I bled the brakes with the car off and still had air in the lines. I know there is more pressure in the lines when the car is on so would it be a good idea to bleed the brakes with the car on?

Need to know. I'm about the bleed the brakes again and I dont have a ton more brake fluid left

 

Thats kind of how you're supposed to do it..

 

All the guides I read said to keep the car off.. I just bled them again.. with the car off.. and the car stops a lot better especially at higher speed.

BTW my buddy whos a mechanic told me that once brake fluid is opened and its exposed to air it starts to draw air into it, is this true? I have a can thats 90% full but was opened like an hour ago. If I bleed them again tomorrow with the car on like 12 hours from now will that brake fluid be fine to use or is my buddy misguided? Please respond ASAP because I need to make an hour and a half trip tomorrow to get the SFCs fabricated.

 

Please let me know how you guys bled your brakes... this is ****in rediculous. I can dissasemble and reassemble the whole braking system with ease but the proceedure of bleeding the brakes has become the hardest damn part for me. BTW I just found out brake fluid acts like a sponge so my buddy was right but I think he meant brake fluid absorbs the moisture in the air and thats why it cant be exposed to much air. So is it still ok if I use the brake fluid left in the canister over night after the seal on the canister has been broken.. I need a deffinite answer by morning or I'm kinda screwed..

PLEASE help

 

ive used brake fluid after opening the bottle many times and never had problems. Make sure whoever is pumping your brakes is pushing them all the way in and all the way out. i would just bleed the hell out of every one until u know for sure all the air is out. how much better are the 6G brakes?

 

Just bring it to a shop and have someone that knows what they are doing handle it...

What did I say before... I cannot wait for the threads you are going to start when you replace your brakes.

BTW: If you must know, I bled my brakes with the car off with the key in the Acc position and they are fine...

 

THe way i bled my brakes was first to turn on the car and pump the brakes a couple times. Three to four times is ideal. Remember front and rear brakes run on seperate brake lines. Then turn off the car. Start off with ur front passenger brake, have someone pump it till fluid comes out. then tell him to hold the brake in place and while he is doin that seal the brake line back in proper place. Do this with all the brakes. Fill the brake fluid up to specs and test it out.

 

I bled my brakes with the car ON. I tried with the car off but it didn't feel right. I turned it on, i did each and every corner by pumping 10+ times on each, got out a lot of brake fluid but the bleeding was a success the first time. I didn't have to re-bleed the system. Pedal feels nice.....3 months later.
I used Valvoline SynPower brake fluid....1.5 small bottles.

 

LoL.. See I'm really not that stupid though. On the complicated issues I never have a problem. Its always the stupid simple stuff that hangs me up and drives me INSANE! I think its an issue of when I hear directions on how to do a simple job I always have it stuck in my head that it cant be that simple that I must have forgotten SOMETHING. Just like this situation. I researched how to bleed the brakes. I did it as the instructions depicted and than instead of figuring "ohh I just have to bleed the brakes again the same way I did it, I guess I didnt get all the air out" I immediatly think to myself it couldent be that easy I must have forgotten something, and start to think about all the possible other things I could have gone wrong on and come up with all these silly questions when in reality if I had just stuck to my guns and kept doing what I was doing I would have been in geat shape and not needed any help. I find out later that I didnt do anything wrong and I did the job in fine fashion. But I always make myself sound like an idiot asking questions on simple subjects but I hope this post clears up why.

BTW I know I'm not special by any means of the word but everything done to my car I have done myself and done it sucessfully. People like to bust my ***** but there are many members on the org who would bring their car to the shop to do the work I've done to my car. Not to mention the fact that I never grew up with a father who taught me about cars. He never knew anything about cars. Hes your typical white collar worker who spends a lot of time in the office. So everything I have EVER learned about a car its through reading online and in magazine and having no fear while tackling these projects. I may not be a car expert but at the rate I'm learning because I am SO passionate about cars I will be able to be the expert father figure for my kids when it comes to cars.

