Did you bench bleed the master cylinder first?

Chelby-Ann wrote:

josh-kebob wrote:

Did you bench bleed the master cylinder first?

I did not

That is job no 1.  Always bench bleed first.  That can be done on the car.  Just be sure the fluid bowls stay full.  Then keep the lid off the mc.  fill it. 

Bleed starting with the right rear, left rear, right front, left front.  Put a plastic tube on the bleeder screw and run it into a can/bottle/etc.  (Keep a pan under the calper as fluid can leak around the threads of the bleeder screw.) Open the bleeder screw and let the fluid run thru until there are no bubbles.  Close the bleeder.  Repeat for each of the other wheels.

Constantly monitor the fluid level in the mc.  never let it get lower that half way.  You have to watch constantly as it can empty pretty rapidly.  Particularly the smaller bowl in the back of the mc.  You may have to do this more than once to completely rid the lines of air.

Try the brakes.  If they are soft, bleed again.
 

Chelby-Ann wrote:

I would like to get some advice from the folks that know about bleeding brakes, the Gravity Fed way.I have a new master cylinder, vacuum power brake booster, new proportion valve, brand new brake lines all for a 4 disc set up. Everything for the brake system is brand new.Already bought DOT3 fluid, clear plastic tubing to witness the fluid flow, clear plastic bottle and have worked up the nerve to do this.Plan on starting at the rear passenger side first, rear drivers side second, front passenger side third and then the drivers side last.

Its too easy...no need to bleed the master...fill the master and keep it full as the bleeding takes places...hook up all those hoses to your bleeders  and let them each feed into a seperate bottle...then open all the bleeders at once and watch the fluid and air bubles drain till each runs clear, void of air bubbles..."could take a couple hours"...then tighten them up...pedal should be hard....jj

Did  you gravity bleed the fronts...if so close the front bleeders and keep the rears open ...be sure th keep the master full...it can take hours....jj


 

Chelby-Ann wrote:

Yes I did. Fronts are closed. Reservoir is full. Both rears are open. Check it out in the morning. Thanks

Don't let it run dry....jj

Chelby-Ann wrote:

jerseyjoe wrote:

Chelby-Ann wrote:

Yes I did. Fronts are closed. Reservoir is full. Both rears are open. Check it out in the morning. Thanks

Don't let it run dry....jj

Thanks JJ
Got up this morning and I was happy to see that I had fluid in the rear drivers side bottle and fluid in the master cylinder. Filled her up and will wait for the rear passenger side to show signs of fluid. You were right it may take hours!.

Good to hear that...if you have an old MC cover you could drill a hole in it and apply a little air pressure for a little persuasion....jj
 

Just a little tip, I gravity bleed alot at the shop.  Fill with fluid, pump to  the start moving fluid.  After you open the bleeder at each wheel take your whrench and tap the caliper or wheel cly when fluid appears.  I also do the tap before closing each bleeder.

Just like the nurse flicks the syring to dislodge the air bubbles