Question about bleeding brakes.?

Question

If I take the brake pads and rotors out to replace them, is it possible to change the fluid and bleed the brake lines BEFORE installing the new pads and rotors?? I was thinking about this to ensure no fluid gets on the new parts??

Answer 1

What year car? You don't have to do that anymore.

Answer 2

You will not have to bleed your brakes as long as there is no air in the system when you start.
You only need to bleed brakes when you open a bleeder screw or brake line causing a open spot in the hydraulics allowing air to get in there.
Small amounts of fluid that may end up on your pads should cause no problems for it usually will burn off during the break in period but do try to keep the parts as clean as you can.
It isn't a bad idea to flush as much of the older and possibly contaminated fluid out of the system either before or after doing your brake job. Brake fluid is hydroscopic meaning over time it can absorb moisture and in turn causing your calipers to drag and your new pads to wear faster. Also if your fluid is very dark it is another indication of normal breakdown of the rubber in the system and can also cause your calipers to drag. Check you brake hoses for cracks or cuts.
Quick tip: Take the cover off of your master cylinder to allow the brake fluid a place to go when you squeeze your calipers to allow installation of your new pads and rotors.

Answer 3

if you don't open up the system there is usually no need to bleed them out. unless your having issues related to the fluid. if you feel you need to bleed them anyways you can install a rubber line to the bleeder screw and run it into a container to prevent the fluid from getting over everything. the best way to do this would be to use a power bleeder. if you don't have one a shop should do this for you reasonably. but like i said this is something that most times doesn't need to be done. good luck

Answer 4

you do not need to bleed the brakes when you change the pads & rotors unless you have air in the lines .

Answer 5

the brake system is closed, no need to bleed the brakes afer changing pads and rotors, brake cleaner works good if you have greasy hands and touch the parts.

Answer 6

It's possible, make sure the rubber lines aren't pinched & the bleeders are facing upwards.
Clean spilled brake fluid with Brake Clean or Methyl Hydrate.
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Answer 7

yes you can do it this way ,just open all the lines up,and allow fresh fluid to flow through all of the lines until it comes out clear like it should be,or yellowish,i have did it a few times like this also,it does assure that no dirt gets in to the newer parts,just use a piece of hose to direct the fluid in to a pan or a glass bottle with,and you,ll do fine with it,good luck on it.

Answer 8

there should be no reason to bleed the brakes...and replacing the brake fluid is not necessary...unlike changing the oil or trans fluid...brake fluid rarely needs to be replaced.

Good luck.

Answer 9

Yes you can do it before or after installing rotors because removing or installing it doesn't require opening or closing the bleeder valve.

Answer 10

No ! ! ! ! Uou have to have working brakes to bleed the system ,,,, particularrly your drum brakes ,, as without the drums holding the shoes in place all you will do is blow the caps out of your brale cylinders ,,,,,,,,,,,

Answer 11

Yeah.....bleed everything then replace you parts. It won't hurt anything.