Bleeding brakes, sucking air from Master cylinder?

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Jason in DLH

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Just to clarify...your closing the valve before she takes her foot off the pedal?
 
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optimusprime

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Just to clarify...your closing the valve before she takes her foot off the pedal?
No. Just a constant pump and release. The end is submerged in fluid. Worked awesome for the rear. But no there is no pressure build up of which to speak.


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Jason in DLH

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Definitely don’t want to do that as you could damage the MC or blow a seal by doing that.
 

Jason in DLH

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Are you doing this...

1. Have her Pump, pump, pump, pump, pump AND hold;
2. Now I opened the bleeder valve for a few seconds to let brake fluid out;
3. Close the bleeder valve, continue pumping...
4. Repeat and repeat and repeat....
 
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optimusprime

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Are you doing this...

1. Have her Pump, pump, pump, pump, pump AND hold;
2. Now I opened the bleeder valve for a few seconds to let brake fluid out;
3. Close the bleeder valve, continue pumping...
4. Repeat and repeat and repeat....
No. Just hold them crack and pump away. The videos I’ve seen like this had it performed this way and there was no air sucked in because the hose is submerged in fluid.


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optimusprime

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The rear two were both done like this and it worked awesome. No air sucked in.


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