Front brakes dont work after 5-lug swap

[corey240]

I had this 5 lug swap on my coupe and never had any issues. We just swapped the whole assembly brakes and all. This is only the FRONT that do not work. The rear were not touched.

We bled the fuck out of these brakes. The calipers are not upside down. I noticed a small seap leak from the master so I replaced it. The master was already bled externally then we bled it at the lines just in case. Literally no Difference.

Basically when I pres the brake pedal down it goes straight to the floor and will only work if Im barely moving at all. The rear brakes are 100% fine. We pulled the booster vac off to get pressure back to the pedal to see if the calipers are seized and they are not, which I already knew when we swapped the pads but had to check.

I really dont know what els to do now.

[nightsauce]

i had the same issue except I blew out my master stock master cylinder. I then swapped to my z32 master and it worked just fine. When you pump the brake does the pedal get harder?

[corey240]

Yeah if you pump the brake with the car off it gains feeling, then if its on or your driving it goes soft again and has like no feeling. When we bleed it the thing feels like normal s14 brakes which feel nice and usually engage pretty good. I have always noticed s13 brakes are soft and mooshy.

[nightsauce]

Yea, when my master cylinder blew it felt like that. I bled the brakes to death and had no brake pressure. Definitely blew my mind.

[rcdad123]

how much bigger are the new calipers compared to the old ones? you might need a bigger master cylinder. how are you bleeding them? does the pedal build any pressure at all? sounds like it is not getting bled properly. if there is no leak and the master is new, it`s not getting bled properly. try doing this if you have not tried already, have some one step on the brake pedal a few times and while he/she is pressing on the pedal, open the bleeder line on the driver side really fast and close it right away. have the pedal pumped a few times and repeat the process. make sure the master cylinder does not go empty. do this on ALL FOUR CALIPERS, starting from the left front, right front, left rear, and the right rear. you might have to rebleed the left front after the right rear. good luck.

[corey240]

Like I said, I bled them multiple times. And correctly. Thats why this is so frustrating. Even after installing another master that was known working it still persists to not work.

The brakes are just stock s14 brakes.

[Tokona-x]

When you bench bled the master did it feel nice and stiff? Just trying to narrow your problem down.

[Kiro1968]

Is this on a s13 with ABS or s14 with ABS?

[CleanAndLegit]

rebleed all 4 also try taking the rubber brake line from the hardline on em idk but it worked for me

[Hashiriya415]

Check rod coming out of booster and check pedal height and free play. I'm so sleepy right now but hopefully what I said might help.
Also if you have SS lines and you kinked them or did something, they can get damaged internally and clog.

[rcdad123]

Like I said, I bled them multiple times. And correctly. Thats why this is so frustrating. Even after installing another master that was known working it still persists to not work.

The brakes are just stock s14 brakes.

was the brake fluid really dark and dirty on the master cylinder that you replaced the old one with? if it was, the replacement master cylinder might have gone bad when you put new fluid in it. i seen this happen a few times at work. the dirt holds the seal, but when you flush the brake fluid to clean the system, the master goes bad because the dirt that is "holding" everything together is gone. put a brand new master cylinder in it and do the bleeding procedure all over again.

[0wn3r]

What order are you bleeding them in? How do you know the rear brakes are "100% fine" (or what does that mean? are they working ok?)

[nightsauce]

bleed rear drivers, rear pass, front passenger, then front drivers.

[corey240]

Alright so I got time to re-bleed all the calipers and in this order people keep mentioning and still the same result. There is no fluid leaking from ANYTHING. No weird noises nothing.

I have done this swap like 3 times and never had an issue on any of them and this is the third car Ive put these known working brakes on. I am just dumbfounded at this point.

[s14canyoncity]

damn im stumped just reading it, i had the same issue but its because i upgrade from s14 non abs brakes to full z32 with out the BMC.

was the BMC you replaced the old one with brand new or used? I would try a brand new one.

[fliprayzin240sx]

Air still coming out of the lines?