1 reply to this topic

[beardylondon]

Hi All

 

So my Mini is a 1966, but when it was rebuilt back (by us) in the 90s we updated some bits, as it was never going to be concours. The car has 10" discs and no servo and the later master cylinder.

 

To be honest, it's so long ago I cant remember much about what we did, so I've taken some pics, as basically the brake limited valve (first photo), is now leaking. From searching the forum you cant rebuild them, so I need a new one.  There is also what looks like a brake pressure regulator valve on the rear subframe (third photo), but only fitted upto 1969 according to Spares. So it seems odd I have both, if we updated everything to later spec, especially as the brake limited valve was only fitted rom 1978 onwards.

 

I've looked a few diagrams, but can't find what I have.

 

Thoughts, as I am keen to know if its worth replacing the brake pressure regulator valve at same time, or if this isnt needed?

 

Edited by beardylondon, Today, 04:07 PM.

[Spider]

I've moved your thread to Problems, Questions and Technical as it's a more appropriate place for it.

 

The Bulkhead Valve is a later one you would have fitted when you did your rebuild, the one in the rear subframe is the original early valve.

 

You only need one of these, though there's little down side to having both, only that there's more rubber and springs in the system than is needed, so would have a higher pedal travel and a more spongy pedal feel than otherwise could be had.

That type of bulkhead valve IMO are not great, considerably more complicated than need be and as you've already mentioned, can't be rebuilt, though, once any cylinder starts leaking, that's the end of the road for them. Also, because of their design, there is a part of the cylinder that is always open to atmosphere and so prone to rusting.

The set up will work just fine with the original valve and given a choice of the 2 that's the one I'd run with. There are kits available for these, though you usually need look at the likes of ebay to find them.