Technical Tips > Brakes, Suspensions, Steering, Wheels & Tyres
Bled new Wilwood brakes but still spongy pedal
wabco40:
--- Quote from: jimandemma on March 18, 2018, 09:07:32 PM ---Are you using the standard proportional valve?
--- End quote ---
Yes, I am using the standard 71 valve, however in that year it's more of a distribution block.
sirfixalot:
This is a common problem every one changes calipers & master cylinder when i did my C3 years ago I removed the proportion valve disassembled cleaned & re-assembled with rubber grease. Had to blow it apart with compressed air. Have never had a problem since pedal is rock hard. I cleaned all lines with compressed air separately. Then flushed with metho used a bottle each for front & rear. I used a caulking gun nozzle on the bottle & squeezed bottle to force metho thru lines. Then compressed air let air dry for a day then reinstalled prop valve with new hoses, calipers, m/cylinder. Have been on car now for 15years have changed fluid a couple of times since with no problem.I also bled with back up in air furthest to nearest calipers
jimandemma:
Well, got in the Wilwood master cylinder and bench bled it first
jimandemma:
Set the push rod to the right length on the booster so it was touching the piston and attached the master cylinder, fluid still in it from the bench bleed
jimandemma:
Had to bleed the brakes using the pump and hold method as the pressure bleeder master cylinder attachment was too short. Solid fluid from nipples, no air?? Will have to make another pressure bleeder attachment to fit the Wilwood master cylinder. Pedal still goes to the bloody floor!!!
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