Brake Fluid Change - Flushing vs Dry-drain

victorbrca

victorbrca

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I'm going to be doing my rear brake fluid change for the first time... I've been doing some research and I've had people telling me to do a full drain (remove all fluid), while others say that this is a big no, and that I should be flushing (not letting level drop).

So which one is the correct one?

I also spend some money and bought a vacuum bleeder from PA (the hand pump one).

Thanks.
 
You could get blue fluid (ate brand) to be 100% sure all the old fluid is drained out, that's what I did.

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I see no reason not to do a full drain as long as you make sure there's no air bubbles left in the system after.
 
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Its gonna be a nightmare if you drain the whole system. But since its only rear shouldn't be that bad. I would just do a flush

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Some rear brakes can be ***** to get the m/c primed and pumping if completly empty, but since you have the hand pump you're golden. You can also use a windex bottle sprayer triger and tube for a make shift hand pump to get things started.
 
I personally drain the resivour and pour in fresh fluid before I start bleeding. That way your not mixing it in the reservoir and once it's clean coming out I do one more full reservoir of bleeding. Don't pump it dry there's no point and brake fluid collects moisture over time, that's why you bleed the system with fresh fluid.
 
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Another vote for flushing here. I suck as much fluid out of the reservoir as I can, then fill with fresh fluid.

I bought a pressure bleeder to make the car a one person job and it works really well, just crack the bleeder until I see clear for a while.
 
GreyGhost said:
Another vote for flushing here. I suck as much fluid out of the reservoir as I can, then fill with fresh fluid.

I bought a pressure bleeder to make the car a one person job and it works really well, just crack the bleeder until I see clear for a while.
Click to expand...

There's a trick to gravity bleed a car. One person
 
Easy way: Flush system.
Hard Way: Drain and spend the next few hours trying to get the air out of system.
 
Franko! said:
Easy way: Flush system.
Hard Way: Drain and spend the next few hours trying to get the air out of system.
Click to expand...


+1 Flush. Really doesn't take much time. You can see the clean fluid going through the system and the difference in the old.
 
I did the rear last week and it was pretty easy. But I have to say that my fluid still looked pretty new. Couldn't really see any difference in color between old and new.
 
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