Front brake pads will not release

Asked by Guru9WXR2C Nov 22, 2021 at 05:43 PM about the 1969 Chevrolet Chevelle Malibu 2 Door Hardtop Coupe RWD

Question type: Maintenance & Repair

I had the rotors machined to a new surface and put new pads in the original
calipers. I bleed the fluid, but when I apply the brakes and release them, the
pads stay tight against the rotors. How do I fix this?

6 Answers


Check the rubber brake lines, when they go bad they can keep the brakes applied. Another thing can be a bad master cylinder, the internal check valves are not releasing pressure.


Original calipers may be defective. Check: Calipers guide pins (they) could be bent, seized up or twisted out of shape, typically as a result of the effects of heat that you may not notice it at plain sight. Do not drive it until problem has been corrected. thanks!

I had also cleaned & lubed the caliper guide pins, and the calipers do slide by hand. And the rubber brake lines are new also. I have not removed the piston from the calipers to replace the o-ring. So that might be the cause? Or the master cylinder / booster. I've never worked on either, so I don't know how they disassemble or what to do.


You need the right tools to rebuild the calipers so most opt to just replace them. If the master cylinder is stock then that is also suspect.


is it happening at all wheels?.., whatever the answer was then check: Power Brake booster integrity_Check Valve and Vacuum chamber, Diaphragm, Pushrod adjustment, Operation and Air-tightness check. Master Cylinder_Primary/Secondary rubber cup, Return spring. Pressure regulator valve or HCU electrical connector and wiring. Brake lines and hoses. Single-piston Caliper_piston, piston seal:may be defective/malfunctioning, dust boot. Not sure thou but you may consider using brake pad support plates or brake shims. not being seen on picture. thanks.

Your Answer:


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