there could be to problems the lines vcould be airlocked or there isnot enought coolant in Bad water pump. Incorrect thermostat or installed upside down. Spring goes toward engine. Cooling fan not working due to blown fuse, bad fan motor, or defective thermal relay. And possibly air in the system. Bleed the system by using bleeder valves if equipped or by jacking up the front of the car, and removing the radiator car,(Engine Cold), start the engine and let it run until no more air escapes. Keep it full.
Check the radiator fan operation.
Try replacing the radiator fuse relay
Your thermostat might be stuck open. Does the radiator cap get hot after running the engine for 10-15 minutes? If not, replace the thermostat.
First you need to run the engine until the thermostat opens, you will see the water running through the radiator. the coolant will go down into the radiator You need to continue to add coolant until you don't see anymore air coming up, or coolant go down into the radiator maybe three times that the thermostat opens. When you have got most of the air out you will see the water running inside of the radiator then stop when the thermostat closes. Cycle it two or three times to be sure.
That depends on the thermostat. If it's a 185 thermostat, the engine should run at 185. If it's running too hot, check the thermostat, radiator and water pump. If it's running too cold, replace the thermostat.
This is likely a stuck thermostat.
Coolant level low? Check when cold Cooling fan not working? Thermostat not opening? Dirty or clogged radiator? Bad radiator Cap? Water pump bad?
Your cooling system needs to be bled out real simple process depending on the size of the motor but the only thing is wrong is that once the radiator was removed air got in your cooling lines and needs to be bled out
Make sure the radiator is full of water, don't just check the overflow tank, but do make sure the car is cold before removing the radiator cap. Also the thermostat could be frozen closed or you could have a failed water pump. Try replacing the thermostat and flushing the cooling system first. Don't forget to buy a thermostat gasket when purchasing the thermostat.
broken thermostat; blocked hose to radiator or hole in hose; leak in radiator; etc..
Either: 1) Thermostat is bad or 2) Radiator is clogged or 3) if your losing fluid or hearing a noise, check your water pump. If your not losing fluid or hearing a noise, the service the radiator by having it flushed. If this doesn't solve your problem, then change the thermostat. If your still having the problem then your radiator may need further service or even replacing. I'm having the same issue right now. I'm replacing my thermostat next. If it still is running hot, I'm going to take the radiator out and have it serviced. Good luck! And remember, DONT let the temperature get in the red!!
Radiator fan inoperative, thermostat stuck closed, coolant low, radiator restriction, etc.