996TURBO
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new air springs
- Thread starter sarstad
- Start date
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If your system with new GenIIs does not deflate when left standing there is nothing wrong with valve block. Your problem is lack of air pressure. Replace piston seal and cylinder first. If pump is working correctly you would need a serious valve block leak to stop tank from filling. If you have carried out the tests outlined earlier and found things ok, it is unlikely to be a valve block problem. Apart from airline connections and the tank itself, after air has passed NRV1 if that is sound there are too many things that have to leak all at the same time to cause your tank to depressurise. Renew the O rings if you wish. But i am confident your problem is a weak compressor.
996TURBO
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I'm sorry but the fact that the car do not deflate when left standing do not prove at all the valve block is leak free.
A melted airline to the tank can cause a low leak. Of course no leak except a major one will prevent the compressor to build up pressure but any leak will depressurise the tank overnight.
Compressor will have to work harder than normally. I've seen some of those being shot in 6-8 months when normal lifetime is more 8-10 years.
If prefer a weak compressor in a leak free system rather than a strong compressor in a leaky system.
Cost less.
Last edited:
sarstad
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i have the same thorough so i will start with changing the compressor seal
then if it still is the same i will change the o rings on the valve block
sarstad
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I'm sorry but the fact that the car do not deflate when left standing do not prove at all the valve block is leak free.
If prefer a weak compressor in a leak free system rather than a strong compressor in a leaky system.
Cost less.
but then haw do i test the valve block ??
996TURBO
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That's the problem of valve block diagnostic.
You can test with soapy water all the airline ports, 5/7 valve block solenoids (upper ones) so 30 o-rings and that's it but this is not enough because there's something like 42 o-rings in a block and you can't test the rest on the vehicle.
From experience and knowledge, those o-rings maybe worn out after 5-10 years.
For the cost of an o-ring kit, i wouldn't risk any brand new compressor
sarstad
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I'm sorry but the fact that the car do not deflate when left standing do not prove at all the valve block is leak free.
If prefer a weak compressor in a leak free system rather than a strong compressor in a leaky system.
Cost less.
It proves that the air bags are sound, the lines to them from block, also the four valves to the air bags are not leaking that's a big start. If he carried out the checks i outlined and found things ok it proves that the air inlet side is not leaking, that leaves the four O rings in the NRV block and NRV1. A good compressor is fundimental to operation. Get good air pressure then look for leaks. It's difficult finding leaks without air pressure. Nothing wrong with changing O rings but it's not the first thing to do if your suspension is playing up.
sarstad
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i start with the compressor .
do i have to de-pressurised the system when i take the compressor out
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No just take it out and do what you have to do then put it back. By the way did you do the finger blow off test as i suggested what did you find?
sarstad
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that i forgot i go do it at one´s
996TURBO
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You're totally right. Problem is many people believe they cured the problem with a compressor only. Then they stop here. In few months, they'll complain about having screwed a compressor and saying EAS is unreliable...
There's no better way to test air inlet side except with a air gauge and a tee fitting on the number 6 line
sarstad
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don an i can easily keep my finger on the output of the compressor
996TURBO
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Do the same test with the input?
Does it suck your finger a little? or can you feel some blowing air (non return valves shot)?
sarstad
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- Torkilstrup (Denmark)
996TURBO
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- 579
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sarstad
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- Torkilstrup (Denmark)
nob how ??
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Then you need to take a look inside it. Inspect piston cylinder, also valves. Set them up as i have described.
sarstad
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At this stage why would he want to test thermal cut out. One step at a time first thing to do is get compressor pumping air. Don't over complicate things.
