# empty hole leaking in bmc **URL:** \ **Category:** SON240sx Automotive\ **Created:** [March 22, 2008, 1:17am UTC](https://forums.speedlife.net/t/empty-hole-leaking-in-bmc/114041 "2008-03-22T01:17:50Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![forrory](https://avatars.discourse-cdn.com/v4/letter/f/6de8d8/32.png) [@forrory](https://forums.speedlife.net/u/forrory)\ **Post date:** [March 22, 2008, 1:17am UTC](https://forums.speedlife.net/t/empty-hole-leaking-in-bmc/114041/1 "2008-03-22T01:17:50Z")
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](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? ---
**Author:** ![S13GG](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/s13gg/32/5506_2.png) [@S13GG](https://forums.speedlife.net/u/S13GG)\ **Post date:** [March 23, 2008, 6:53am UTC](https://forums.speedlife.net/t/empty-hole-leaking-in-bmc/114041/2 "2008-03-23T06:53:21Z")
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 ---
**Author:** ![forrory](https://avatars.discourse-cdn.com/v4/letter/f/6de8d8/32.png) [@forrory](https://forums.speedlife.net/u/forrory)\ **Post date:** [March 23, 2008, 9:29pm UTC](https://forums.speedlife.net/t/empty-hole-leaking-in-bmc/114041/3 "2008-03-23T21:29:40Z")
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? ---
**Author:** ![nitescream](https://avatars.discourse-cdn.com/v4/letter/n/8797f3/32.png) [@nitescream](https://forums.speedlife.net/u/nitescream)\ **Post date:** [March 23, 2008, 10:34pm UTC](https://forums.speedlife.net/t/empty-hole-leaking-in-bmc/114041/4 "2008-03-23T22:34:46Z")
get a lil bolt wit some lock tight and plug it ---
**Author:** ![Heatw](https://avatars.discourse-cdn.com/v4/letter/h/cdc98d/32.png) [@Heatw](https://forums.speedlife.net/u/Heatw)\ **Post date:** [March 23, 2008, 11:26pm UTC](https://forums.speedlife.net/t/empty-hole-leaking-in-bmc/114041/5 "2008-03-23T23:26:34Z")
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. ---
**Author:** ![Osad](https://avatars.discourse-cdn.com/v4/letter/o/3ab097/32.png) [@Osad](https://forums.speedlife.net/u/Osad)\ **Post date:** [March 24, 2008, 6:22am UTC](https://forums.speedlife.net/t/empty-hole-leaking-in-bmc/114041/6 "2008-03-24T06:22:33Z")
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.