Air bubbles remaining in the system
A bad thermostat, or in rare cases, a bad water pump.
A bad water pump or thermostat can cause an engine to overheat. A plugged (clogged) radiator or heater core may also cause an engine to overheat.
Running it while leaking can cause it to overheat repeatedly, which can cause thermostat damage , along with other problems.
There are several things that can cause your cooling system to overheat. The next thing you should check is the thermostat. A blown head gasket can also cause the system to overheat.
You have a blown head gasket.
If you are unsure if it is heating because of a water pump or a thermstat, you can find out by removing the thermostat. If it still heats without a thermostat, then you know it is the water pump. Without a thermostat, the water flow has nothing to cause it to heat unless the water pump fails to circulate the water. No circulation of the water would cause the over heating.
Water pump not pumping or a pluged radiater
Assuming it did not overheat before you replaced thermostat and water pump you may have installed the thermostat backwards. It is also possible the cooling system wasn't refilled properly and was air bound.
low on water or bad thermostat
Could be many things. Rad., Fan, thermostat, fan sensor, water pump, blocked passages.
first , the thermostat could be stuck. try replacing it. if your radiator OS losing coolant, there may be a leak in the radiator causing it to overheat, or the water pump could be bad. thermostat is the likely cause if it is not losing water.
No, but faulty water pump or thermostat can.