What temperature does the thermostat open at in a Subaru?

Thermostat Opening Temperature in Subaru
In Subaru vehicles, the thermostat opening temperature can vary depending on the specific model and year. However, based on the information gathered from various sources, it appears that the thermostat in Subaru engines is typically set to open at around 170°F. The coolant will begin to circulate through the radiator at this temperature and fully circulate at 180-185°F. It’s important to note that during high speeds, the radiator cooling might bring the coolant temperature below 170°F, especially in very cold air temperatures, causing the thermostat to begin to close and the temperature to rise again.
Additionally, there are aftermarket thermostats available, such as the RCM Low Temperature Thermostat, which are designed to open at lower temperatures to allow the engine coolant to circulate around the engine much earlier, ultimately reducing overall engine temperatures sooner than they would normally occur.
It’s also worth mentioning that the thermostat’s opening temperature is crucial for the proper functioning of the engine and its cooling system. If the thermostat is stuck open, it can lead to issues such as the engine running cooler than intended, which can impact efficiency and performance.
Overall, while the standard thermostat opening temperature for Subaru engines appears to be around 170°F, it’s important to consider variations based on specific models, aftermarket options, and individual vehicle setups.

Is 250 degrees to hot for an engine?

Anything over 220 is considered overheating. Some car systems alert the driver to overheating at 221 degrees; others begin this a little higher. But you may operate an engine as high as 250 degrees, or maybe even higher, as long as the engine coolant doesn’t boil.

Is 220 hot for a car?

For most cars, the normal operating engine temperature is in a range of 195 to 220 degrees Fahrenheit, though most dashboard temperature gauges don’t show an exact temperature. Instead, there are typically markings for cold and hot on the edges of the gauge and a normal range in the middle.

Is 230 degrees to hot for an engine?

Depends on the engine and the reason the temp is that high, but in general, 230 degrees is an acceptable oil or coolant temperature. Many engines run at around 230 degrees during normal operation and most engines will tolerate 230 degrees no problem.

At what temp do fans stop working?

“Fans at any temperature up to 104°F, where there is some kind of humidity, are beneficial,” says Jay. “But as the temperature goes higher, if it’s dry then fans are progressively less useful and potentially detrimental.”

How do I know when my thermostat is open?

If you see the coolant flowing through the radiator, then the thermostat opened and is working properly. If not, then it is most likely stuck closed. If you can’t tell if the coolant in the radiator is flowing, shine a flashlight inside so you can see it better.

What temperature is a thermostat fully open?

between 180 and 195 degrees
Most car thermostats are rated to begin opening between 180 and 195 degrees and will reach the fully open position around 20 degrees higher, allowing coolant to flow between the radiator and engine.

Is 240 too hot for a car engine?

Most experts agree that your engine should run between 195 degrees and 220 degrees. In ideal situations, your needle will maintain a posture right in the middle of your gauge. Keep in mind that this can go up or down depending on the conditions in the vehicle itself (such as running the air conditioner or heater).

What temperature do Subaru fans turn on?

You’re right. A quick google on other Subaru forums yielded: low speed fan on @ 99C / 210F. high speed fan on @ 105C / 221 F.

What is normal thermostat temp range?

between 68° and 76°
What Is a Typical Thermostat Setting? A typical thermostat setting is between 68° and 76°.

How do I know if my Subaru is overheating?

Telltale Signs Your Subaru Engine Is Overheating

1. The needle on your temperature gauge creeping into the red zone.
2. White smoke coming out from under the hood and/or the tailpipe.
3. A burnt, sweet smell coming from the engine.
4. Sluggish acceleration.