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  #11  
Old 05-19-2019, 11:33 AM
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Quote:
Originally Posted by Ohsoslow View Post

Just need to make a removal tool after work this week.

PM I'll measure mine for some dimensions.

I've been meantime to do the same for the front and rear axle bearings. It would be pretty easy to roll your own once you know some dimensions.
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  #12  
Old 05-19-2019, 12:03 PM
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Originally Posted by kmm111 View Post

Make sure you pull the air pump fuse first, or disconnect the battery.

The computer will disable the air system when it thinks the car is on a lift eg once the wheels are past some point low it realizes the only possibly is wheel is dangling for tire change etc.

With air out of the bag it's conceivable you could lift the wheel high enough to kick on the air but even if you did it would just hiss a bit until you lowered it back down.

I've seen todo instructions that do not include pull the fuse but you'd have to remove the air fitting after getting the car lifted.

I need to remove my air pressure to check my rear joints to see what needs replacing back there. My camber Is at Max spec and id rather have it closer to min spec. Before I just crank the camber adjust to the limit to compensate I'd rather replace the worn part/a that caused it.

I will try without removing the fuse and report back. I will have the fuse puller on the fuse in case I need to pull it but I'm confident it doesn't need to be pulled.
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  #13  
Old 05-20-2019, 02:10 AM
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Originally Posted by kmm111 View Post
The hardest part of replacing the control arms &/or ball joints on a coil spring suspension is getting the bolt holes to line backup while fighting the suspension tension. Youll want really big pry bars or ideally someone to help you hold & leverage the suspension into the proper place. Obviously compressing the cool spring will also help but I personally do them without doing that. As for the OPs question, bleeding the air bags down is stupid easy. Remove the rear cargo cover & sub covers & loosen the 2 air line fittings. Make sure you pull the air pump fuse first, or disconnect the battery.

Righto thanks, are we saying it is impossible to replace those bushes on a car with air suspension without bleeding the some air from the system? just concerned am going in for bush change and ending up with sagging suspension....word is mechanic i am off too which is not my usual one is competent, like i said got outer tire wear on one side off, previous alignment etc pointed to thsoe ball joints being an issue so am going to get bushes replace, tires replaced and then get the alignment done see if it improves life of tires, 6miles is too soon to warrant replacement to be frank...and aint cheap either
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  #14  
Old 05-21-2019, 06:16 AM
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Originally Posted by omodos View Post
Righto thanks, are we saying it is impossible to replace those bushes on a car with air suspension without bleeding the some air from the system? just concerned am going in for bush change and ending up with sagging suspension....word is mechanic i am off too which is not my usual one is competent, like i said got outer tire wear on one side off, previous alignment etc pointed to thsoe ball joints being an issue so am going to get bushes replace, tires replaced and then get the alignment done see if it improves life of tires, 6miles is too soon to warrant replacement to be frank...and aint cheap either
Im not saying its impossible. But for the 5-10 mins it takes to bleed out the bags the job is so much easier than inflated why would you try?
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  #15  
Old 05-21-2019, 07:13 AM
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Just call me paranoid and worried that if they do release air they then don't tighten back up correctly I end up with sagging rear suspension and/or suspension errors on dash....2 mechanics I spoke to (one a bmw specialist) both said if all goes well in 1 day max will have them replaced and car sent for alignment....there is also a chance they are hard to remove....didnt ask them if they had this special clamp/vice used to ease them out.....and for that matter viewing the odd car diy on tv, i have seen these type of joints being eased out with the use of a diy trick, passing a long bolt with a nut on one side and washer and appropriately sized socket attachment on the other end and tightening a second bolt to other end and voila....optimistic?
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  #16  
Old 05-21-2019, 08:29 PM
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If the shop specializes in BMWs they should have the tool. I guess you can rig up stuff, but you can buy the tool on amazon for $47.99, so Im not sure why you would bother at that price point. I live in the rust belt & have done over 12 sets of those ball joints. The only problem Ive had removing them is with the snap ring. Once thats out they are very easy to replace with the ball joint tool. When you release the air from the shocks, your unscrewing the air feed lines. When your done, you just screw them back in. I work on a lot of BMWs & Ive never had one leak from there after.
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  #17  
Old 05-22-2019, 05:15 AM
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Originally Posted by kmm111 View Post
If the shop specializes in BMWs they should have the tool. I guess you can rig up stuff, but you can buy the tool on amazon for $47.99, so Im not sure why you would bother at that price point. I live in the rust belt & have done over 12 sets of those ball joints. The only problem Ive had removing them is with the snap ring. Once thats out they are very easy to replace with the ball joint tool. When you release the air from the shocks, your unscrewing the air feed lines. When your done, you just screw them back in. I work on a lot of BMWs & Ive never had one leak from there after.
Ok fella appreciate reply, what about andrewynns earlier note that when the wheels are off the ground the pressure is lowered in the air suspension as car knows it is dangling in mid air? i'll pass by your suggestions to mechanic, so far has been very competent with x5 and wifes e46, was just the fact that the words " if all goes well" were thrown into reply when i asked how long to get it done was what got me anxious...
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  #18  
Old 05-22-2019, 09:24 PM
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Originally Posted by omodos View Post
the fact that the words " if all goes well" were thrown into reply when i asked how long to get it done was what got me anxious...
Hell, be glad you're not in the Middle East as they always say "inshalla" which means if God wills it....

Yep warm fuzzies all the time.

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  #19  
Old 05-24-2019, 05:45 AM
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I've done this at home on the driveway - I'm pretty sure there was no need to remove the airbag - but I have also had to remove the rear hub and hence deflate the airbags before - and that process plus reinflation is very straightforward. Releasing the pressure is extremely easy - the pipe unions are only on 5nm tight or so - so no force required - and very unlikely to leak (as the unions are in the boot of the car, underneath the boot covering - so will not have corroded)). Am sure it'll be fine!

Just don't follow the You Tube guide where a workshop guy does it "with no special bmw tools needed" - he smacks the sht out of it with a club hammer!!!!!!! If you crack the hub carrier then it's a lot more work to replace (handbrake cable is a bit of a bgger to remove as they corrode in pretty tight).

To reinflate the air bag - this should be done with the car in the air using INPA/DIS etc - or else you can VERY gently and slowly/stage by stage lower the car with the engine running and it should gradually fill the airbag back up (I've not had much success with the latter method though and end up using DIS/INPA!). The level sensor arms are easy to put on the wrong way round (they have a ball joint/arm which can flip backwards - and that'll cause an error and the suspension to stop working - you just flick it back through it "ark of motion" to reinstall full operation - get the workshop to take photos before they remove them if they're not sure what they're doing. It's a silly and easy mistake to make (which I've done several times...).
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  #20  
Old 05-24-2019, 05:50 AM
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Originally Posted by deepblonde View Post
I'm faced with having to do this job, and control arms etc ,
and it seems to me that the spring is pushing down,

and so I wish I had air suspension so I could release the air and make it easy to move every thing around,
so I'm not looking forward to it...
Good luck fella, it is something i could never tackle myself either with air springs or not, hope my man costa will be up to it...
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