No Significant Brake Pressure, Brake Experts Chime In |
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No Significant Brake Pressure, Brake Experts Chime In |
Midtowner |
Jun 26 2006, 10:44 PM
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#1
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Ooooo! Group: Members Posts: 652 Joined: 21-December 04 From: Sunnyvale, CA Member No.: 3,316 Region Association: None |
I'm betting someone here has an answer. The Car: '73 2.0, 90,000 miles. 19mm master cylinder. Brake proportioning valve. New Zimmerman rotors and Ferodo pads front and rear. New inner and outer front bearings. New fluid. All parts installed by reputable shop in Silicon Valley. Master Cylinder not leaking. The Problem: Pedal pressure only results in gliding to a stop. Unable to lock the wheels.
Any ideas what's going on? (IMG:style_emoticons/default/huh.gif) |
jk76.914 |
Jun 27 2006, 12:45 AM
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#2
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Senior Member Group: Members Posts: 809 Joined: 12-April 05 From: Massachusetts Member No.: 3,925 Region Association: North East States |
We're all assuming air in the system, but you didn't say how the pedal feels, nor did you mention the calipers in you list of recent refurbishments.... If the pedal is firm, but the car still just "coasts" to a stop, then you may have sticking pistons in calipers. You can have one or both pistons stick in any given caliper, and it's pretty common with disk brakes that aren't used that often. Especially if they haven't had the fluid changed regularly over their life.
A related question and potentially helpful symptom- how is the parking brake working? Does it hold the car? No question about one thing- your shop should have found it. |
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