This happens when the brake booster push rod is adjusted out too far which does no allow the brake master to return fully holding the brakes on. To confirm the issue loosen the brake master mounting bolts 3 turns to see if the car starts to roll again, if so remove the master and adjust the booster push rod inward. Also a brake flex hose can come apart internally causing a short of check valve in the system but this is usually isolated to one brake either front or rear. I need you to check something. Since the calipers are new, try this. Pump the brakes so the front wheel locks. Release the brakes. Next, open the bleeder on the new caliper to see if the wheel will then turn. If it does, replace the rubber brake hose to the caliper.
When they get older, internally they break down and allow fluid to be forced through to actuate the brake, but the back pressure isn't there to release the fluid back to the master cylinder. If it releases when the bleeder is open, the hose is the likely cause.
Here are directions specific to your vehicle for hose replacement. The pics below correlate with these directions.
Caution: Refer to Brake Fluid Irritant Caution in Service Precautions.
Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in Service Precautions.
1. Raise and suitably support the vehicle.
2. Remove the front tire and wheel assembly.
3. Clean all dirt and foreign material from the brake hoses and brake pipe fitting.
Important: Install a rubber cap or plug to the exposed brake pipe fitting end to prevent brake fluid loss and contamination.
4. Use a backup wrench on the hose fitting, disconnect the brake pipe fitting from the brake hose, then cap or plug the brake pipe fitting end.
Do not bend the brake pipe or the bracket.
5. Remove the brake hose retaining clip from the hose mounting bracket.
6. Remove the hose from the bracket.
7. Remove the brake hose to caliper bolt (4) from the brake caliper (2).
8. Remove the brake hose (5) from the brake caliper (2).
9. Remove and discard the two copper brake hose gaskets (3). These gaskets may be stuck to the brake caliper and/or the brake hose end.
Important: Install NEW copper brake hose gaskets (3).
1. Assemble the NEW copper brake hose gaskets (3), and the brake hose bolt (4) to the brake hose.
Notice: Refer to Fastener Notice in Service Precautions.
2. Install the brake hose to caliper bolt to the brake caliper.
Tighten the brake hose to brake caliper bolt to 54 N.M (40 lb ft).
3. With the weight of the vehicle on the suspension, install the brake hose into the bracket.
There should not be any kinks in the hose.
Align the hose fitting with the notch in the bracket. Use the hose paint stripe as a visual aid.
4. Install the retainer onto the hose fitting at the bracket.
5. Remove the rubber cap or plug from the exposed brake pipe fitting end.
6. Connect the brake pipe fitting to the brake hose:
* Use a backup wrench on the hose fitting.
* Do not bend the bracket or pipe.
Tighten the brake pipe fitting to 18 N.M (13 lb ft).
7. Install the front tire and wheel assembly.
8. Ensure that the hose does not make contact with any part of the suspension. Check the hose in extreme right and extreme left turn conditions. If the hose makes contact, remove the hose and correct the condition.
9. Bleed the hydraulic brake system.
10. Lower the vehicle.
Check out the diagrams (Below). Please let us know what happens.
Images (Click to enlarge)
Wednesday, March 10th, 2021 AT 7:54 PM