I am having a headache trying to figure out why my engine is getting extremely hot and why my rad fan is not on. A week ago I blew one of my freeze plug out and all my radiator spill out leaving my car to overheat a little. I replace the freeze plug and now my engine is getting extremely hot to the point where I cant even touch the valve cover. My rad fan is not coming on either. I replace the thermostat and rad cap. What could it be? coolant sensor, bad radiator, fan relay control, relay, etc... Please help!!!!!

 

Head gasket is really the only way you can blow out a freeze plug. Burp your coolant system maybe u have some air in there.

 

You likely have air in your coolant system. You need to bleed it.

Jack the front of the car up, drive it up ramps, something thatll get the radiator higher than the engine. Open the rad cap. Start the car.

Allow the car to come up to temperature so it pulls coolant in, be sure to keep the radiator full. Once you begin seeing air bubbles, give the coolant hoses a few squeezes to aid the burping process. Keep adding coolant til it doesnt pull in any more and you dont see any more air bubbles.

Why the fan isnt coming on, Im not sure.