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k2rm · 05-23-2011, 01:23 PM

I just converted both front and rear drums to disks on my '70 and had a similar problem. It was a combination of air in the lines and minor leaks in the fittings. I would find a leak, fix it, and then the system would hold a bit more pressure. But then I would find the next 'less' leaky fitting.

I also gravity bled after the pumping method wasn't getting the air out. I would open the bleeder and watch the fluid come out and look for bubbles in a clear tube draining into a cup. It took a while, but I eventually got it and have a nice firm pedal now.

05-23-2011, 01:23 PM	#9
k2rm Registered User Join Date: Aug 2009 Location: Concord, CA Posts: 147	Re: bleeding brakes!?!?! I just converted both front and rear drums to disks on my '70 and had a similar problem. It was a combination of air in the lines and minor leaks in the fittings. I would find a leak, fix it, and then the system would hold a bit more pressure. But then I would find the next 'less' leaky fitting. I also gravity bled after the pumping method wasn't getting the air out. I would open the bleeder and watch the fluid come out and look for bubbles in a clear tube draining into a cup. It took a while, but I eventually got it and have a nice firm pedal now.