I ran my pick up for at least 20 years without a thermostat (in Florida) It was fine. UNTIL I went to Michigan during the winter! The engine coolant never got warm enough for heat! After 2 days of driving through a fog created by seeing my own breath, I put in a thermostat. HEAT, ahhhh! My truck is 33 years old now and still runs fine, despite 373,000 miles. Just a good, old Ford.
No. the engine will not run up to operating temperature. The radiator is designed to remove more heat than the operating temperature so when cooling is needed for temperature regulation the thermostat can open and allow the radiator to remove more heat because of more coolant flow. The person who gave you the idea that having no thermostat makes more heat is mistaken in their belief that thermostats create heat. They don't. They are simply a heat controlled valve to choke or allow coolant flow. You probably have a clogged radiator or other cooling system problems, such as failure to maintain pressure and allowing boilover.
The engine will run cold and will have acceleration and idle issues. Not to mention causing a big problem when the weather gets cold. If the car is overheating and you took the thermostat out..I believe it was something worse making it overheat , as a thermostat is the most inexpensive component you can buy.
WAIT A SEC. You wont be able to gauge it, but the engine WILL run hot. at the places where the heat is transferred through the casting to the water jackets.
The rush of coolant would be too fast without a restriction. The coolant would not be there for the heat transfer of conduction. Molecule by molecule, you would prevent heat transfer as they passed too quickly.
This can cause hot spots in the cylinders especially. It can crack or the rings can fail. Eventually many other places will suffer greatly.
Why not prop it open and reinstall it.
Then diagnose and repair it. when you get it to where you can do so.
As J and d say, without a thermostat, the water can circulate so quickly it isn't in the radiator long enough to cooldown, ie can run hotter without a thermostat than with.
ADDED: Those who say that engines will always run cooler without a thermostat are just plain WRONG. SOME engines may run cooler, SOME may run hotter . . . . but in my 40+ years or experience, more run hotter without a thermostat than cooler.......MANY cars come in with overheating symptoms and it's often a missing thermo, or one that is stuck open.
Another thing to consider: many engine and emission controls are dependent on proper coolant temperature: sensors relay temperature to the computer that controls fuel mixture, EGR, and other systems......therefore, the engine must run within a fairly narrow temperature range to function properly. If one is experiencing overheating problems, they shouldn't resort to "self help, shadetree mechanic" cures from 50 years ago - - - - but have the problem - such as a bad radiator or disfunctional fans - repaired.
No English grammar lessons? Will you compose a proper sentence correctly? You speak in this way? Also, are you not able to use Google Search to learn to locate information? What a car engine's thermostat does is amply covered online. This is atrociously bad grammar.
Depends why you had to pull it out. If you are trying to do it because of a head gasket leak or something in that area no it will not help. if you are doing it because of a sticking thermostat yes you can do it but it will take longer to heat up also that does open and close to allow the antifreeze to cool down a little more keep an eye on temp gauge if you do it on longer trips
You'll never get any heat out of the heater in the middle of the Winter with no OEM thermostat.
Possibly as the thermostat usually works as a restrictor to slow down the flow of water which aid in the cooling process.
it will run hot as coolant will never have time to cool down and in some engines it will cause hot spots
and some sensors rely on a certain engine temperature to function,
never run it without a thermostat . it will cool unevenly
it should not run hotter like that. fuel economy may suffer since the engine will have to work harder to warm up.
It shouldn't, but it won't get to proper operating temp.
IF the system is good condition it will run too cool.
Engine will overheat........
