Explain the function of a thermostat in an automobile cooling system.
Why does this seem like a trick question? With that cowboy hat you look like you oughta know about thermostats. Every country guy has to have been under some truck parked under a shade tree 'a workin ' on it.
A thermostat in a car, regulates the temperature of the engine by allowing engine coolant to circulate between the engine and radiator. The thermostat is a mechanical valve that opens and closes, either allowing water to circulate or not to varying degrees according to the temperature.
Least that was the way the old cars used to work, I live in the southwest and usually pulled them out and threw them away, when theyd get stuck.
Your automobile engine circulates water through the radiator to cool itself down when it is running. The engine operates most efficiently between certain temperatures. Too cold and it wastes fuel, too hot and it can be damaged, sometimes permanently. The thermostat is there to keep the cooling water from circulating from the engine through the radiator until the water that surrounds the engine (sometimes called the cooling jacket) reaches a pre-determined temperature.
It is important not to run the engine for long periods with a bad thermostat (or with no thermostat), because this can cause overheating if it is stuck closed, and reduced gas mileage if it is stuck open. Also, if you need to change your thermostat, be sure to replace it with one that opens at the recommended temperature for the engine. If an engine is modified for racing, then a cooler thermostat is sometimes used to compensate for inadequate radiator sizing, since racing engines tend to run very hot.
Another side effect of a thermostat that is stuck open is that your car heater will take longer to warm up because the heater takes it's water from the engine, not from the radiator. So if the engine is cooling prematurely, then the water stays colder longer.
If having a good thermostat in your engine causes overheating consistently, then you have another issue. It could be a cracked cylinder head, a plugged radiator, or a bad water pump. Hope this helps.
Note to the readers...Maybe I should have qualified this question...I have a regular habit of asking questions to which I already know the answer otherwise how could I decide who gets the points! LOL! The desire is to see if YOU know the answer! Thanks much for your responses! WB
Using what basically amounts to a glob of wax trapped in a metal pill with a valve, it regulates the flow of coolant between the engine and the radiator... keeping coolant in the engine long enough to actually draw heat from it while keeping the hot coolant in the radiator long enough to cool it down. Based on the size and composition of that "glob of wax", it determines the operating temperature of the engine. (do I get any points/ =P)
a thermostat is installed at the coolant outlet in the blockor in the intake manifold to make the engine warm up faster.when closed it prevents coolant flow between the block and the radiator.thermostats have an expansive wax that expands after a pre-determined temp(stamped on thermostat)when temp(195 f-215)reaches a valve opens and allows coolant to flow.the rating is set so the vehical can operate at optimal engine temp.But if you're cooling system is a reverse flow(meaning thermostat is located at the top of the lower radiator hose at the inlet to the coolant pump)the thermostat will partialy open with increasing coolant temp. through the water the water pump.the cool coolant from the radiator will cause the the thermostat to close.this causes the engine to warm more gradually and the temp of the heater is more consistant.
by Sheena C. Vang 4 years ago
What's wrong with my car?My Honda CR-V begins to overheat when I break (waiting in the drive-thru line, traffic, traffic light, etc.) and has been doing it for the past couple of months. Only when I drive will it blast cold air. I'm not sure what I need to check or what I need to replace. Please...
by Moipone 6 years ago
What causes a car to over heat?
by Audrey Selig 5 years ago
Is programming thermostat best way to control home temperature, and will it vary by two degrees?What about override ability. Older people seem to have difficulty controlling heat and cooling and become confused about programming and times of day.
by Harry 4 years ago
This is for anyone who owns and has knowledge re the cooling system of the E46 3 series coupes.I own a 2006 325Ci in Sydney and today, WITHOUT WARNING, I lost all my coolant. .Soon after that, I realized my engine was overheating and went in the red-zone.. I pulled over after a few hundred meteres...
by Mollymay911 3 years ago
I have a 96 Chevy Tahoe and I have to stop and fill up the radiator resviour every time I drive.It empties out to nothing so I'm constantly stopping and filling it with water.I can't figure out where the leak is.it appears it' s coming from a hose right next to the resviour ? What could be draining...
by Sondra9 4 years ago
Water pump is missing a bolt, is it safe to drive my car?I had my water pump replaced. After the guy put everything back together, the guy tells me he lost one bolt. First he says don't drive the car, then he says as long as it doesn't over heat I'm good . I will eventually replace the...
Copyright © 2019 HubPages Inc. and respective owners. Other product and company names shown may be trademarks of their respective owners. HubPages® is a registered Service Mark of HubPages, Inc. HubPages and Hubbers (authors) may earn revenue on this page based on affiliate relationships and advertisements with partners including Amazon, Google, and others.
|HubPages Device ID||This is used to identify particular browsers or devices when the access the service, and is used for security reasons.|
|Login||This is necessary to sign in to the HubPages Service.|
|HubPages Traffic Pixel||This is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.|
|Remarketing Pixels||We may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.|
|Conversion Tracking Pixels||We may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.|