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FerrariChat.com » Technical Q&A Archives » Archive through December 07, 2002 » Soft brake pedal in '65 330 gt 2+2 « Previous Next »

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JRV (Jrvall)
New member
Username: Jrvall

Post Number: 26
Registered: 11-2002
Posted on Saturday, November 09, 2002 - 1:07 pm:   

>>>The plunger seal can leak air without spilling any fluid out causing you to lose your advantage in pumping the fluid.<<<

That's correct, also, common problem is seals leak internally allowing fluid to pass by seals (from one chamber to the next)reducing/eliminating the ability of the MC to build pressure.
Tony Fuisz (Fuiszt)
New member
Username: Fuiszt

Post Number: 3
Registered: 10-2002
Posted on Saturday, November 09, 2002 - 10:41 am:   

Car back today-master cylinder bad. Had it and both brake boosters redone by White Post-fast turn-around and brakes work.
Hubert Otlik (Hugh)
Member
Username: Hugh

Post Number: 264
Registered: 1-2002
Posted on Monday, October 21, 2002 - 1:06 am:   

Tony,

Re-bleed the lines 1st, also check the master cylinder.
Tony Fuisz (Fuiszt)
New member
Username: Fuiszt

Post Number: 2
Registered: 10-2002
Posted on Saturday, October 19, 2002 - 10:58 am:   

Pedal was initially firm-Calipers recently rebuilt-I was wondering if its just badly bled lines-thanks for the suggestion.
Frank Parker (Parkerfe)
Intermediate Member
Username: Parkerfe

Post Number: 1423
Registered: 9-2001
Posted on Saturday, October 19, 2002 - 9:39 am:   

Is the cyliner in the footwheel leaking air? The plunger seal can leak air without spilling any fluid out causing you to lose your advantage in pumping the fluid.
Tony Fuisz (Fuiszt)
New member
Username: Fuiszt

Post Number: 1
Registered: 10-2002
Posted on Saturday, October 19, 2002 - 9:20 am:   

Pedal gradually goes soft (but pumps up) after 30 minutes of driving. No obvious leaks of fluid, and reservoir still looks adequately filled.
Thoughts?

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