I put a new brake master cylinder on my 83 rx 7 and bleed my brakes about 3 times and pedal is still soft can anyone help thanks

 

take it to a brake shop and have hook up a power bleeder. shouldn't cost that much.

 

Did you bench bleed the master cylinder before you put it on the car? Also, is it rear drums or disc?

 

Yes i did bench bleed the master cylinder first also the rear is disk brakes

 

What sequence did you bleed it in? rx7doctor

 

right rear, left rear,left front, right front is how i bleed them

 

Go down to napa and get some speedi bleeders that go on the calipers, they are one way bleeders, they are probably around $30 aset that means total for front and rear. This way next time you have to change fluid it will be much simplier and c heaper than having someone do it. rx7doctor

 

Just did mine this weekend. I also have rear discs. Had the same prolem. I learned that the stupid "one man" bleeder kit was the problem. When I had it hooked up to the driver's front disc, I could see the fluid (along w/bubbles) going back into the line after letting up off the pedal. Therefore, I knew I was getting no where.

Problem was solved my getting my wife to help by pushing the pedal down. Had her first, push the pedal down and hold it there, then I would crack the line. Kept doing that till I got a good 12"+ long squirt out of all 4 lines. Brakes on a dime now!

 

The key is (2) people........

 

Oh yeah, and when installing new m/s you have to reverse the "normal" order of bleeding. You start with the closest wheel to the m/s and work away from it. Otherwise, you'll never get all the air out. This order should be: LF, RF, LR, RR.

You method of bleeding is correct any other time. It's just in this case you are starting with air at the very beginning of the system rather than at the end....

 

The new brake master cylinder they sent me was bad so i bench bleed my old one an it is working fine now thanks

 

When I changed master cylinder, I noticed it wouldn't work unless the car was beld in sequence. Rears, then front right, then left front (I think it was). The rears not so important, either side first is fine.

The front is the important one. It actually states it in the Haynes manual.