new air springs

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sarstad said:
then shall i order the o ring set fore the valve block to ??
Click to expand...

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.
 
wammers said:
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.
Click to expand...

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.:cool:
 
Last edited:
wammers said:
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.
Click to expand...

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 said:
but then haw do i test the valve block ??
Click to expand...

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
 
996TURBO said:
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
Click to expand...


i have bin all over with soap-water and cant fine any leak
 
996TURBO said:
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.:cool:
Click to expand...

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.
 
wammers said:
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.
Click to expand...

i start with the compressor .
do i have to de-pressurised the system when i take the compressor out
 
sarstad said:
i start with the compressor .
do i have to de-pressurised the system when i take the compressor out
Click to expand...

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?
 
wammers said:
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.
Click to expand...
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
 
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