Master cylinder, How you know when its time.................. Options

[eyecolor]

I have 4 beautiful rebuilt calipers thanks to Eric and PNB . I have already used 2 quarts of fluid and the pedal is still soft.

I have been very careful to bleed in the proper order with no air being introduced.

The back calipers close nicely during the pumping and the fronts move a little.

I did note someone mentioned bleeding the proportioning valve.

I have no leaks anywhere!!

Is it time to replace the master cylinder or am I giving up too soon.

I also have an an old pedal cluster that I may owe someone as a core replacement.
Let me know if it is you or I can send it to anyone with the best advice that can use such a mess.

thanks

George

Wilmington,DE

[VaccaRabite]

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try the long tube method before replaceing the master cylinder. That was how I got my initial bleed for the 914, and it has been great.

Set the tube on the caliper furthest from the master (pass rear) and just start pumping away. when that one is solid, move to the next furthest way. it won't take nearly as long, but there will be air in the system yet. Keep moving until you have done all 4 corners. it will take a little time. A LOT of air got into the system when you replaced the hard and soft lines. Now you have to get that air out. Since the fluid goes back into the brake fluid res. you also don't have to worry about the res going dry and introducing air into the master. Just make sure that the res does not go dry before fluid from that rear pass caliper gets there - you might need to do one fill up.

Zach