2000 2.2 4dr Cavalier - Ran like top; no issues. Daughter rear ended cop car; minor leaks in radiator so put in Bar's Leak and tried to run it; overheated and brought it to house; I replaced radiator and condenser; filled it up and no leaks but runs super hot like it will overheat. Put in new thermostat, same problem. Removed tiny "pressure relief screw" in hard line, top right front of motor and no coolant coming out.
Try with thermostat out? Air lock? Needs good flush? Thoughts? Thanks in advance for any help!
You have air in the lines. Let the car cool and remove the radiator cap. Turn heat all the way to hot. Run car till it reaches operating temperature. Top off fluid. Look for foam in the coolant as that is sign of air in system.
Put cap on and drive car. With car running still, loosen the system bleed screw slowly and if fluid comes out in good stream, the air is gone. If not let the car cool and repeat procedure. If it happens again klet car cool and add coolant put cap on and bleed screw and continue to run and loosen bleed screw until it runs out in steady stream.
If this does not work then the leak sealant might have clogged something.