brakes wont bleed??

[///M42 sport]

I replace my brake lines today along with 2 remanufactured front calipers. Then went through the process of bleeding my brakes. I couldnt get anything to bleed from the rears or the passenger front side. It bleed fine from the drivers front though. Not sure where start in diagnosing this?

[FLG]

What is happening? Pedal not moving?

Sent from my Galaxy Nexus using Tapatalk 2

[FLG]

What is happening? Pedal not moving?

Sent from my Galaxy Nexus using Tapatalk 2

[jlevie]

Are you using the pedal method, or a pressure bleeder? Either can work, though the pressure bleeder is going to be easier.

If the fluid drained out of the lines when you were changing parts, there may just be a lot of air in the lines and it will take a lot of pedal pumps to push it out.

[yeaseth]

open the lines up as soon as there is a connection after the master cylinder to see if theres anything that comes out, just trace it like you would an electrical bug

[Steve Corbett]

I replaced my master cylinder and had issues bleeding. I doubt the previous owner(s) ever flushed the fluid. I took rear calipers off, disassembled them and the fluid was the consistency of Hersey syrup. The orifice that the bleed screw opens was totally clogged. I needed a small piece of wire to unclog it. Open the brake line to the caliper and see if fluid comes out.

[///M42 sport]

so tried bleeding brakes again today. Replaced the slave/master/all brake lines/both front calipers.

Used a pressure bleeder but couldnt bleed from the passenger front. ? Also the brake pedal feels like theres air in the system. How do I go about troubleshooting?

[Smelser]

pump the piss out of them. till it feels solid, open the left front. repeat, switch with your friend frequently to prevent leg cramps

[e30mpg]

gravity bleed.

start with rr and crack open up the bleeder screw, stick a vac hose on the bleeder and the other end into a coke bottle and go have a beer until u c constant fluids coming out. Then continue on, gl

[monty23psk]

There is a pro portioning valve under the car the splits the fluid to both rear wheels that can get clogged.

[jlevie]

so tried bleeding brakes again today. Replaced the slave/master/all brake lines/both front calipers.

Used a pressure bleeder but couldnt bleed from the passenger front. ? Also the brake pedal feels like theres air in the system. How do I go about troubleshooting?

Starting at the caliper crack each connection in the line with pressure on the system to find the point of blockage. If you get all the way back to the ABS unit and still have no flow, the problem is in the ABS unit since both front brakes are fed from the same line between the MC and ABS.

[Ceeker]

if you didn't have a problem before changing the lines as mentioned above; chances are you just have way too much air in the lines. One way you can bleed the ABS is turn the car on and bleed the system that way. Furthest caliper from master to closest. The close off the system. top fluild up again and start over with the car off. the only way you would get a clog in the system if you had never changed the fluid and debris was left in the res. Since you replaced the master and bleed it you shouldn't have any blockages except maybe for a nipple opening.

You're gonna have to heman the brake pedal until you get flow. Good o'l fashioned way of bleeding the system never fails.

As mentioned also gravity bleed is also good. Crack open the nipples and walk away for a few hours. GL.

[jlevie]

if you didn't have a problem before changing the lines as mentioned above; chances are you just have way too much air in the lines. One way you can bleed the ABS is turn the car on and bleed the system that way. Furthest caliper from master to closest. The close off the system. top fluild up again and start over with the car off. the only way you would get a clog in the system if you had never changed the fluid and debris was left in the res. Since you replaced the master and bleed it you shouldn't have any blockages except maybe for a nipple opening.

I've never had a problem bleeding a brake system from a dry condition with a pressure bleeder. But that is when everything in the brake system is working properly. The only times I've encountered cases of a caliper(s) not bleeding there has been a blockage in that circuit. A crimped line, bad soft line, plugged bias valve, plugged bleeder, or a fault in the ABS unit are all possibilities and I've seen all of those on occasion.

In this case one front caliper will bleed, but the other won't. That says that the line for the front brakes to the ABS unit is okay. That leaves the ABS unit and the line from there to the caliper as possible suspects. A stuck valve in the ABS unit isn't an uncommon occurrence, especially if the brake system hasn't been maintained properly with fluid changes every other year.

[///M42 sport]

If it is the ABS stuck, can it just be cleaned out with brake cleaner?

[monty23psk]

No, it's hydraulic pumps and valves. Brake cleaner is for brake debris, like brake debris and grease. For mechanical areas. I would suggest disconnecting lines/hoses before calipers to make sure you are getting fluid to certain points.