the examples I've seen required lowering the exhaust so I think the suspension drop method is easier. If you leave the inboard bolts (adjusting) you won't need to re align.

https://youtu.be/Ns17pnS-bG4

Here is an example of how to with E70.

Combine the two you should have some decent how to. It looked like there is enough motion in the hub carrier to extract the CV without removing the bearing but it's just 4 E14 bolts to remove the bearing with the hub so if you can't clear the CV spline from the hub I would remove them and pull the hub out.
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Old 02-26-2019, 10:10 AM
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The X3 example looked easier because you can unbolt the exhaust to drop and the X5 it's welded (or all the guys cutting or bending the hangars to drop the exhaust are morons).

With the right tools and especially if you have air suspension so don't have to deal with compressing the spring, it's realky just like six giant bolts to remove to drop the suspension and do the job the official method.
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Old 02-26-2019, 01:08 PM
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Thanks Andrew, much appreciated! The parts won't be here until this time next week so I'll have a little time to put it all together in my mind and gather the appropriate tools.
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Old 02-26-2019, 02:10 PM
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The single best tip I have for changing a CV axle is that you should have the Hub or the knuckle loose when you install the spline into the hub: if it's already tightened down it will bind and it'll be ten times more difficult to install the spline into the hub.
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