Bleeding rear disc brakes

[qwertydog]

I have just replaced both rear calipers and tried bleeding them the usual way with a vacuum pump. However, the brake pedal is very spongy and on the first push it goes to the floor. Is there a better technique or method ? I have never had a problem with the vacuum method before.

Thanks for any suggestions.

[shorod]

I had a similar issue in my 2004 Mountaineer, used the MityVac and bled until there was no apparent air in the system. The pedal still didn't feel right afterwards. I then purchased the brake bleeder kit from Harbor Freight when it was on sale for $19.99 and tried it out. It worked GREAT, I now have a firm pedal and good brakes.

The other option would be to install a set of Speed Bleeders and do a one person bleed, or use another person to perform a 2-person bleeding. Either of these methods would likely give similar results to the Harbor Freight system in the event you do not have a large air compressor.

-Rod

[qwertydog]

Thanks Shorod,
I used the "two person" method and now the pedal is rock solid. Perfect !
I guess the mini vac did not have enough pull to suck out all the air, so pumping the pedal did the job. Thanks for your advice.

[shorod]

Glad to hear you have a safe pedal again. Thank you for the follow-up, and congratulations!

-Rod