Front disc brakes locking up, 72 Duster

oldirish said

Looking for ideas.

The front brakes get very tight while driving. Off the ground you can't turn the wheels by hand.

Once the car cools off, 20-30 min, the wheels turn.

With the brakes locked If you break the bleeder or hose connection the brakes release.

Thanks for any help.

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REPLACE the phenolic caliper pistons with steel or a hybrid phenolic with metal. Phenolics are ok when used regularly but they absorb moisture that increases the diameter and expands when the pistons get hot. The moisture cannot easily escape quick enough to prevent piston expansion. This has been a problem for all the domestic mfgs, especially RVs that sit for long periods.