Probably stupid brake bleeding question

Kinja'd!!! "shop-teacher" (shop-teacher)
11/15/2015 at 00:22 • Filed to: None

Kinja'd!!!0 Kinja'd!!! 13

It’s late and I don’t feel like researching. I replaced a rear brake line on my Roadmaster. Do I need to bleed at all four wheels? Or is bleeding the rears enough?

I’m guessing all four.

Here’s the bastard I had to replace. It’s the hard line that goes from the top if the pumpkin to the right rear drum. It rusted through on top of the pumpkin.

As you can see I bad some “fun” with brake line flare kits.

Kinja'd!!!

DISCUSSION (13)


Kinja'd!!! AddictedToM3s - Drives a GC > shop-teacher
11/15/2015 at 00:24

Kinja'd!!!1

Fairly sure you have to bleed all the brakes (I could be wrong though).


Kinja'd!!! sdwarf36 > shop-teacher
11/15/2015 at 00:27

Kinja'd!!!1

If the master cylinder didnt go dry, you just need to bleed the rears.


Kinja'd!!! JGrabowMSt > shop-teacher
11/15/2015 at 00:29

Kinja'd!!!2

Someone can feel free to correct me, but I’m pretty sure you bleed the rears first, then you bleed the fronts, but I would definitely just go ahead and do all four while you’re at it.

It’s a bit late at night, and I should already be asleep, but there is one side you’re supposed to do first..


Kinja'd!!! shop-teacher > JGrabowMSt
11/15/2015 at 00:31

Kinja'd!!!2

I know you’re supposed to start farthest from the master cylinder, and work your way closer.


Kinja'd!!! Birddog > shop-teacher
11/15/2015 at 00:35

Kinja'd!!!1

Rear only bleeding will work fine. I went through this with Crusty not long ago. If you need help let me know.


Kinja'd!!! Berang > shop-teacher
11/15/2015 at 00:37

Kinja'd!!!1

Dual circuit brakes? If so just bleed the rears.


Kinja'd!!! AMGtech - now with more recalls! > shop-teacher
11/15/2015 at 00:37

Kinja'd!!!4

If you only opened one branch and didn’t press the brake pedal or let the master go dry just bleeding that one branch should suffice. If not, you will know rather quickly. That said, best practice is all four and new brake fluid, even if there isn’t any air, is better than old brake fluid.


Kinja'd!!! ly2v8-Brian > shop-teacher
11/15/2015 at 01:07

Kinja'd!!!1

You should be fine with just the rears. They are on a separate circuit I believe.


Kinja'd!!! 6Cylinder > shop-teacher
11/15/2015 at 02:28

Kinja'd!!!1

Well technically, you would only have to bleed the rears since air most likely didn’t make it into any front brake related components or the master cylinder. Unless, you hit the pedal sometime while the system was open.

But to be safe you really should do it all.


Kinja'd!!! shop-teacher > AMGtech - now with more recalls!
11/15/2015 at 04:45

Kinja'd!!!0

That makes sense. Thanks!


Kinja'd!!! shop-teacher > 6Cylinder
11/15/2015 at 04:46

Kinja'd!!!0

Gotcha. Thanks!


Kinja'd!!! shop-teacher > Birddog
11/15/2015 at 04:48

Kinja'd!!!0

I put a call into my auto shop teacher buddy, but if he’s busy I may take you up on that.


Kinja'd!!! shop-teacher > Berang
11/15/2015 at 04:49

Kinja'd!!!0

Yep, dual circuit brakes. Thanks!