After getting an oil change, the place I went to mentioned I need some coolant service. I searched around to get another price and opinion. The mechanic I went to told me that I have a coolant leak and that I would need a new radiator. Thing is, everything else is fine, the hoses and the radiator itself are all in good condition. The problem is that theres a small leak coming out of the radiator drain petcock and when the mechanic went to take it out, it was stuck and kind of just kept spinning around without loosening or tightening.
Is it possible to just replace the petcock or is a entire radiator replacement necessary?