Dual Brake Master Cylinder - How to Bench Bleed (Moss Motors Tech)

[ProfitOfDoom420]

Sounds easy enough, and his soothing voice gave me a boost of confidence :)

[RadicalRiteous]

Short, sweet and to the point. Thanks!

[intheshitter]

I think this is what I need to do to mine. No matter how much I bleed my brakes, they still feel like crap.

[keasy84]

@intheshitter try doing a complete flush on the system. Brake fluid is hygroscopic, meaning that it absorbs water anytime it comes into contact with it, and over time brake fluid inevitably becomes saturated with contaminants and gets some water in it. This will deplete the fluid's ability to withstand temperatures, and the water in the fluid will boil causing bubbles to form in the system, which makes your brakes feel spongy when you press the pedal. Also check rubber brake lines, they stretch

[silenceisdefining]

ALWAYS BLEED THE MASTER CYLINDER BEFORE INSTALLING IT BACK IN THE CAR THERE IS NO WAY AROUND IT. THERE ARE NO WHAT IF'S. if you would like your car to stop in the future then bleed it properly.

[Mr94EJ1]

so what happens when installing the MC back into the car... like you will have to remove the caps/bleeder-lines and then screw in the brake lines, but in that time will air not get in? i tryed bleeding my master cylinder using above method worked out just fine but for the few small seconds the threaded hole in the mc leaked brake fluid as i was quickly trying to hook up the brake lines so i got air going in as fluid was leaking id imaging??

[jberling1]

im guessing if you ran the lines completely out of fluid that you would need to do this too

[jberling1]

and what if i bought a hand bleeding pump that pumps from the valve instead of the master cylinder

[will9999100]

Is it necessary to bench bleed when replacing an old master cylinder back on such as when replacing a servo?

[fearmenot22890]

its always necessary to bench bleed your brakes, usually when you get a new one, where your getting one they should be able to help you figure that out, Autozone is always a good place

[vachief]

...good video...is there a procedure to bleed the MC..while it's hooked up to the car...haynes mentions the pressure switch disconnect.

[52PontiacEight]

same procedure as in a vice, the important part is to have the lines feeding into the reservoir and take your time. Just disconnect the brake lines from the MC and replace with your bleeding kit. You can also use some short lengths of brake line with fittings on one end and open on the other. Bend the line so that it feeds the reservoir, or use 5/16 ID hose to run back to the reservoir. Pump the brake pedal slowly and continue until no more bubbles appear.

[vachief]

@52PontiacEight ...It's been 2 years now and my brakes still don't feel that good. Your suggestion sounds good, but wouldn't air get back in after you disconnect the bleeder attachment and hook the lines back on to the MC? I saw an interesting bleeder from Giroit's Garage, you hook it on to the brake cylinders and push the fluid....up...to the MC. I bought a pressure bleeder that screws onto the MC and I was able to get most of it.

[52PontiacEight]

@vachief You are correct. the last step would be bleeding the brakes as normal. That should get rid of any remaining air.

[vachief]

@52PontiacEight ...I appreciate the tip....thanks.

[5116789]

ANY GUYS UP?

someone smart please help me uZ

[MossMotorsCom]

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