Brake bleeders

[Ronsant]

It depends on the car. You may have to cycle the ABS control unit.

So I would need a scan tool that includes that function?
This is getting expensive..LOL…

 

[vavavroom]

So I would need a scan tool that includes that function?

Yes

This is getting expensive..LOL…

Ideally, tools are a one-time expense. The more vehicles you service the less should cost of tools be a concern.

 

[shortyb]

What about ABS? Does that change the process with these pressure bleeders?

Unless you open the system somewhere other than the bleed nipples, ie; replace brake line, M/C, other component, you should not have to cycle the ABS generally for a simple fluid exchange. I say generally, because there are always some that require the ABS pump to cycle for a flush. Check the service manual procedure. I know in my cars (all VW at the moment) I do not have to cycle the ABS pump/circuit for a simple fluid flush. When I did brake lines in my GTI, yes, I had to cycle the system and used VCDS (scan tool) to do it because of the possibility that air could have entered the ABS circuit. Simple to do, but backwards from conventional bleeding. Start with LF instead of farthest away etc. Pressure DOES have to be sufficient to get fresh fluid past ABS circuit though, so make sure it is at least 10psi. My working pressure is 15 psi when I flush and never had any issues. I always go and drive in some area of lesser traction so the ABS can activate a few times to move fluid through the circuit before a flush too. Not absolutely necessary, but hey, it's fun to do.

 

[Rust_Belt_Pete]

In fords its annoying 2 person job. Use the computer to start the procedure have some person crack the bleeder and push on the pedal when the ABS bleeder cycle runs.
I think this one instance when the speed bleeders shine.

 

[eljefino]

Prius definitely needs the scan tool or will brick itself. Rear axle (at least) is done by computer (drive-by-wire) and will freak if it senses an unwarranted decrease in pressure. Won't let the car out of Park if that happens!

 

[JHZR2]

Motive looks best, I've had some positive results with a vacuum bleeder (which is good to have around in general) but I might just start using the 2 person method going forward, less tools in the shop, rather than get the Motive. Too many one time use things hanging around.

Brake fluid changes should be a routine service, not a one time thing.

 

[JHZR2]

Prius definitely needs the scan tool or will brick itself. Rear axle (at least) is done by computer (drive-by-wire) and will freak if it senses an unwarranted decrease in pressure. Won't let the car out of Park if that happens!

Wow that’s a terrible design from a serviceability perspective. I wonder what the design rationale is?

 

[Duckless]

Wow that’s a terrible design from a serviceability perspective. I wonder what the design rationale is?

Rationale: more money to unbrick the car AND get the service job for the dealer.

 

[Rust_Belt_Pete]

Wow that’s a terrible design from a serviceability perspective. I wonder what the design rationale is?

I am ASSuming it has something to do with regenerative braking?

 

[LordNilesStandish]

This is great!
Looks like the Motive bleeder is the most popular?

 

[Duckless]

If you mount the motive to the reservoir and pump fluid into it, how do you not have an overfilled mess when you take it off at the end?

 

[vavavroom]

If you mount the motive to the reservoir and pump fluid into it, how do you not have an overfilled mess when you take it off at the end?

The laws of physics work in your favor.

 

[The Critic]

Although I prefer my electric pressure bleeder, the Speedi-Bleeder works extremely well for the money. I had mine built with two in-line regulators (for redundancy) and it is outfitted for shop air. I dislike the idea of drawing moist air from a tire and much prefer using dry and filtered compressed air.

 

[97prizm]

Now I have got bitten by the 'regular brake fluid flush' bug, I'm looking at a new bleeder.
I currently have the little hand held vacuum pump which is great for sucking out reservoirs but get a bit fatiguing bleeding brakes.
What are other people using?
I don't have a shop compressor but I can hook to a 12v tyre compressor with standard fittings.

I picked up a kit years ago from Harbor Freight, but don't remember the name off hand. It came with a bleeder bottle, hose, and a bottle that you fill with new fluid and adapter clip to the brake reservoir. Definitely was worth it.

 

[YZJB]

Prius definitely needs the scan tool or will brick itself. Rear axle (at least) is done by computer (drive-by-wire) and will freak if it senses an unwarranted decrease in pressure. Won't let the car out of Park if that happens!

Ignition on, open a rear bleeder, push and hold brake pedal, fluid will be pumped out. Foot off pedal, close bleeder. Done.