P38A Adding a valve to manually fill EAS tank and why did my pump fail again?

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Montyjohn

Well-Known Member
Posts
231
Location
UK
I think I've blown my EAS pump again. Repaired it about 6 months ago, and EAS worked perfectly, but today it refuses to raise.
It was working perfectly the other day, and I drove with the tailgate open. EAS was therefore disabled. About 15 minutes into the journey EAS fault message pops up. Thought this was weird as the EAS shouldn't have been trying to do anything.

Cleared it with the Nanocom, it just said invalid error, then pump was running continuously, getting very hot, rear valves open, but not raising. So assume the pump is toast again.

What's strange is the car barely lowers when left for a couple of days, and after repairing the pump 6 months ago, the EAS was operational almost immediately on start-up, so it seemed to be holding pressure. I've not found any problems using soapy water.

Before I do anything I want to add a Schrader valve to fill the tank, get the car to the right level so I can use it, and monitor the tank pressure to see if it's holding decent pressure.

Couple of questions.
Which pipe am I best attaching my 8mm/8mm/6mm t-piece to?
I was thinking to the one that I think is heading to the dryer. Would this fill the tank with the engine off?

Screenshot 2024-09-10 095901.jpg
 
Yes valve should be in the 6mm tank line (port-6 on diagram below), but after fitting & pressurising do the soapy water tests on the tee & valve with cap off.

FYI, the lower 8mm line (port-7) is the pump feed to the dryer when filling. Dry air then returns via Port-5, through the NRV1 and out port-6 to the tank. When lowering the car, air comes from the bags via exhaust valve & NRV3 out Port-5 and backwards through the dryer to the exhaust. This extracts moisture from the dryer to the exhaust.


1725965738724.png
 
I think I've blown my EAS pump again. Repaired it about 6 months ago, and EAS worked perfectly, but today it refuses to raise.
It was working perfectly the other day, and I drove with the tailgate open. EAS was therefore disabled. About 15 minutes into the journey EAS fault message pops up. Thought this was weird as the EAS shouldn't have been trying to do anything.

Cleared it with the Nanocom, it just said invalid error, then pump was running continuously, getting very hot, rear valves open, but not raising. So assume the pump is toast again.

What's strange is the car barely lowers when left for a couple of days, and after repairing the pump 6 months ago, the EAS was operational almost immediately on start-up, so it seemed to be holding pressure. I've not found any problems using soapy water.

Before I do anything I want to add a Schrader valve to fill the tank, get the car to the right level so I can use it, and monitor the tank pressure to see if it's holding decent pressure.

Couple of questions.
Which pipe am I best attaching my 8mm/8mm/6mm t-piece to?
I was thinking to the one that I think is heading to the dryer. Would this fill the tank with the engine off?

View attachment 325700
Sounds like the pump is feeing a leak somewhere.
 
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