Dontoh

I'm in the process of bleeding my brakes, starter at RR.. Brake reservoir is full, but no fluid is coming out of the bleeding nipple.. I had the MC off when I repainted my bay, and heard that I need to bench bleed it before bleeding my brakes?

How exactly would I do that, and why?

Ej8_KiD

keep bleeding it , u most likely have a lot of air in the system.



basically with the MC out of the car u push the piston in and connect 2 hoses so that the fluid goes back into the canister , keep doing that until u dont see any more air pockets then install it on the car and bleed the system a few times and that should take care of it.

Dontoh

yeah there's definitely lots of air in the system.. is bleeding the mc necessary?

ChrisSmilesBack

Very .

Then bleed rl, fr, rr, fl.

94eg!

iTrader: (2)

If you cant get it to push fluid out the bleed ports on the calipers, then yes bench-bleeding is necessary. I've gotten away without doing it on a few MC installs. I did have a lot of trouble with a clutch MC once though.

Also Honda f'ed up a clutch MC install once in my wife's Element by not bench-bleeding. That cost them dearly. Also cost me use of my car for weeks and major headaches...

apexi_rsx

Ive never bench-bleed either but it does take a lot longer to get all the air out of the lines. Ive done it without with success but they do recommend that you do it in the directions. it's not hard to do or does it take much time to do. better safe then sorry

Dontoh

alright, that 2nd post kinda went over my head.. so what exactly am i trying to accomplish by bench bleeding my mc, and how exactly would i do it?

94eg!

iTrader: (2)

You just push the piston in repeatedly until no more air-bubbles are seen in the clear tubes. This is how you make sure there is no air inside the MC before installing it.

BTW: Don't push the piston all the way in. The manual says it could damage something inside the MC.

Dontoh

alright. i went out and bought some brake line and fittings, ive got it all hooked up (looped) so the brake fluid goes back in instead of just plugging the holes..


after i get all the air out, how do i install the mc without letting air get back in?

94eg!

iTrader: (2)

It won't get in What will happen is the fluid will just leak out from the master cylinder down continuously making a mess. Don't let this fluid touch any paint. Bad news if it does. Keep soapy water and a tub nearby to wash off any brake fluid immediately.

Perhaps you can install the MC before removing the rubber hoses. Then you can catch the minimal mess as you thread in the real brake line fitting.

apexi_rsx

make sure to use car wash soap not dish detergent because dish detergent can strip wax right off a car. if u do i would re wax the area immediately after u wash it.