Radiator coolant boiling

Hi! This is Bo with Car Genius at RepairPal! Boiling is for eggs not coolant! I'd start by making sure the radiator fan is functioning correctly or at all. It also could be a stuck thermostat or a failed water pump. The water pump fins can deteriorate making it nearly impossible to tell if it's circulating coolant or not. Also, once you've found the issue and addressed it, make sure you perform a chemical test to check for exhaust gases mixing with the coolant. If you have any other questions feel free to call us at 877-913-1554! We'll be happy to find you a certified shop in your area!