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  #13  
Old 05-30-2013, 12:33 AM
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Re: Can Suspension On-Board Compresor be used as Alt Air Compressor

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Originally Posted by Xjrguy View Post
Ok I geek out on the minutiae so your response is interesting if it's accurate.

Thanks.

It is accurate... Do you really think the system would be that tight that it would never need anything added? It's mentioned in the same literature that you quote just not in the section you posted. The only thing I always wondered about is they say it requires class 5 nitrogen. Are the filters on the intake really cleaning up the air the much?
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Old 05-30-2013, 12:02 PM
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Re: Can Suspension On-Board Compresor be used as Alt Air Compressor

I found this here:

Air suspension info

But there wasn't really any conclusive answers.

That makeup hose could be for the dealer to refill the system if there is was a leak.

I'm still not convinced this mixes outside air with the Class 5 Nitrogen already in the system. It would not be a "closed" system if it did.

An air conditioning system refrigerant line is closed and "that tight" and never needs any Puron or R-134 added unless there is a leak.

FYI, this isn't to start some sort of forum war, but this is a good discussion on a system that we should all have a better understanding on since someday it's going to fail and need fixing.
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Old 05-30-2013, 12:35 PM
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Re: Can Suspension On-Board Compresor be used as Alt Air Compressor

The text from the service manual:

" The air suspension compressor assembly does have a filtered air suspension hose assembly for adding air volume if a component of the system loses air pressure and is replaced. The compressor is not intended to replace the entire system air volume..."

I'm going to guess the class 5 refill requirement stems from the engineers wanting to have margin as the 99.999 % pure nitrogen gets diluted by the air make up.
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Old 05-30-2013, 01:44 PM
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Re: Can Suspension On-Board Compresor be used as Alt Air Compressor

Thanks.

The rest of the text also includes:

...There is a procedure for complete system fill using an external source if it is necessary; however, this should only be necessary if the air suspension compressor or air compressor valve block is replaced.

I read all of this in the context of what you posted and what is available to mean that the system IS CLOSED and that the filtered air suspension hose assembly is strictly for ADDING gas when the system is serviced or a component fails, venting the closed nitrogen to the atmosphere.

Nowhere does any text say that the system uses outside air for any reason.

There are specific servicing steps and system refill steps that need to be taken (including the Class 5 nitrogen point) Why would all this be required if the system could in fact use standard air?

I am still not convinced that the system draws in any outside air.
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Old 05-30-2013, 03:01 PM
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Quote:
Originally Posted by Xjrguy View Post
Thanks.

The rest of the text also includes:

...There is a procedure for complete system fill using an external source if it is necessary; however, this should only be necessary if the air suspension compressor or air compressor valve block is replaced.

I read all of this in the context of what you posted and what is available to mean that the system IS CLOSED and that the filtered air suspension hose assembly is strictly for ADDING gas when the system is serviced or a component fails, venting the closed nitrogen to the atmosphere.

Nowhere does any text say that the system uses outside air for any reason.

There are specific servicing steps and system refill steps that need to be taken (including the Class 5 nitrogen point) Why would all this be required if the system could in fact use standard air?

I am still not convinced that the system draws in any outside air.
What is the use of the compressor then? What others have said is correct.
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Old 05-30-2013, 03:29 PM
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Re: Can Suspension On-Board Compresor be used as Alt Air Compressor

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Originally Posted by 2005JGC View Post
What is the use of the compressor then? What others have said is correct.
I would imagine the compressor is there to shift the necessary quantity of nitrogen from the holding tank to/from the air shocks to adjust height, no?

Again, not here to incite a riot, there is a lot of information that conflicts about how this system works.
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