Master Cylinder Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72ChevyCheyenne · 04-16-2003, 01:46 PM

I bled the brakes last night and noticed that when depressing the brake pedal the fron bowl is pushing up fluid kind of like a fountain. I still have a soft pedal but it will stop. What could be causing the fluid to do this?

Gordo · 04-16-2003, 05:58 PM

The fountain is normal, check your rear brake adjustment. Unless your gravity bleeding the system, keep the cap on the master when you pump the peddle.

lngbed71 · 04-16-2003, 06:33 PM

Air trapped in the lines would be my guess. As you compress the hydraulic fluid in the lines by applying brake pressure, you squeeze the tiny air bubbles in the line. That could cause a "squishy" pedal. Bleed the system a ltlle more, and that should cure the "squishies"

04-16-2003, 01:46 PM	#1
72ChevyCheyenne Registered User Join Date: May 2002 Location: Woodstock, GA USA Posts: 300	Master Cylinder Question I bled the brakes last night and noticed that when depressing the brake pedal the fron bowl is pushing up fluid kind of like a fountain. I still have a soft pedal but it will stop. What could be causing the fluid to do this? __________________ Bill Durham http://home.attbi.com/~bulldurham 72 Cheyenne Restoration in progress Currently: frame sand blasted and powdercoated, Inline Tube brake and fuel lines, Blazer tank in rear, Holley Red electronic fuel pump, Eaton posi with 3.42 gears, 2 1/2" drop front spindles, 4" drop rear springs with adjustable panhard bar, KYB shocks, ZZ 502/502 GM Performance crate engine, Zoops brackets and pulleys, Vintage Air, dual electric fans, Ram Air II hood and late model sport side bed.

04-16-2003, 05:58 PM	#2
Gordo Registered User Join Date: Jan 2001 Location: Killingworth, CT. USA Posts: 3,378	The fountain is normal, check your rear brake adjustment. Unless your gravity bleeding the system, keep the cap on the master when you pump the peddle. __________________ 1971 C10 swb stepside 350/700R4/3.73posi (retired as of 4/22/03) 1998 S10 short bed 2002 S10 Blazer 1942 Oldsmobile 1958 Massey Harris Pony 1951 Wife Killingworth, Connecticut May those who love us, love us, any of those who do not love us, may God turn their hearts. And if God is unable to turn their hearts, may he turn their ankles so we may know them by their limping. A man who works with his hands is a laborer; a man who works with his hands and his brain is a craftsman; but a man who works with his hands and his brain and his heart is an artist.

04-16-2003, 06:33 PM	#3
lngbed71 Nothing fits but the oil Join Date: Mar 2003 Location: Gaston, Indiana Posts: 424	Air trapped in the lines would be my guess. As you compress the hydraulic fluid in the lines by applying brake pressure, you squeeze the tiny air bubbles in the line. That could cause a "squishy" pedal. Bleed the system a ltlle more, and that should cure the "squishies" __________________ Land of the free Because of the brave



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