1974 C20 still have brake problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mntoy · 11-18-2006, 01:24 PM

Never got my brakes fixed, I bench bleed my MC again, and leveled the truck and did it on the truck too. Back brakes bleed out great and stiff but the front brakes stll have lots of air, not sure why. I have bleed them manually by pushing the brake pedal and used a speedy bleed but lots of air keeps coming out even spurts large bubbles. When I go to fill the reservori small bubbles rise out of the front brake reservoir only(the one for the front brakes is what I mean). while the truck is off the pedal is great but when I start the truck pedal goes straight to the floor and does not come back up. What am I doing wrong, I have been through two quarts of brake fluid bleeding and it has not gotten any better. the brake light does not come on and I have tightened every fitting for the front brakes. Any help out there?

mntoy · 11-18-2006, 03:04 PM

found a leak problem solved

boxrodz · 11-18-2006, 04:44 PM

Cool... Good to hear.
Where was the leak at?
Almost time to get it out on the street and drive it like you ...

mntoy · 11-19-2006, 10:33 PM

It was at the passanger side where the steel line meets the rubber hose. Not sure how that happened.

boxrodz · 11-21-2006, 12:06 PM

Sometimes the smallest things causes the biggest headaches... eh.
It probably stops 'almost' as good as it goes.

marvxyz1 · 11-21-2006, 08:52 PM

You may have a air leak at the place where the rubber line connects to the frame. There are copper washers at the fitting to seal the connection
You might try using new copper washers there Or even double washer it there. I know I had a dickens of a time trying to seal my fittings there.

11-18-2006, 01:24 PM	#1
mntoy Registered User Join Date: May 2006 Location: Calif Posts: 43	1974 C20 still have brake problem Never got my brakes fixed, I bench bleed my MC again, and leveled the truck and did it on the truck too. Back brakes bleed out great and stiff but the front brakes stll have lots of air, not sure why. I have bleed them manually by pushing the brake pedal and used a speedy bleed but lots of air keeps coming out even spurts large bubbles. When I go to fill the reservori small bubbles rise out of the front brake reservoir only(the one for the front brakes is what I mean). while the truck is off the pedal is great but when I start the truck pedal goes straight to the floor and does not come back up. What am I doing wrong, I have been through two quarts of brake fluid bleeding and it has not gotten any better. the brake light does not come on and I have tightened every fitting for the front brakes. Any help out there?

11-18-2006, 03:04 PM	#2
mntoy Registered User Join Date: May 2006 Location: Calif Posts: 43	Re: 1974 C20 still have brake problem found a leak problem solved

11-18-2006, 04:44 PM	#3
boxrodz Until Seventy Times Seven Join Date: Feb 2005 Location: Rocky Mountain Front Range Posts: 1,301	Re: 1974 C20 still have brake problem Cool... Good to hear. Where was the leak at? Almost time to get it out on the street and drive it like you ... __________________ boxRODz 1983 C10 SWB Fleetside When two halves is gone, there's nuthin left. Two nothings is nuthin. That's mathematics son. You can argue with me but you can't argue with figures. Two half nothings is a whole nuthin... Last edited by boxrodz; 11-18-2006 at 06:03 PM.

11-19-2006, 10:33 PM	#4
mntoy Registered User Join Date: May 2006 Location: Calif Posts: 43	Re: 1974 C20 still have brake problem It was at the passanger side where the steel line meets the rubber hose. Not sure how that happened.

11-21-2006, 12:06 PM	#5
boxrodz Until Seventy Times Seven Join Date: Feb 2005 Location: Rocky Mountain Front Range Posts: 1,301	Re: 1974 C20 still have brake problem Sometimes the smallest things causes the biggest headaches... eh. It probably stops 'almost' as good as it goes. __________________ boxRODz 1983 C10 SWB Fleetside When two halves is gone, there's nuthin left. Two nothings is nuthin. That's mathematics son. You can argue with me but you can't argue with figures. Two half nothings is a whole nuthin...

11-21-2006, 08:52 PM	#6
marvxyz1 Registered User Join Date: Oct 2005 Location: Pittsburgh, Pa Posts: 106	Re: 1974 C20 still have brake problem You may have a air leak at the place where the rubber line connects to the frame. There are copper washers at the fitting to seal the connection You might try using new copper washers there Or even double washer it there. I know I had a dickens of a time trying to seal my fittings there.



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