I'm installing new front calipers and a new master cylinder on my 93 accord lx. What I'm wondering is, should I install all the new components and then do a complete brake fluid flush? OR should I just let the front brake lines drain while the calipers are off, bleed the front lines through, and then flush the rear lines?

The reason I ask is, if I flush the lines with the new calipers installed, won't that be pushing the gunk in the lines through my new caliper piston cylinder?

Opinions welcome.

 

Well, you should follow the correct instructions for bleeding. It's not just bleed the fronts then bleed the rears. There is an order to it.

You are going to introduce air in the lines by putting on new calipers and the MC. Just get one of the nice air bleeders if you have access to one and go to town and do it all at once. I wouldn't worry about draining the lines prior to installing the new calipers.

 

If I do flush out the old fluid with new, I would certainly follow the bleeding order.

My concern though, is if I push out the old fluid through the bleeding nipples on the new calipers, won't that introduce gunk from the lines to the inside of my brand new caliper piston cylinders?

I'm replacing the calipers because both are leaking at the piston seals, and judging by the condition of the rest of the fluids in the car when I bought it recently, I'm guessing that the brake fluid is ancient.

 

Your right there you might as well put new fluid in the system. It dosent take much more work.

 

It's not going to hurt anything - draining the fluid before hand will give you the same results probably. You will just have to make sure you recognize the difference between the fresh fluid and old fluid.

 

it goes without saying that you should use a nice high quality fluid... whatever brand you prefer

I personally would do ATE Super Blue Racing DOT4, but Castrol GT-LMA is also a nice choice that is slightly more affordable

 

Proper bleed order for 4th gen (90-93) is left rear, right front, right rear, left front.