Brake bleeding

[SnowDrifter]

DOT 4 has a higher boiling point than DOT 3 so it’s more heat resistant.

It is has higher viscosity so it works better with antilock brakes.

https://www.google.com/amp/s/blog.amsoil.com/dot-3-and-dot-4-brake-fluid-whats-the-difference/amp/

Dot 4 LV works better with abs for what it's worth. Minor, but there.

That being said enough of the stuff is dot 3/4 now so YMMV

Unless you have stabikitrac or Awd, rear lines are a shared circuit with the split at the diff. First one will take a while to see clean fluid. Second, much faster

Reservoir is about a quart. And if you flush to clean on all 4 corners, it'll take about another quart.

You can go lazy and just open the bleeder and let them drip. Pedal bleed for a couple pumps per caliper all around and you're set

Don't run your res dry, and don't pour fluid in it while you have a bleeder open. More apt to suck in an errant bubble introduced from pouring

 

[JonnyTahoe]

Just did Driver side rear Caliper install last week. Gravity bleed almost a quart of Green fluid. What's the deal with it turning green age I guess. All the calipers were Original so 20 year old fluid.

 

[JonnyTahoe]

One at a time and start furthest from master culver and work your way closer.

Make sure you don’t push the pedal too far in or you may cause damage. 1/2 way should do it.

Wish I would of read this before I did my rear caliper. Never considered damage to the master by pressing to far. Got lucky everything works.

 

[RobsFreeland]

Thanks everyone on this thread for ideas, smarts and experience. Just bled the brakes on the 04 Tahoe. Went around twice and replaced a quart+ . After 200000 miles I think it was ready. A funny green color. Still need to replace front pads, never been done either.

 

[Livebai8]

Ok...old post I started but now I changed my front brakes. Did the one man bleed on rears and all came out fine...no bubbles either side. I get to the passenger front side and very little thru the tube although the bleeder has fluid coming out. Tried self bleed, then two man and hardly anything. I go and buy a pneumatic bleeder and finally start to see fluid but a **** ton of air bubbles...did that for an hour and still air bubbles. The fill canister fluid also was doing it's job I guess but that fluid has turned dark. Do i keep at it with the pneumatic one? Can it really take this long? Anything else I should be looking for? I'm wondering why the fill canister fluid turned dark when it was filled with new fluid.

 

[JonnyTahoe]

Thanks everyone on this thread for ideas, smarts and experience. Just bled the brakes on the 04 Tahoe. Went around twice and replaced a quart+ . After 200000 miles I think it was ready. A funny green color. Still need to replace front pads, never been done either.

 

[JonnyTahoe]

Mine was a really dark green probably 10-12 years since system was last bled. Took over a quart to flush the old fluid out. When its green its way over due for a fluid change.

 

[OR VietVet]

I have seen green fluid a couple of times and when the brake fluid is dark, it gets darker over time, it has a lot of moisture in it and does internal damage to all the components that the fluid travels thru.