 

brake fluid draws moisture in from its surroundings, hence its recommended not to use a bottle that has been sitting around for awhile. What the moisture does is lower the boiling point of the fluid. Performance brake fluids combat this by having higher dry and wet boiling points

 

Yeah I know that I just dont really have a concept of how long it takes for the boiling point of brake fluid to be lowered because of exposure to moisture. I've never worked with brake fluid thus why I am asking lots of questions.

 

It also depends on the humidity in your area.

 

Its hard to say how long. Hence the longer a used bottle has been sitting out, the least likely you should use it. As NmexMAX said, it depends on the humidity in your area.

 

high humidity here. The ocean is literally less than a football field away.

 

Unless you jumped into a chem lab with all the proper instrementation, just use it ASAP and/or cover it up... Maybe toss it in a dry box if you have one available.

 

Let's just hope he doesn't try to change his own oil, he might have trouble finding the filter

I'm just having fun with ya sciff5, you should seriously be proud of yourself for trying to learn through experience.
Most kids these days just run to Mommy and Daddy for extra money to pay a mechanic.

 

Sciff, I didn't see that you posted you had someone helping you. As stated above, when diy at home you need two people unless you gravity bleed, which in itself is another story.

Tell us exactly how you tried to bleed your brakes and I'll try to figure out what you're doing wrong.

OH BTW, If you're reusing it in one or two days you'll be fine. Not reusing it = weeks or months. Some manufacturers even sell it in plastic bottles not cans which allows moisture in. (But of course the sooner the better)

 

Yeah I had someone helping me for the brake bleed I couldent really have done it alone without one of those vacume kits you can buy.

This is what I did. I disconnected the old brake lines and let the fluid drain out into buckets, the fluid that didnt drain out I pumped out using the brake pedal, took the rotors and calipers off the car. Painted the 6th gen rotors and calipers and the stock rear rotors and calipers. Connected the SS brake lines to their metal fitting clipped them into place, installed the rotors and calipers connected the parking brake in the back and brake lines in general. Tightened all the bolts, got my buddy and with the car off we filled the reservior with the new high performance fluid capped it and then my buddy went to the rear passenger wheel connected the clear hose (which you can get at Home depot, the 1/4" vinyl stuff works great for 1.50$ for 10') and I got in the car and pumped the brakes several times, (the first time we did it I had to pump the brakes quite a few times to build up some pressure in the system because it was filled with air) once I had a little bit of pressure I held the brake pedal in told my buddy to open the bleeder screw, he opened it, watched to see if bubbles came out and closed the screw before the fluid stopped flowing as to prevent any from moving back into the system (potentially with air) at which point the brake pedal also sank to the floor. Once he closed it he let me know, I let my foot off the brake, we checked the reservior, filled it and capped it again if nessecary and repeated the process. As we got closer to the front driver side wheel it took less and less pedal work to build the pressure up untill the brake pedal felt like a rock. After we had bled the system with all the bleeder screws closed and the car still off I pumped the brake pedal a few times. then took the car off jackstands turned it on and tried it out.

We bled the brakes in what I have read several times is the appropriate order. Passenger side rear, driver side rear, passenger side front, driver side front.

The first time the brakes worked...OKAY but after the second bleed they are working pretty damn well now. I could try and bleed them a third time just to see if I potentially get any better pedal feel but honestly the pedal feel is pretty good now after the second bleed and this thing stops from triple digit speed easily.

 

Sounds like all is well.

 

it's only $3 for a pint of valvoline syn power brake fluid at autozone....if your that paranoid about fluid...just buy a new bottle?

 

I was specifically told not to mix the ATE blue fluid from the GD with other brake fluids

 

shoulda bought valvoline syn power then

 

ahh well shoulda....coulda...woulda....

 

I just bleed my brakes at a shop and the car was on while they were pumping the pedal.