I need some help to decide what I s the proper action to fix a leak from the rear Activa block.
A year ago I spotted a leak from the rear Activa block, I decided to replace it with a used one from a scrap yard. After that the leak stopped for a few months. Last weekend I opened my old activa block to see the condition of the o rings inside. All seem to be ok, except the ring that seals the big torx (T50) screw. I had a similar new o ring from the HP pump (or the brake valve I don’t remember) and I have replaced it. After that I replaced again the activa block with my old one, washed the car and waited to see if the leak stopped. I left the engine running for 30 minutes while I activating the rams by moving the front linkages of the activa corrector. This way I was sure that the rams were pressurized (and the rear block also was pressurized, at least to the 2 big pipes going to the rams). There was no leak at all. Now it was time to test the Activa system on the road to get the valve energized and the sphere isolated. Unfortunately LHM appeared again dripping all over the subframe. Washed the car again and supplied the electrovalve with 12V DC (I know the risk but I had a spare coil from the other valve). As soon as the valve clicked open and close LHM started to leak. Now until I can manage with the problem, I disconnected the electrovalve to be able to use the car.
Here is a photo from Sl4yer. With red arrows I am showing the points that LHM drops appears. (The Thick arrow is the main leak)
And here is an activa regulator block. With red arrow is the hole that LHM flows from electrovalve to the piston that isolates the sphere.
I thing that the only possible reason to have a leak when the elecrovalve is energized, is from the o ring seal of the torx cap (screw). Am I right??
If I am right where I can find a proper o ring for that? Is anyone managed to source o rings suitable for LHM.?
Thanks in advance
Lefteris