Yes. There should always be some coolant in the overflow tank. Its level should rise when the engine warms up, and it should go back down when the engine cools.
Hey Ken==Check the coolant in the radiator WHEN THE ENGINE IS COLD. Sometimes the coolant recovery bottle wilpopiooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooool still have coolant but the rad low. GoodluckJoe
Low coolant? Thermostat not closing allowing engine temperature to rise? Plugged heater core? Air bound heater core? Water pump not circulating coolant?
The coolant is no longer circulating after the engine is shut down. It is normal for the temp to rise for a short time after you have shut down an engine.
A bypass solenoid valve speeds up the warm up phase of an engine, and a faster temperature rise in the passenger compartment is achieved.
A few of the reasons: 1. So that the coolant does not leak out of the system. 2. So that the coolant can be made to circulate through the pipes (pressure is required). 3. So that Pressure can build up in the cooling system. This allows the coolant to reach a higher temperature before boiling. Once at its boiling point, the temperature will not rise, and additional cooling is inhibited.
Cooling systems differ, but most are pretty basic and operate at a set pressure. As the engine warms and the thermostat opens, it allows circulation of the coolant and pushes the hot from the motor to the radiator to cool before re-entering the engine. As the general temperature of all coolant reaches a normal, the pressure increases slightly due to the hotter temperature and a little steam. If its only a small rise in the fluid level of the reservoir and your engine runs at its normal temperature, its probably the normal way its designed to function causing a pressure vacuum that draws into the reservoir if pressure is above normal while at temperature and wept back into your radiator as your engine cools and depressurizes. Beware of an excessive amount entering your reservoir and higher than normal operating temperatures, because this may be a sign of a head or head gasket failing and allowing excess gases and air to escape the cylinder thus pushing the coolant out of your system and into your reservoir.
When you switch the A/C on, the A/C compressor engages and puts an extra LOAD on the engine. The engine has to work harder to drive the A/C system. This extra load causes heat inside the engine and the coolant must carry this extra heat away. As the coolant picks up more of the heat, you will see the temp rise. Once you disengage the A/C, the coolant doesn't have this extra heat to carry so the temp goes back to normal operating temp.
Low coolant? Thermostat not closing allowing engine temperature to rise? Plugged heater core? Air bound heater core? Water pump not circulating coolant? Heater control cable not adjusted properly? Bad selector switch?
Have you had the coolant temp sensor checked? It might be that the engine is running hot but the sensor isn't showing the temp is hot.
the engine gets hotter and that makes the temperature rise and could sometimes break down the car if it is to high
Thermostat is the part which functions to maintain engine coolant temperature by restricting the flow ( open and close based on the coolant temperature ) to the heat exchanger ( radiator). Water temperature sender ( water temperature transducer ) is the one which signals the the water temperature gauge. so water temperature sender may not work and show the same value on the gauge. but engine temperature will rise and vary depending on the load. the engine will be cold when you start the engine after an overnight and if you touch some safe parts of the engine you will feel the temperature rise even if the gauge does not indicate it. hope this will help you. thank you.