Im stumped here guys. A few days a go I changed my front calipers, brake hoses, rotors and pads. When I was done I bled the system from back to front, I did it 4x to each brake and my pedal still feels really soft. I made sure there was always fluid in the cylinder so it never went dry.

Do I need to drain the system and bleed it from the Master Cylinder or something else?

 

Pedal going to the floor there might still be air in the system.

 

Sadly it is but for the life of me I cant bleed all the air out of the system doing it the conventional way. So it looks I'm going to have to purchase a vacuum pump

 

Hmm...maybe there's air that's trapped in your ABS valves that you can't bleed out. Some people have success with driving the car (in a safe, remote area) and stomping the brakes to invoke the ABS system and push the trapped air out into the regular lines. Then, go back and re-bleed at the calipers again to get that freed air out.

 

I always thought that if you drove with air int he system it could ruin the cylinder or bust a hose?

 

As far as a cylinder, I guess that would depend on how much air you're talking about, and over what period of time, but I can't see any possible way that air would damage a hose

I think the issue of damage relates to a lack of lubrication from the fluid, but you'd have to have a ridiculous amount of air in the system to "dry" out a cylinder. A tiny amount of air can degrade your pedal feel enormously; my guess is that if you had enough air to do damage, basically your brakes wouldn't be working AT ALL.

 

AH i see..........Maybe I will drive it around late tonight when the roads are dead, just to be safe.

 

Hey, feel free to get a second opinion on it. I don't wanna set you up for a problem here if I'm wrong on this one. Let's just say that, if it were my car, that's what I'd do

 

My car was doing the same thing as his when i 1st bought it 2 months ago, As soon as i got in the car to drive it home the pedal went to the floor i asked the guy what was wrong with the brakes he told me he think one the calipers might be seized (yea right) mind you i lived 57 miles away
It took me a few hrs a baseball bat and a big bottle of synthetic fluid to sort it out, the pedal felt 90% better but still feels a little squishy il bleed it soon again but there was ALOT of air in it.

 

This may sound crazy, but when you replaced the front calipers, did you mount them upside down, where the bleeder screws are on the top and NOT the bottom?

Believe it or not they can be mounted this way! You have to swap them around or change sides. So double check the calipers. Just a thought

 

You know Im not really sure lol..............I'm thinking it maybe on the top, but I dont know how thats even possible because I changed them one at a time and the right caliper I had to order from rockauto because AAP didnt have it. HMMMMM I really cant remember


EDIT: Ok I just checked and the bleeders on the top of the caliper not the bottom

 

The bleeder screws are supposed to be on the top, aren't they? Air rises... putting bleeeders on the bottom would suck in air...

After some searching, the bleeders are definitely supposed to be on top:

Every pic I can find of installed Supra calipers (even on stock supras) has the bleeder on the top:

 

Maybe I had a brain fart, but I could have swore that the bleeders need to be on the bottom. I wish I was bable to go look real quick to see. Now I am stuck wondering. Can anyone confirm?

 

bleeders need to be on top.

 

yes the bleeders are supposed to be on top, if they are not the system will not allow the air to be removed because there will be an air pocket.

I'm going to pickup a bleeding kit tomorrow and see how that works