so i had a fluidyne radiator for teg then a fluidyne civic in my teg. I swapped that out and put in a automatic oem civic radiator and now my car overheats but weird thing is when i open the hood i see the coolant resevoir bubbling. anybody have had this happen to them?

 

You probably just have air in the cooling system. Just wait until the radiator cools down and take the top off the radiator, turn on the car and let all let it warm up. You should see bubbles coming out the radiator wait until their is no bubbles coming out, I would say like 5-10mins. Put the cap back on and your done

 

k, that solves it for now. ill have to see on a hot day

 

i have same exact problem. it gots to be your thermostat. my car thermostat doesnt work and the fan doesnt spins, therefore my coolant reservoir boils