Recent content by henry974

Thank you all for your encouragement and support. :thumbsup: I'll head over to top hydraulic to change my lifters; That way the problem will be solved once and for all. If I understand correctly, I have to send them my lifters so that they can rebuild them since I don't live in the USA. I know...

Jas Thank you for all these explanations; to be honest after all my research I was also thinking of an internal hydraulic leak; at the two hinge lifters. Which I find odd; why both at the same time? And why do I manage to have pressure during part of the sequence? If there was no more sealing...

I don't know if the first pump is original or not. I checked the pipes 11 & 13 together and 12 & 14 together it's good I will try to check if a pipe is pinched.

the new group on the left and the original old one on the right Does anyone know the adjustment of the pressure screws in the hydraulic block?

I changed the complete hydraulic unit not just the electric motor. So the bypass is new and not seized up. To be sure that it is completely free, I did not reassemble the fixing of the mechanism of the bowden cable. Currently the hydraulic unit is in the trunk; while I find the fault. Indeed I...

The problem existed before I touched anything. I even put its engine back in the original position and it's still the same. It's actually a weird problem; I haven't seen this anywhere on the internet before.... :( :( :(

https://youtu.be/7jjmkgHwKnU

I changed the hydraulic group in the trunk https://m.media-amazon.com/images/I/61eNScRVbCL._AC_SL1500_.jpg I will make a new video :wink:

When I open the roof; The locks work, but I have no pressure in the circuit; as if the by pass was activated; The pressure returns when I am about 1/4 of the complete opening; And there I can finish the sequence normally.

In fact it all started one day when I went on a walk; It started to rain; I wanted to close the hood and she did not want; Obliged to close in manual. So I immediately thought of the immersed engine; But leaving it from its location it was in perfect condition. I then thought of the hydraulic...

I changed the hydraulic group it is new I have already reversed the hydraulic circuits and the connectors + and -

My z4 is a left-hand drive, I checked the cable from the roof release motor to where I could in the soft top. I did not look on the right side. If this famous cable is cut does the engine continue to run or does it stop working? Mine spins all the time.

I have already checked the electrical harness at the top of the roof and it is good. To isolate the problem of the electrical harness I supplied 12 volts directly to the pump and the result is the same

Sorry I didn't read myself the pump is in a vertical position :wink:

Hello Jas and thank you The bowden cable is not installed; I can thus check if the by-pass is activated or not. When the roof is closed and I want to open it, I have no by-pass pressure; on the other hand when it is down and I start closing the bypass is hard. My engine is currently in the trunk...