If a thermostat is working, it should open at a specific temperature, which varies depending on the thermostat. Common temps are 195, 180 and 160. To check the thermostat, removed it from the engine, and place it in a pan of water with a thermometer. Heat the water to boiling and watch the thermostat. It should open before the water boils. Check the temperature at which it opens completely and see if that is satisfactory.
Anotehr WA is to start the eingine and let it idle. Obviously, if the engine overheats there is a problem. It could be a thermostat that is stuck closed or something else. If the engine does not warm up, or does not maintain a good operating temperature, then the thermostat is stuck open. If after ten minutes or so, the upper radiator hose is hot to the touch, then the thermostat is probably working properly.
Personally, I just change mine if there is any question if it is good or not. They are cheap. I often replace mine when I flush the cooling system, just like I change my cap and rotor every year.
It could cause the check engine light to come on with a code concerning cooling system/thermostat performance.It could cause the check engine light to come on with a code concerning cooling system/thermostat performance.
Engine thermostat malfunction
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.
check thermostat. check engine fan coolant sensor possible locations radiator or thermostat housing. check electric fan working
To fit a thermostat on a Renault Laguna, check both upper and lower hose of the car. Check the hose that is cool and fit the thermostat on the engine side of that hose.
follow the top radiator hose to the engine. that is where your thermostat is. you will have to drain the radiator, remove the engine side of the hose and remove the thermostat housing to access it. remove thermostat clean mating surface of housing and engine, install thermostat, install housing, secure radiator hose, fill with coolant. start engine and check for leaks.
it depends on the engine but check where the lower hose ends closest to the engine
The engine cooling fans are not functioning, low on coolant, bad thermostat,
This depends on the vehicle. If the thermostat is stuck open the engine won't get to the proper operating temperature which could trigger the MIL (check engine light).
This is too cool if the engine had been running for awhile. Thermostat is stuck open which causes the system to stay in closed loop, thus setting the check engine light. Drain and flush the radiator, and replace the thermostat. You may have the have the Check Engine Light reset with an OBD2 scan tool. Ask an auto parts store to reset it after selling you the thermostat and antifreeze for the repair.
check thermostat is it opening at all check timing
Engine thermostat malfunction, temp below normal range. Basically the engine is not warming up fast enough.
Many vehicles will trigger a check engine code if the engine never reaches its designated operating temperature (Such as if a thermostat was stuck open). However, there are hundreds of other reasons a check engine light can come on. Putting in a thermostat solely because the check engine light came on is a very bad idea. Any time that light comes on you should have the vehicle scanned by a trained proffessional (The guy at Napa doesn't count). A good service technician can use the information given by the engine computer to determine what is wrong with the vehicle.
Check the engine thermostat. Its probably stuck open.
It is normal operation. With "key on engine off" the check engine light should be illuminated so you can observe that it is properly functioning.
Check for functioning water pump - no water circulating inside the engine can cause an overheat condition. Check the water thermostat - a closed valve (defective) will not allow hot water to circulate out of the engine into the radiator which cools it before returning it to the engine block. Do a compression test. It may have "tuliped" some valves from overheating.
Check the radiator for full coolant. Check the engines water pump and thermostat, as the engine coolant carries heat from the engine into the heater core.
thermostat, water pump, temperature gauge, or coolant? listen for the sound of boiling coolant (rule out temperature gauge, or coolant if present). Stop immediately, if present, and allow the engine to cool. Generally, the temperature goes higher when it is the thermostat that malfunctions as opposed to the water pump. Many water pumps are belt driven, when the belt goes, the water pump stops, and the engine will overheat, although not as high as when the thermostat won't open because you have a larger cooling resevoir. You can also check the hoses for the feel of flowing water into the radiator (functioning water pump if the thermostat is open), and a temperature differential on the input/output hoses to the engine (indicating water flow through the engine).
If the car is running hot, check the thermostat. You can test it by simply removing it and holding a cigarette lighter to the center. If it opens, then it is functioning properly. Check your anti-freeze levels. Check for leaks in your radiator, and check that your fan is turning on.
The thermostat would be the first thing I would check.
The 2003 Subaru thermostat is located inside of the thermostat housing, on the front of the engine. The thermostat will be near the bottom of the engine.
The check engine light is illuminated for a reason. One of the engine control devices has probably ceased functioning. Take the vehicle to a shop for diagnosis, and repair of the problem.
Check your thermostat, it is either stuck open or not in the engine.
Check the engine end of the upper radiator hose
i am guessing, you mean circulating thru engine and radiator.if this is the problem, check the thermostat then check water pump.