Chosen Solution

Coolant is boiling out of the coolant reservoir after the car warms up. However there is no white smoke out of the exhaust so I don’t think its a head gasket. There is a very small leak on the bottom radiator hose but its only like a drip every 2 minutes or so. I just installed this new radiator because the old one was cracked and I was hoping i would have no more problems. Does anyone know why this is happening?

If it hasn’t got bleed screws remove the coolant reservoir cap and run the engine at a little above idle and turn the heater and fan on full. Keep an eye on the coolant level. After a while it will start bubbling when it settles down and starts circulating top it up and replace the cap. If it has a bleed screw you would loosen that and leave the reservoir cap on. There should be YouTube videos on your make and model.