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Thread: Rear suspension leak

  1. #1
    Join Date
    Jan 2017
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    Rear suspension leak

    My car has new compressor, bags, solenoids, and air line. Still losses air when car is off. Everything is good when car is running. Help!!!

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  2. #2
    Join Date
    Jun 2011
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    Spray everything with soapy water when aired up. Gotta be a leak somewhere. The air fittings on solenoid iirc are pushlock and if not seated fully will leak
    2004 SB Ported Trilogy 48
    Has supporting mods and stuff
    Thanks to Marty O for his help in updating this car.

    R.I.P.
    Rex "SC Cheesehead"

  3. #3
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    Thanks I will try that. Are those O rings in the solenoid air fittings?

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  4. #4
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    I may be stating the obvious or am not understanding the problem, but the air suspension system 'vents' after x amount of time when the car is just sitting...this may be the reason for your loss of air when the car is off.

  5. #5
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    Yes I agree but she is flat on her butt after a short time of car off. Never did dat before but thanks

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  6. #6
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    I don't know the answer about o rings in the solenoids. Based on your description I think it is an air leak,either bags, lives, solenoids. I don't think this would be it, but check air ride height sensor on watts link to rear axle
    2004 SB Ported Trilogy 48
    Has supporting mods and stuff
    Thanks to Marty O for his help in updating this car.

    R.I.P.
    Rex "SC Cheesehead"

  7. #7
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    Yup changed that too. I'm convinced it's at the solenoid o rings

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  8. #8
    Join Date
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    yes new bags come with new o rings for the solenoids, small for the solenoids, large for where it enters the bag. use soapy water and the leak can be anywhere.
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  9. #9
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    Still checking for leaks nothing yet. Must be super slow.

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  10. #10
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    Rosemount, MN
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    Is there a check valve in the system maybe after the compressor to prevent it from leaking back down when the compressor is off? Or maybe it's built into the compressor?

  11. #11
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    Quote Originally Posted by str8pipe View Post
    Yes I agree but she is flat on her butt after a short time of car off. Never did dat before but thanks

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    Quote Originally Posted by str8pipe View Post
    Still checking for leaks nothing yet. Must be super slow.

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    Visible confusion...

  12. #12
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    I replaced bags and solenoids using aftermarket parts and i went through hell because orings supplied with the Dorman solenoids were the wrong size. I ordered two sets of orings from McMaster-Carr but i dont remember which ones fit.

    https://www.mcmaster.com/catalog/1295N238

    https://www.mcmaster.com/catalog/9263K178

    There was only .5mm different in ID between the two and it made a difference.
    2003 Black - sold, back again, and sold
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    2003 Black - shitbox

  13. #13
    Join Date
    Jan 2017
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    New York
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    Thanks guys Still no soap bubbles. Gonna change O rings next. So frustrating

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