Why can't I bleed my brakes ?

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ecurie

Why can't I bleed my brakes ?

#1 Post by ecurie »

During the restoration of my Sprint I rebuild my brake master cylinder and used new SS brake hoses as the system had not been used for 3 years.

Yesterday I filled the reservoir with fresh brake fluid and started bleeding the system. However nothing happened, the brake fluid stayed at the same level and no fluid came out of the calliper bleeding nipple.

I could feel a faint puff of air coming from the seal of the brake servo non-return valve when depressing the pedal.

Is it the seal that is at fault or is the piston inside the master cylinder refusing to move and thus forcing air past the non-return valve seal ?

I just don't feel like taking the master cylinder apart again.

Benoit
Sprint36

#2 Post by Sprint36 »

Benoit,

I had a similar thing happen to me. I think having the system full of air means the piston just compresses air and doesn't push any fluid down the lines. I think I just pumped like an idiot until it got started, but a pressure bleeding rig should work better.

David
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#3 Post by SprintMWU773V »

get a pressure bleeder like an eezeebleed it will force any air out and push the fresh fluid through.
Mark

1961 Chevrolet Corvair Greenbrier Sportswagon
1980 Dolomite Sprint project using brand new shell
2009 Mazda MX5 2.0 Sport
2018 Infiniti Q30
ecurie

#4 Post by ecurie »

Thanks,

I'll invest in an Eezeebleed then.
Mr.Speedy

#5 Post by Mr.Speedy »

Ceri wrote:
are you using the 2 person method of one person pumping the pedal then holding the pedal down while you crack the nipple open and then close it?
Ohhh.

I believe Vaseline helps ! :lol:
bifold

#6 Post by bifold »

I had this problem in the past,and the guys in the air-con firm next to me pumped the fluid from the nipple end of the system into the reservoir best peddle ever,prehaps some one could expand on the method?
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