MasterV8

iTrader: (7)

I have new brake & hoses with T/C & understand the method for changing them... But! How do I stop the master cylinder from draining while I do this?
I think I'm going to purchase a Motive bleeder to bleed the system aswell.

fleetmgr

You can't stop it, and your brake system probably needs to be flushed in any event.

MasterV8

iTrader: (7)

I'll be bleeding the system anyway, but do I have to drain it completely or keep somehow topping up the master as I do the install like I would as if I was doing a normal brake bleed?

LS6427

iTrader: (2)

I just bought new metal lines all around.

I'm also putting in a performance fluid, so I'll be flushing my entire system thoroughly. After I remove the lines and all the fluid (or most of it) drains out in that process, then after I put the new lines back on..........Sam Strano told me to fill the brake fluid master cylinder, then bleed the rear-right, then the rear-left, then front-right, then front-left.

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MasterV8

iTrader: (7)

Ah Ok! It just I was always told you'd run into problems if you let the master drain out completely.
So just drain it do the swap, refill and bleed as normal?

LS6427

iTrader: (2)

I just re-read his email. He said to start by sucking as much of the old fluid out of the master cylinder.......then top it back off with the new fluid. Then bleed/flush it through in the pattern above.........and DO NOT allow the master cylinder to run dry while doing the bleed/flushing at all corners.

So wait at each brake for the new fluid to come out...easy to see the new clean fluid. And have a friend there to keep topping it off between and during hitting each brake to bleed/flush it.

My question is, when i'm replacing the lines won't most of the fluid come out?

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fleetmgr

Right...if you let the master go bone dry, then you're in a situation where you'll need to bench bleed the damn thing.

LS6427

iTrader: (2)

So while we're changing these 4 lines....should we leave the top of the MC on as to create a vacuum so the old fluid will not drain out of it. ((Does that little trick work...or not? I'm just guessing.

Or, do we go ahead and suck it dry, then top it off, then while we're changing the lines do I need someone there to keep topping it off with new fluid as it dribbles out of each line?

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