bleeding problems - The 1947 - Present Chevrolet & GMC Truck Message Board Network

srv8800 · 11-30-2005, 09:26 PM

power brake swap with new booster/mc.. back bled fine but there's no pressure in the front. if i use a vacuum bleeder, i get nothing but air. any help would be great. thanks alot

**truckdude239** · 11-30-2005, 09:32 PM

front cylider on prop vavle closed so no fuild getting to the front brakes

srv8800 · 11-30-2005, 10:50 PM

how did it close and how do i fix it?

thanks for the reply

srv8800 · 11-30-2005, 10:54 PM

also, there's a wire comming off the top of the prop valve that doesn't reach any more after the power brake swap. what is it and is it important? thanks alot

69TowRig · 11-30-2005, 11:24 PM

That wire is for the "Brake" light on the dash, and it warns of low brake fluid/pressure.

**truckdude239** · 11-30-2005, 11:53 PM

the wire does not warn any of that so i been told by an mechican the wire on the prop vavle is to let you know that the prop vavle has been triped hook the wire back up and if the light in your dash is on the vavle is closed. i've been told going down the road hit the brakes hard but in your case? i'd not want to go down the road. someone else will have to answer that. but the vacuum bleeder can pull the vavle shut so i been told if thes no fuild in the lines just air

srv8800 · 12-01-2005, 12:13 AM

i didn't mean to say only air, no fluid. there is some fluid but it's mostly air. could it be that i didn't completly bench bleed the mc? i was told even if it wasn't completly bench bled, the vacuum bleeder would take care of it. is this true? if the valve in the prop is shut, how do i open it? thanks alot

**truckdude239** · 12-01-2005, 12:47 AM

take it off and play with it take and air house and play with it till you can get it to blow air though it thats all i know beside spending 10 buxs for an new one

11-30-2005, 09:26 PM	#1
srv8800 Registered User Join Date: Oct 2005 Location: Texas Posts: 22	bleeding problems power brake swap with new booster/mc.. back bled fine but there's no pressure in the front. if i use a vacuum bleeder, i get nothing but air. any help would be great. thanks alot __________________ '72 lwb pickup daily driver

11-30-2005, 09:32 PM	#2
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,234	Re: bleeding problems front cylider on prop vavle closed so no fuild getting to the front brakes __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

11-30-2005, 10:50 PM	#3
srv8800 Registered User Join Date: Oct 2005 Location: Texas Posts: 22	Re: bleeding problems how did it close and how do i fix it? thanks for the reply __________________ '72 lwb pickup daily driver

11-30-2005, 10:54 PM	#4
srv8800 Registered User Join Date: Oct 2005 Location: Texas Posts: 22	Re: bleeding problems also, there's a wire comming off the top of the prop valve that doesn't reach any more after the power brake swap. what is it and is it important? thanks alot __________________ '72 lwb pickup daily driver

11-30-2005, 11:24 PM	#5
69TowRig Senior Member Join Date: Jan 2005 Location: Raleigh, NC Posts: 894	Re: bleeding problems That wire is for the "Brake" light on the dash, and it warns of low brake fluid/pressure. __________________ -Chris Building a stripper, one part at a time: 1969 K5, 307, 3spd, 3 seats, hard top. Added Pwr Discs, Pwr Steering, Aux Battery, T-case Skid, Lighted Sidemarkers, HEI, Lock-Right Diff, ECE Class IV Hitch, 32" MT/Rs. Parts to Install: Hand Throttle, Console, Tow Hooks, Dual Horns, AM-FM, Dealer Swing-Away Tire Carrier, Gas Tank Skid. Also building a 1950 Willys CJ-3A and off-roading a 2001 Nissan Frontier on 1-Ton Portals...

11-30-2005, 11:53 PM	#6
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,234	Re: bleeding problems the wire does not warn any of that so i been told by an mechican the wire on the prop vavle is to let you know that the prop vavle has been triped hook the wire back up and if the light in your dash is on the vavle is closed. i've been told going down the road hit the brakes hard but in your case? i'd not want to go down the road. someone else will have to answer that. but the vacuum bleeder can pull the vavle shut so i been told if thes no fuild in the lines just air __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

12-01-2005, 12:13 AM	#7
srv8800 Registered User Join Date: Oct 2005 Location: Texas Posts: 22	Re: bleeding problems i didn't mean to say only air, no fluid. there is some fluid but it's mostly air. could it be that i didn't completly bench bleed the mc? i was told even if it wasn't completly bench bled, the vacuum bleeder would take care of it. is this true? if the valve in the prop is shut, how do i open it? thanks alot __________________ '72 lwb pickup daily driver

12-01-2005, 12:47 AM	#8
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,234	Re: bleeding problems take it off and play with it take and air house and play with it till you can get it to blow air though it thats all i know beside spending 10 buxs for an new one __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube



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