I am having to replace the front calipers also, is it still ok to gravity bleed the system without pumping the brakes being that the caliper pistons are not actually touching the pads yet?

 

If you ‘pump the brakes’ with bleeders open, you’ll suck air in...

The pistons being out does not affect air bleeding. But will require additional fluid to top off reservoir when you do pump the brakes after closing bleeders.

When you do pump pedal to push the pistons out, use short strokes. We want to avoid pushing master cylinder piston past it’s normal point of travel. When using 2-man bleed method, use a block of wood under pedal to limit travel.

 

thanks ssj, I have all four bleeders open now and the back is bleeding super slow but I assume will flow a little faster once I close the front bleeders. Are you saying that I need to do the two-man system after the gravity system? I am by myself that's why I was trying to do it with the gravity feed. Or just short pump on the pedal once I am done bleeding and then top off Reservoir?

 

Gravity is often enough. If you still have a ‘spongy’ pedal, you’ll need pressure/vacuum or the 2-Man method.

 

the front brakes have new fluid coming through but the back has pretty much stopped flowing even with the front bleeders closed. Is this normal?

 

Sometimes, you can close bleeders and pump the pedal slowly until it gets hard and then try to gravity again.

Sometimes, ya gotta use pressure/vacuum or 2-Man...

 

And sometimes you just gotta sing the blues

 

I've tried using pneumatic suction bottle and no matter how much fluid I suck out my pedal is still spongy. Do I just keep pulling fluid from each corner? Not really sure what the heck went wrong

 

A little story:

I serviced my rear brake calibers in last winter.
I scratched my head for a while,why theres no air coming from the bleeder!
Previous owner/servicer had flipped the calipers from side to side!
Bleeders were pointing down!
Swapped calipers and loved the sound of air coming from those bleeders!

 

I can't get air to stop coming out, I thought air was a bad thing?

 

Yes,air Bad.
No air at all after caliper service,Bad.
Burst of air,then only fluid,Good.

 

Do I just keep pulling fluid?? Im getting alot of air in each line . Need the truck for work tomorrow, any help would be appreciated

 

2-Man method is what I would do if struggling.

 

thats a bummer, already went through 3 quarts. It doesn't matter that I'm leaving the cap off does it. I'm not letting it run dry

 

Is it possible I got air in the ABS module and will not be able to evacuate all the air in the system? I don't know that's what someone told me but I don't know how credible they are