1966 Valiant Dual Master Upgrade Problem

[Eric Cheetham]

Good day everyone! I've stupidly embarked on the journey of upgrading to a dual master cylinder and the majority of the project has not gone my way. Having worked out most of the bugs i have one issue left, as follows:
I kept the stock distribution block (Inline's is wrong, discussion for another day) and plugged the original master cylinder inlet, which is a different size fitting. I routed from the master cylinder to the upper inlet, passenger side to the rear outlet, and driver side to the lower outlet as shown in the "How-To" that most people use.
I've bent three brake lines with two different fittings to the upper inlet and can not fix a massive leak issue here. It's leaking from between the hose and fitting and not the threads. I've confirmed that the block is open all the way through with no obstructions by pouring brake fluid through each port to watch if it comes out the others. There was no issue in the past with leakage and the only thing I can think of is that a good seal between the tube and port is no longer possible on this block.

Has anyone else had this issue? Am I overlooking something? I'm using the block for only the front lines, the rear line is plumbed from the master directly to the rear.
Thanks!!!

 

[AJ/FormS]

That sounds all messed up
Will need a pic to sort it out.
Original drums all around?
Original Wheel cylinders?

OK wait I get whatchur saying
And I don't know the solution.
Except to say that you probably have a mismatch of tubes and fittings. The original parts are often coded with specific factory fittings so that it is impossible to plumb them wrong. You may think that the part you are using is correct because it screws into the block, but it is likely that the line is not the correct size to fit the seat. Take a real good look at the original lines and fittings.
You may have to buy a flaring tool and fabricate your own ends.
Is this your block?

If yes then look at every port and determine if they all take the same tube size, irrespective of the fitting sizes.