Need advice about pressure bleeding brakes

[Eric M.]

I have replaced the calipers on my 92 Protege and now need to bleed the brakes. I have a pressure bleeder, but my adaptors are too big for the master cylinder. I checked the shop manual for info. about bleeding the brakes, and all they mentioned was the 2 person method of punping the brakes and opening the bleeder.

Question: Can I even use a pressure bleeder with the small plastic type reservoir on the master cylinder?

If so, any recommendations as to where to find the correct adaptor to fit it?

Thanks,

Eric M.

[Tuomas]

I've never used pressure bleeder and cannot even figure out how it works(by done alone from the master cylynder),but i've used a vacuum bleeder and that's something you can do by your self.

[Mazda_Powered]

it's easy to do it with 2 people. You can also pick up speed bleeders and do it SOLO.

JACK.

[wheresthericego]

I love speed bleeders. The website doesn't have a listing for a protege or 323 but they do for an escort. They're pretty much universal anyways only like 7 different kinds

[Eric M.]

I picked up 2 adaptors for my pressure bleeder today and both caused leaks where it mounted to the top of the reservoir AND where the reservoir fits into the master cylinder. (Hope I didn't wreck any seals).

Is the speed bleeder the suction type that attaches to the bleeder nuts?
That might be worth picking up.

Thanks,

Eric M.

[SgtRauksauff]

I've got a Motive power bleeder, it actually does great work, especially at track days where I flush the system a time or two when the fluid gets too hot.

What I did to make it not work:

I got a couple brass fittings, and some O-rings, and a spare fluid reservoir cap.

I drilled a hole in the center of the reservoir cap, the inner white plastic part went to the trash. I put an O-ring on either side of the cap, where the brass fittings screwed together. (the outer one was male, with a hose barb, the inside one was female. the outer one screwed into the inner one, compressing the O-rings, and making a seal.

I also got a larger O-ring that fit inside the cap, the same diameter as the reservoir lip. Screw down the cap, which seals up the reservoir, attach the hose from the pressure bleeder, voila!!

Completely purged and bled all four corners and the clutch in about 10 minutes.

I got the Motive bleeder from Summit or Jegs, with a bunch of adapters (square, round, european standard ends) for whatever the going rate is.

My own BG specific adapter cost all of about 3 bucks for the O-rings and brass fittings.


--sarge

[Eric M.]

My own BG specific adapter cost all of about 3 bucks for the O-rings and brass fittings.
--sarge

I bought the adaptor pictured below a day or so before you posted this. Is this what you made? The threads on my unit don't match my master cylinder perfectly, so, it leaks when I hook up my pressure bleeder. I tried a clamp on adaptor, but the plastic reservoir leaked where it mounted to the master cylinder.


A few questions for you when you bleed your brakes:

What do you pressurize your bleeder to?

Do you ever have a leak where the plastic reservoir meets the master cylinder?

When I bleed my system, the fluid came out very slowly from the rear calipers, much slower than the front. I know the rears are regulated down, it just seemed like it was less pressure than I'd seen when bleeding other vehicles. I kept increasing the pressure of my bleeder and getting leaks at the adaptor. I'll admit, this was the first 4 wheel disc vehicle I've done. Is this normal?

Where would be a good place to get a spare cap to make an adaptor like you did? The dealer or should I post up in the WANTED forum here?

Thanks,

Eric M.

[MD323]

those rubber seals where the master cylinder and the reservoir meet are known for leaks. looks like its time to replace yours from the sound of it.

[Eric M.]

those rubber seals where the master cylinder and the reservoir meet are known for leaks. looks like its time to replace yours from the sound of it.

Is that a parts store item?

Do you need to bench bleed the master cylinder when you replace the seals?


Thanks,

Eric M.