Got home from work the other night and heard a weird bubbling sound coming from the engine bay. Popped the hood and opened the coolant reservoir to find coolant bubbling back up into the reservoir. (I'll add the video below). I have been running slightly above average temperature with the gauge sometimes spiking to very hot and then back down to normal. The thermostat and water pump are both new, put them in at the beginning of the year since my old one crapped out and put all new coolant in at the time too.
I am planning on flushing everything today and putting all new coolant in. Just wanted to see what everyone thought might be happening because I have no idea.
It's a 4.0 I6 btw and my Jeep is a 2000. I am assuming the radiator is still the original but I'm not 100% sure.