Overheating
You need a no spill funnel . You can find them on Amazon for around 30$. Fill motor through top rad hose. Jack it up and run it with the funnel attached to rad full of coolant . Squeeze hoses to release air. This will take a while , but air should come out. The only other option is a vacuum filling tool they are like 80$.. You also need a 4 way mixer valve for heat. You cannot stop flow from heater core because it needs the flow to open thermostat . You can get one from a 2000 or so suburban





