but only temporarily.
A thermostat functions to regulate the flow of water between the engine and radiator.
On an average outside temperature day (75 degrees), "no thermostat" would result in (1) the engine not reaching operating temperature in the normal engine warm up cycle time and (2) much later in the cycle the engine would overheat caused by the water not remaining in the radiator long enough to cool down. More extreme outside temperatures would impact the previous results.
No thermostat or a defective thermostat that is stuck open. Also could be a deffective coolant temprature sensor. Or air bubble aroune the sensor on some cars.
The normal engine operating temperature for a 1987 Mustang GT is around 200 degrees Fahrenheit. Anything above 220 degrees Fahrenheit might cause the engine to overheat.
From 20 to 40 pounds PSI when the engine is at full operating temperature is normal. Any reading below 20 PSI may be cause for alarm.
Transmission fluid level possible cause. This fluid level can only be checked with the engine running and at normal operating temperature.
An engine might sound like a diesel at operating temperature if the engine was a diesel or if there was an issue with the manifold. Sometimes gases escaping the manifold cover could cause the engine to sound different.
Replace {Thermostat}, It is in a closed posistion and is unable to open. Another cause as with the Futura (1.3 Fiesta year 2000) is a valve between the heater and engine, the Thermostat shows normal operating therefore replacement is not needed.
Best way to tell your normal operating temperature is to visit an auto parts store and ask them what the OEM thermostat temperature is (or you can look it up yourself on Autozone.com). Most cars these days will have around a 190 degree thermostat. Your car will run slightly hotter than that temperature as it is needed to maintain the thermostat in an open position. With that thermostat you can expect to see the temperature of the water stay around 205-210. If the water temperature ever starts to get above 240 you should shut the engine down to avoid damage and have the cooling system checked. Temperatures above 260 WILL cause significant engine damage.
Could be due to the fact that cooling fan is not working and excessive temperature is causing pressure rise.
Any Auto Parts store can tell you the correct temperature thermostat for your Impala. Probably it requires a 195 degree thermostat. One thing for sure is no thermostat is not what you want. Running without a thermostat, will cause the engine to not reach full operating temperature. The engine will not perform to peak efficiency at below normal operating temperature. Normally that is around 220-230 Degrees. Your engine is computer controlled and the computer bases fuel/air mixture and timing on the engine temperature. Install the correct thermostat.
Rear main seal leaking? Valve cover gasket leaking? When engine attains normal operating temperature the motor oil will thin out and will possibly leak, where thicker (colder) oil will not.
A defective thermostat can cause the engine to overheat. It can also cause the engine to not reach full operating temperature if the thermostat is stuck open. It is possible this could set the check engine light.
A thermostat stuck in the open position could keep an engine from reaching operating temperature, the interior heater would also not blow hot air. This can happen when using hard water ( water with a lot of minerals in it ) mixed with antifreeze.
automotive manufactures are now using lights instead of gauges to save money and make it more user friendly. Blue coolant light in the instrument cluster means that the engine coolant temperature is still not at the normal operating temperature (cold). Normally happens at cold start (when you first the car up in the morning for example) It will turn off once the coolant temperature reaches normal operating temperature. Note: if the coolant light turns red, it means your engine is over heating and you should turn it off before you cause more damage.