Leaking Pressure Regulator - Advice Required

[David]

Hi all, as the title states, I'd like a bit of advice on a leaking pressure regulator.

I've noticed a puddle under the car over the past few weeks. Initially I thought that might've been from a previous leak, but I got under the car today, and it turns out that it's leaking out of the passenger side of the pressure regulator between the regulator itself and the mounting bracket to the gearbox. It looks like a bad leak.

So, how do I fix it?

Is there some kind of removable cap that'll be leaking? If so, what will it need to fix it, will standard o-rings suffice?

It's definitely the regulator itself, as it's only wet on that side and underneath, where it's running on the floor. All the pipes are dry, and I looked on top with a mirror, just to be sure. I've had a quick search on the forum, but I can't find any mention of dismantling a pressure regulator.

Any help would be greatly appreciated.

[rutter123]

Are you sure it's the regulator leaking and not one the pipes or pipe seals? My advice is to give it all a pressure wash and pinpoint the leak first.
Pleaides in Sawtry can most likely supply you with a recon unit or rebuild yours.

[Kitch]

Is it not that plastic return spigot? That's normally what cracks.

[DLM]

This may be a red herring, but I'll throw it in the mix anyway,

I see both of the cars listed in your profile are later cars. I had a return-side pressure-regulator leak after a new clutch was fitted by someone familiar with hydraulic Citroens of a number of generations. They did a bespoke repair (the car is a 92 TXD). Enquiring with a normally reliable source in search of the replacement part, I was told the return assembly changed late in BX production - for cars like mine.

[Jaba]

It sounds like the leak is from the LH end of the PR. If so this will be the end cap o-ring seal failing. They all do eventually unless you are very lucky. It can be changed with the PR off the car by compressing the end cap inwards to access the o-ring. Not done it myself but I have seen seen on the web recently the detail sequence by someone doing the repair.
Easiest thing to do is to just fit another used PR and repair yours at your leisure.

[David]

Hi all, I've just realised that I didn't update this. In the end, I removed the pressure regulator & sent it of to pleiades & they replaced all of the seals in it. Since then I've had no further problems with it. If you're struggling with your own, I recommend them!