empty hole leaking in bmc

SON240sx Automotive
1

So today I tired to bench bleed my z32 bmc and it when fine.
But when I put it in the car and someone pumps the brakes there is a little hole that doesn’t connect to anything that leaks fluid. My s13 unit has this hole also but it doesn’t leak anything at all. If i hold pressure on the pedal it will eventually hit the floor.

http://i7.ebayimg.com/04/i/000/dd/91/08de_1.JPG
The 2nd hole from the right. The smaller one that doesn’t stick out as much.

What is this hole for, how do I fix this leak, besides the obvious of getting a remaned unit. I know how to take the bmc part. Anyone?

2

that hole is for non abs. find something to plug the hole. if you look through other MC at the junkyard you should come across a hex bolt to fit it.

NON abs cars have Left/Right Front and rear - 3 lines
ABS cars have front and rear - 2 lines, that split at the ABS pump

3

Im not talking about the one with the hex in it, mine has a hex and i have abs so im good to go but to the right of that hex is a tiny hole and it bleeds fluid for some reason. On my s13 the original also leaks a bit of fluid if i get on the brakes really really hard. What is this hole for is it some kind of pressure release for the when the propotioning valve kicks in?

4

get a lil bolt wit some lock tight and plug it

5

it is not a threaded hole, the bmc on my gtr died, it does this now too… my vote get a new master lol, i’m pretty shure that is there so u know your seals are shot. newer nissan masters no longer include this thing i bought one from an r33 when i was at the junkyard they no longer have the hole. and it was 10$ japan for the win.

6

Not sure, but it looks like a bias valve. You can create a different rear bias seeing as the last threaded hole goes to the rear brakes (far right) you can adjust the pressure from the BMC fork.