[Peugeot-L] 84 505 STI bleeding bloody brakes

From: kenneth parker <elkeni_at_mac.com>
Date: 09/08/05

        I recently did a front wheel brake job on my 84 505 sedan. I removed the calipers, honed the cylinders (even thought I know the seal and piston are what makes the brakes function properly), lubricated everything and installed new seals and dust covers and pads. Everything seemed to work well.

        I pressure bled the system with a bleeder that screws into the cap of the fluid reservoir. I went through the system two times and still have a pedal that leaves something to be desired.

        A couple of potentially noteworthy details: a) before I did the fronts I changed the proportioning valve (rear). I did not, as many and the manual suggested, place the car on a hoist and add weights to the arm. When I bled the rears (when I changed the valve) I went through them two or three times. Also, b) when I changed the valve (last month) I seemed to get a very limited flow from the rears when I opened the bleed nipples. This was the case when I recently bled the system after doing the fronts.

        Anyhow, the last time I went through the bleeding routine without the pressure bleeder, I had my wife work the pedals and bled the system the old fashioned way. The pedal still feels a bit spongy and I am beginning to think that the master cylinder may be at fault.

        I was/am curious if anyone out there could provide me with a bit of master cylinder diagnostics. I am quite sure that I bled the system properly and I still get a lousy pedal. Any suggestions appreciated. Thanks,
Ken

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