[BlueMonster]

Well talk about dumb. I replaced the rad and it is still overheating. So I did some experimenting and found that if I keep the upper rad hose disconnected from the thermostat housing, no coolant flows out of there when it's supposed to. The thermostat wasn't open. I pushed on the top of it with a screwdriver and coolant squirted out. So I took the thermostat, along with the other 3 thermostats that I tried and put them in a pot of water on the stove with a thermometer. At 180 degrees, the thermostats opened like they were supposed to. So I know the thermostats are good. I put the thermostat back in the engine and started it up. At 230 degrees, the thermostat opened a bit and coolant started "trickling" out. I think that means, I have a problem maintaining pressure in the system, right? Everything is new including the rad cap, so I am not sure what the heck is going on. The compression checked out ok. So what now?