Best way to tell your normal operating temperature is to visit an auto parts store and ask them what the OEM thermostat temperature is (or you can look it up yourself on Autozone.com). Most cars these days will have around a 190 degree thermostat. Your car will run slightly hotter than that temperature as it is needed to maintain the thermostat in an open position. With that thermostat you can expect to see the temperature of the water stay around 205-210. If the water temperature ever starts to get above 240 you should shut the engine down to avoid damage and have the cooling system checked. Temperatures above 260 WILL cause significant engine damage.
You run it until the engine reaches normal operating temperature on the temperature gauge this way the oils viscosity will be correct. on colder days you need to run it longer.
Sounds like it could be a bad thermostat - not closing to allow engine to heat to normal operating temperature
The normal operating temp for any Mercedes is between 80°C and 100°C (the next line after 80°) Anything over 100° and you should have it checked out. Mercedes are different, in that, the temp gauge is constantly moving because it provides true engine temp data... not just (normal) or stuck in the middle of the gauge.
lets you know from inside the car if your engine is running at the proper operating temperature.
We replaced the temperature gauge in my 1991 Chevy blazer what is the normal operating temp?
Just to the left of the engine temperature gauge , at the center of the normal operating temperature range . It is a symbol of a person wearing a seat belt with a circle in front of them
The gauge on the far right side of the gauge cluster is your engine temperature gauge. The normal operating temperature is at the half-way mark. If the needle raises above the 3/4 mark then the car is overheating. A light will come on also if it begins to overheat.
It sounds like your temperature sender (on top of the engine) is faulty allowing it to earth out, or the wire going to the sender may be touching a earth.
i just put in a new radiator and now temperature gauge reads high but their are no leaks
Between 180 and 210 degrees. It is safe to operate an engine normally above about 112 degrees. Before it gets to that temperature you should be soft on the accelerator. The red zone on the temperature gauge is usually around 240-245 or so. Getting the engine that hot can be harmful to it.
205 is the highest acceptable operating temp. aluminum head will sause eng . to operate slightly cooler at combustion chambers ..not noticeably different at gauge.
The 4.2 L 6-cylinder engine uses a 195* thermostat per the factory specifications. The thermostat begins to open at 195* and is fully opened by about 200*. 200-215* as shown by your dash board temperature gauge is considered normal operating temperature if your cooling system is in good condition and properly maintained.