Using a Mercedes 190D-2.2 as an example; Normal operating temperature is around 200 degrees Fahrenheit. Keep in mind that the clutch operated radiator cooling fan is designed to shut off when the coolant temperature reaches 212 degrees Fahrenheit or 100 degrees Celsius and below.
SPKB..
An engine might sound like a diesel at operating temperature if the engine was a diesel or if there was an issue with the manifold. Sometimes gases escaping the manifold cover could cause the engine to sound different.
the engine will take longer to get to normal operating temp. and the water temp could fluctuate while driving
The normal operating temperature for diesel marine engines typically ranges between 160°F to 220°F (71°C to 104°C). Maintaining this temperature range is crucial for optimal engine performance and longevity. Operating outside this range can lead to increased wear, reduced efficiency, and potential engine damage. Regular monitoring and proper cooling systems are essential to ensure the engine remains within this temperature range.
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.
I am an ASE certified technician. Your normal engine or coolant temp should be 190 - 210.
what is normal operating temp.
To control the flow of coolant in the engine, so the temp will reach normal operating range
the normal operating temp is 180 to 200 that's with pre 1993 318s and magnum 318s
The first thing you will notice is that it will take longer for the engine to warm up to normal operating temps, then you will see more of a swing in operating temperatures for different operations and ambient air temparatures. If it is very cold outside you may see the engine overcool when not working hard. Thus will be more of a nuisance than anything unless it's a diesel, then you may actually overcool the engine and cause excessive wear and tear on the engine and may cause fuel oil dilution ( diesel in your oil). Diesel's need a water temp above 140 degrees f when operating due to the high flashpoint (140f) of diesel compared to gasoline.
About 200 degrees is normal
The normal operating temperature for a 2001 Cummins 5.9 diesel engine typically ranges between 190°F to 210°F (88°C to 99°C). Maintaining this temperature range is crucial for optimal engine performance and longevity. If the engine consistently runs outside this range, it may indicate cooling system issues or other mechanical problems. Regular monitoring of the coolant temperature gauge is advisable to ensure proper operation.
the sending unit is located in the engine block, sends a signal to the temp guage, mind you the engine temp guage is not accuate, but at the 1/2 way mark is "normal" for the engine operating temperature