First things first, taking out the thermostat actually HELPS your car overheat so you should put it back in, you see it works two ways, in the winter it keeps coolant in the engine so it gets warm faster and stays that way, in the summer it allows the coolant in the radiator to dissipate heat by staying there longer, taking out the thermostat just lets it all get to the same high temperature.
Secondly, when you say coolant not going into radiator, well that screams bad water pump, with the car running and radiator cap off observe the coolant that you can see, is it swirling and moving all around? if no then your water pump is bad, if it is then flow may be low, radiator may be clogged. If you have been using anything but 50/50 coolant water mix then a lot of water passages may be clogged with corrosion, a good flush might help, but it sounds like you are beyond that stage.
Blown head gasket?
You must check the coolant level in your radiator and reservoir. Low coolant levels can lead to overheating. If it's low, you may have a coolant leak that needs to be repaired. Good luck!
Reasons Of Overheating # Insufficient coolant in system # Water pump defective # Radiator core blocked or grille restricted # Thermostat faulty # Electrical cooling fan inoperative or blade broken # Radiator cap not holding proper pressure
Probably the thermostat is sticking.
Thermostat, water pump, radiator cap, headgasket, low coolant.
when overheating occurs at highway speeds the cause is usually. a radiator or coolant circulation problem, Check for a restricted or clogged radiator.
Low coolant, failed water pump, restricted radiator, inoperative radiator fan, thermostat,
Low on coolant, radiator fan inoperative, thermostat failed, water pump failed, radiator plugged
If there is no fluid coming from the radiator to the thermostat housing, it could be due to a blockage in the coolant system, a faulty water pump, a stuck thermostat, or low coolant levels. It is important to investigate and address the issue promptly to prevent overheating and potential damage to the engine.
Could be from a variety of things. Commonly overheating occurs when the car is low on coolant, broke thermostat or the radiator needs repairs.
your thermostat is closed. needs to be replaced. inexpensive part but can save your engine from overheating.
If it's overheating, it cold be thermostat, radiator or possibly other problems. If it's not overheating it could be the coolant level sensor.