What, how, & why gravity bleeding doesn't work! #shorts

[jeffwestbrooke]

I have been a mechanic for 25 years. There are many applications where gravity bleeding is complete and others where it is an effective first step.

[Stopbeingfoolish]

Gravity bleeding is only to prime cylinders when pumping the pedal doesn't work. Gravity bleed to get fluid in the lines then pressure bleed to remove air pockets.

[gary]

I do it every time with calipers. Close the bleeders pump the pedal then open each bleeder the air comes out and close them. Then drive the vehicle works great every time.

[Iamthestig]

It does work in some applications in a pinch but not appropriate for pro shop work. My restoration project as a teenager was a 64 falcon ranchero. 4 wheel drums, single circuit master. I had nobody to help me and no money for tools. Gravity bleed totally worked on that car. Tried the same thing on a 97 suburban after a quick roadside rear axle swap during a road trip where I did not have tools and it did not work.

[Dan-gjhz]

I put tubing over the valve, put the bottle above the line with half full of fluid and press the brakes. Works great.

[Cr]

One day when you will become a Great mechanic you will understand it is use in certain applications

[Hlzsnpr]

Gravity bleeding works great to get you close to finished then one or 2 pumps from a second person finishes it up

[camronrichard]

Gravity bleeding is good for a lot of things, if I have a completely dry system I'll crack all the bleeder valves loose and fill the reservoir up and wait and when one starts dripping I close it till they're all closed and then bleed properly, clutch systems alot of times have a relatively straight hose and I have been able to just gravity bleed them after changing a slave cylinder but still a lot of times have to resort to manual bleeding. There's a time and a place for everything

[andyking]

i have done lots of old Corvettes. After replacing all the components, I'll fill the master and open all four bleeders and then go to lunch. When I return it's much faster to complete the bleeped ING process as the system is mostly full of fluid.

[jacobkutscher]

This video is awesome! Excellent job on explaining this. Can’t begin to tell how many people I have tried to explain this to. Again, we’ll done

[SaulTamalezX]

Thank you for explaining this to people

[VulcanGoF]

I'll continue to use my vacuum brake bleeder kit.

[keithhawk]

Every Single Brake job I have done over past 20 years in or out the shop, if I gotta open the system I always start bleeding process by using gravity process. Eliminates alot of potential headaches. If you pump brakes like crazy you can turn 1 air bubble into a thousand little air bubbles. You don't need alot of fancy tools, probably one of easiest things to do, at least for me anyway. When bleeding your brakes gravity is a great start to the procedure. Gravity is your friend when bleeding Brake system.

[chevy]

Gravity bleeding is for when you have basically no fluid left in the lines, if you don't want to pump the pedal for 5 days then you gravity bleed or pressure bleed.

Gravity bleeding was never considered as a proper and final bleeding. Just to get you started and past the bullshit.

[ryanbuettner]

I'm so glad someone finally said it. Truth is it works for some but not for all. Which do you trust.

[braddean]

I did this last night on my 01 Jeep Cherokee it worked perfectly you just start from the farthest side and work your way around.

[Collin]

I’m hearing a lot of people say “gravity bleeding works…and then I pressure bleed them.” I feel like the appropriate revision to that sentence should be, “gravity bleeding can help, but you should then follow up with pressure bleeding.”

[DrHydeMrJekyll]

I do slightly agree. I have seen gravity bleeding left overnight work in certain situations. However, common practice is to yes, manually bleed them. It's more efficient and without a doubt gets the job done.

[Coupe]

I am a mechanic also, gravity bleed will get a lot of air out, so it just makes it a little easier if you don't have an extra man for a bit. Gravity out most of the air, then finish with a couple pumps. Will gravity bleed work alone, not usually, but it will get most air out, but you need that pressure to push it all out. Not only does air float, bubbles stick. It just shortens the time. Even in this vid it shows gravity got all but a tiny bubble out. That bubble alone that size, would have little effect on your system. So I guess after 35 as a mechanic I'm one of those astonishing amount of people. It works, it just doesn't get all the air out. Every mechanic I've known, in every shop, gravity bleads out the majority of the air, then finished with a few pumps, instead of 30 min of pumping and releasing pressure. I have also never seen a brake system with a vertical loop, and would never install one. He had 2 vertical loops. Take those out, and re-run this test!

[schneir]

I just use the jack handle and a scrap piece of 2 x 4 wedged against the seat to push in the brake or clutch pedal in my Miata, to bleed either hydraulic lines by myself. It works.