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  #1  
Old 06-20-2012, 10:14 AM
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What will happen if the X stands on a deflated air spring strut?

Hi there! Just wonder what will happen if the X stands on the air spring strut without proper inflated, but not be driven? Will the damper inside the air spring be damaged? If it happens, is it a must to replace the whole air spring strut? Thanks for advice.
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Old 06-20-2012, 10:35 AM
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Nothing. It should be fine.
There is a rubber stop inside that keeps it from totally bottoming out even when deflated. I replaced both of my front bags with Arnotts and had no problems. Driving it would not be advisable.
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Old 06-20-2012, 10:50 AM
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The air bag shouldn't be left in that postion for too long because over the life of the bag it's inflated to basically one shape. when it's deflated it's in a different shape.
As the bag ages, the rubber gets hard and inflexible. When the bag is resting in it's new shape for an extended period of time, it could lead to cracking...

EDIT: you Can replace just the air bag on the front strut but it's a PITA and if there is any fluid leakage in the strut itself then that would need to be replaced anyway. It's better to just replace the whole strut from Arnott. It comes with a really good warranty.
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Old 06-20-2012, 11:07 AM
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Quote:
Originally Posted by sockethead View Post
EDIT: you Can replace just the air bag on the front strut but it's a PITA and if there is any fluid leakage in the strut itself then that would need to be replaced anyway. It's better to just replace the whole strut from Arnott. It comes with a really good warranty.
I was assuming the reason he is deflated is due to a bad bag, so leaving it flat for a few days wouldn't matter much as far as having it crack further.
I didn't find the airbag replacement to be a problem at all. In fact it's super easy. If you have already gone through the trouble of removing the wheel, tire, and strut assembly, swapping out the bag only takes about 5 more minutes. The instruction sheet from Arnott is very detailed with pictures and can be downloaded/viewed on their site.
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Old 06-20-2012, 09:18 PM
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Originally Posted by PUREVIL View Post
I was assuming the reason he is deflated is due to a bad bag, so leaving it flat for a few days wouldn't matter much as far as having it crack further.
I didn't find the airbag replacement to be a problem at all. In fact it's super easy. If you have already gone through the trouble of removing the wheel, tire, and strut assembly, swapping out the bag only takes about 5 more minutes. The instruction sheet from Arnott is very detailed with pictures and can be downloaded/viewed on their site.
No. In the fact, I replaced all front air struts with brand new oems, but I did not properly inflate the new air bags before I had the X down on floor. I then started the engine, the X inflated the air bags itself. According to the BMW TIS, it says the vehicle cannot stand on floor with deflated air bags, otherwise, the air bags or the struts must be replaced. That's why I am afraid of damaging my new air spring struts without properly inflated the air bags before having the X stand on floor.
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Old 06-21-2012, 12:07 AM
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Well, that's what I get for assuming...
If the bags are now inflated, I'd run it. I had my doubts about reusing my strut after driving on an deflated bag but it was fine and still is 10k miles later.
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Old 06-21-2012, 12:18 AM
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Originally Posted by PUREVIL View Post
Well, that's what I get for assuming...
If the bags are now inflated, I'd run it. I had my doubts about reusing my strut after driving on an deflated bag but it was fine and still is 10k miles later.
I just called BMW service center to confirm this, they told me that it would be ok if the X had not been run under situation that the air springs were deflated. However, if the X had been run when deflated, the shock strut might be damaged, then they must be replaced.
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Old 06-21-2012, 02:14 AM
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Quote:
Originally Posted by PUREVIL View Post
I replaced both of my front bags with Arnotts and had no problems.
Isn't the Arnotts stuff refurbished OEM?
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Old 06-21-2012, 03:16 AM
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Isn't the Arnotts stuff refurbished OEM?
I guess Arnott uses new rubber to make the air bags and put it onto the old BMW shock struts they received from return of buyers or somewhere else.
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Old 06-21-2012, 12:53 PM
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Quote:
Originally Posted by rogerkiu View Post
I guess Arnott uses new rubber to make the air bags and put it onto the old BMW shock struts they received from return of buyers or somewhere else.
I spefically asked them if they rebuild the strut as well as repalcing the air bags. They said that they do....
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