Bench bleeding master cylinder - The 1947 - Present Chevrolet & GMC Truck Message Board Network

pebbleboy · 04-06-2006, 07:50 PM

What would be the difference in bleeding the master cylinder before you install it as opposed to after? This would be before you hooked up any brake lines to it. After you bleed it you would hook up the brake lines and bleed it again normaly.

**truckdude239** · 04-06-2006, 07:57 PM

the way i bled mc is install them on the truck use the bleeder kit thats comes with it and slowy press the pedel and have some one watch till no more air then hook brake lines up bleed whole system but make sure not to run out of brake fuild or you'll be starting all over lol

*rage'nrat638* · 04-06-2006, 07:58 PM

the whole world....
if you bench bleed the master and reinstall the lines and pump up and bleed each fitting at the master you can get away from having to bleed the complete truck and save tons of brake fluid..and about 1 1/2 hours. and possiable broken bleeders on the wheel cyl's

pebbleboy · 04-06-2006, 08:12 PM

Quote:

Originally Posted by rage'nrat638

the whole world....
if you bench bleed the master and reinstall the lines and pump up and bleed each fitting at the master you can get away from having to bleed the complete truck and save tons of brake fluid..and about 1 1/2 hours. and possiable broken bleeders on the wheel cyl's

I'm swapping front brakes to disc so that would only save me from doing the rear.

*rage'nrat638* · 04-06-2006, 09:09 PM

Quote:

Originally Posted by pebbleboy

I'm swapping front brakes to disc so that would only save me from doing the rear.

o man that sounds like a great upgrade...bet your jumping at the chance to drive it, i know i would be. some times it's good to bleed the complete system just to clean the old brake fluid out. clean the lines out..
let us know what kind of a difference it makes..your pal mark

pebbleboy · 04-06-2006, 09:14 PM

Quote:

Originally Posted by rage'nrat638

o man that sounds like a great upgrade...bet your jumping at the chance to drive it, i know i would be. some times it's good to bleed the complete system just to clean the old brake fluid out. clean the lines out..
let us know what kind of a difference it makes..your pal mark

I have been patiently wating till i can get enough time to work on it and do the swap. I was planning this weekend but I think I'll be doing it on Easter.

**truckdude239** · 04-06-2006, 11:41 PM

an hour and half??? wow i installed my mc bled it and bled the whole truck in 20 mins with a helper

qksilver · 04-07-2006, 01:53 AM

I let them gravity bleed, an easy way to flush the system. then slowly pump them up and bleed at the caliper or wheel cylinder.
I have had proportioning valves stick on me when I haven't bench or gravity bled the mastercylinder

04-06-2006, 07:57 PM	#2
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,237	Re: Bench bleeding master cylinder the way i bled mc is install them on the truck use the bleeder kit thats comes with it and slowy press the pedel and have some one watch till no more air then hook brake lines up bleed whole system but make sure not to run out of brake fuild or you'll be starting all over lol __________________ 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

04-06-2006, 07:58 PM	#3
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	Re: Bench bleeding master cylinder the whole world.... if you bench bleed the master and reinstall the lines and pump up and bleed each fitting at the master you can get away from having to bleed the complete truck and save tons of brake fluid..and about 1 1/2 hours. and possiable broken bleeders on the wheel cyl's Last edited by rage'nrat638; 04-06-2006 at 07:59 PM.

04-06-2006, 11:41 PM	#7
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,237	Re: Bench bleeding master cylinder an hour and half??? wow i installed my mc bled it and bled the whole truck in 20 mins with a helper __________________ 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

04-07-2006, 01:53 AM	#8
qksilver Senior Member Join Date: Dec 2004 Location: Southern Pines NC Posts: 3,853	Re: Bench bleeding master cylinder I let them gravity bleed, an easy way to flush the system. then slowly pump them up and bleed at the caliper or wheel cylinder. I have had proportioning valves stick on me when I haven't bench or gravity bled the mastercylinder Last edited by qksilver; 04-07-2006 at 01:54 AM.



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