The car won't start. I think it might be a radiator issue.
Generally a radiator is not going to cause a car not to start - it is only a heat exchanger for the engine coolant. I think your problem would be more drivability in the fuel (fuel pump injectors fuel lines) or spark (ignition coil, sensors) systems, have a mechanic from YourMechanic test for fuel pressure and spark to see where the problem originates.
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