Guest Anonymous Posted January 6, 2003 Share Posted January 6, 2003 Is there an advantage to bleeding a new master cylinder in a vice on a work bench, rather than first installed on the firewall of my car. Getting ready to bleed all lines due to new toyota 4x4's just installed and I have a new master cylinder. Quote Link to comment Share on other sites More sharing options...
Guest michael_240Z Posted January 6, 2003 Share Posted January 6, 2003 yes there is an advantage because pressure has to be applied to the plunger of the m/c and if you bled the m/c when it was installed, you'd have to have another person to push the brake pedal whilst you were doing your thing with the m/c. i had to bench bleed the m/c of my 90 240sx when i changed it. i can't remember for the life of me exactly how i did it...the m/c came with bleed instructions but the 81 ZX 15/16" m/c i got for my 73 240Z didn't come with instructions so when it's time for me to install it, i'll be back up in here and zcar to search for instructions how to do it. but i'm sure you can find DETAILED instructions from one of these sites. hope that gives you at least a little insight. mike Quote Link to comment Share on other sites More sharing options...
blueovalz Posted January 6, 2003 Share Posted January 6, 2003 When I bench bled mine, I used flexible rubber (vacuum tubing) tubing that was fitted over the bleed screws on the sides of the MC. Curve the tubing up and around until it dumps the bled fluid back into the reservoir that it's bleeding, maintaining a closed cycle of fluid movement. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted January 6, 2003 Share Posted January 6, 2003 Many thanks Steve Quote Link to comment Share on other sites More sharing options...
pparaska Posted January 7, 2003 Share Posted January 7, 2003 Terry's got it. But I'd like to add some detail: - Put the ends of the tube INTO the fluid, not above it. That way air can't be sucked back in. - Push the piston COMPLETELY into the M/C. This is the reason for bench bleeding - to get all that air out of the M/C. Us a philips screw driver as the pushrod. - Continue to push the piston in (slowly) and let it out (slowly), cycling as many times as it takes until air no longer comes out of the tubes. - Pinch the hoses shut with clamps or something, until you get it in the car. Remove the tubes from the M/C and quickly connect the car's brake lines to the M/C. Messy, and fluid eats paint, so cover everything in the area to prevent paint removal. Quote Link to comment Share on other sites More sharing options...
fl327 Posted January 7, 2003 Share Posted January 7, 2003 when i did mine i bench bled it for two minutes and bolted it up, then bled like normal using a mighty vac, took ten minutes total. seriously. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted January 7, 2003 Share Posted January 7, 2003 A little confused in that it sounds like from Terry you can bench bleed through the bleeder valves, and Pete mentioned shutting the hoses which I guess means the outlets of the MC not the bleeders on the MC. It would be less messy to of course just use the bleeders, but since this is a brand new MC I am guessing that I need to bleed through the two outlet ports. Quote Link to comment Share on other sites More sharing options...
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