Brake bleeding problem??

superchargedrookie · 11-06-2009, 06:25 PM

I replaced my rear calipers and then bleed them and noticed, (as my son was pumping the peddle) air bubbles rising up from the master cylinder to the top of the reservoir??? Does this mean I have an air leak?? Please help if you know what your taking about--as I don't. thanks

mr.ac · 11-07-2009, 12:15 AM

maybe the air that was inside the calipers? hows your break pedal feel?
I would keep bleeding the breaks till the bubbles are gone.

superchargedrookie · 11-07-2009, 11:31 AM

Yeah, we bled them for a very long time and do believe we got all the air out of the calipers but still noticed air rising up through the reservoir, only when pumping the peddle??

scottohno · 11-09-2009, 12:31 AM

it MAY be a primary cup on the piston of the master cylinder. if it was all you have to do to check is take off the master and look to see if theres brake fluid in the booster. thats the only thing i can think of. the leak would have to be right next to the master if thats where the airs coming out.

11-06-2009, 06:25 PM	#1 (permalink)
superchargedrookie No Skills Join Date: Mar 2007 Location: Ferndale WA Posts: 9 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (1/100% )	Brake bleeding problem?? I replaced my rear calipers and then bleed them and noticed, (as my son was pumping the peddle) air bubbles rising up from the master cylinder to the top of the reservoir??? Does this mean I have an air leak?? Please help if you know what your taking about--as I don't. thanks

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11-07-2009, 12:15 AM	#2 (permalink)
mr.ac Just Say NO to Snorkes Join Date: Nov 2008 Location: Central Coast, CA Posts: 388 Thanks: 0 Thanked 19 Times in 18 Posts iTrader Rating: (1/100% )	maybe the air that was inside the calipers? hows your break pedal feel? I would keep bleeding the breaks till the bubbles are gone.

11-07-2009, 11:31 AM	#3 (permalink)
superchargedrookie No Skills Join Date: Mar 2007 Location: Ferndale WA Posts: 9 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (1/100% )	Yeah, we bled them for a very long time and do believe we got all the air out of the calipers but still noticed air rising up through the reservoir, only when pumping the peddle??

11-09-2009, 12:31 AM	#4 (permalink)
scottohno control your hose Join Date: Feb 2009 Location: Fox Lake, IL Posts: 5,100 Thanks: 43 Thanked 93 Times in 83 Posts iTrader Rating: (7/100% )	it MAY be a primary cup on the piston of the master cylinder. if it was all you have to do to check is take off the master and look to see if theres brake fluid in the booster. thats the only thing i can think of. the leak would have to be right next to the master if thats where the airs coming out.