Brakes not bleeding - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rpmerf · 03-05-2011, 06:41 PM

1970 C20 custom camper with 4 wheel drums

Last week the line going to the rear brakes went out so I replaced it. I've tried bleeding the rear brakes, but the pedal still isn't firm. I had run the MC dry at one point, does that mean I need to bleed the MC before I can bleed the line, or will it just take longer? Do I need to bleed the fronts, or are they independent?

cdowns · 03-05-2011, 06:50 PM

it will take awhile to bleed them completely

if i were in a situation where a brake line rusted out or burst i'd replace all lines that have the same age to them

SCOTI · 03-06-2011, 01:37 PM

The master cylinder should always be 'bench-bled' before trying to bleed the brake lines on the vehicle.

I install the master on the vehicle & route the provided flex hoses back into the reserviors. Fill the master w/fluid & cycle the pedal until there are no air/bubbles. Remove the flex lines & install the hard lines. Start bleeding the vehicle using the farthest bleeder valve as the 1st & working closer to the master from each corner.

rpmerf · 03-07-2011, 01:53 PM

I guess I'll pull off the MC to prop valve line and try to bleed the MC from there.

03-05-2011, 06:41 PM	#1
rpmerf Registered User Join Date: Feb 2011 Location: Parkville, MD Posts: 1,024	Brakes not bleeding 1970 C20 custom camper with 4 wheel drums Last week the line going to the rear brakes went out so I replaced it. I've tried bleeding the rear brakes, but the pedal still isn't firm. I had run the MC dry at one point, does that mean I need to bleed the MC before I can bleed the line, or will it just take longer? Do I need to bleed the fronts, or are they independent?

03-05-2011, 06:50 PM	#2
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Brakes not bleeding it will take awhile to bleed them completely if i were in a situation where a brake line rusted out or burst i'd replace all lines that have the same age to them __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

03-06-2011, 01:37 PM	#3
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,064	Re: Brakes not bleeding The master cylinder should always be 'bench-bled' before trying to bleed the brake lines on the vehicle. I install the master on the vehicle & route the provided flex hoses back into the reserviors. Fill the master w/fluid & cycle the pedal until there are no air/bubbles. Remove the flex lines & install the hard lines. Start bleeding the vehicle using the farthest bleeder valve as the 1st & working closer to the master from each corner. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

03-07-2011, 01:53 PM	#4
rpmerf Registered User Join Date: Feb 2011 Location: Parkville, MD Posts: 1,024	Re: Brakes not bleeding I guess I'll pull off the MC to prop valve line and try to bleed the MC from there.

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