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.
The engine cooling fans are not functioning, low on coolant, bad thermostat,
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
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 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 thermostat is it opening at all check timing