2 temperature readings I am interested in on a 2020 wet M8Engine: Engine Temperature (ET) and Cylinder Head Temperature. (CHT) You would think CHT would be much higher than ET at any one time. Especially at higher speeds (70-90 mph)
I am getting massive conflicting information of normal ET and normal CHT. Can anyone set me straight with the facts and not hearsay?
ET or CHT Read this: About m8 engines Dealers will tell you normal operating temperatures are 270-325 Degrees.
Correct my information that is incorrect!
ET or CHT?
M8 ideal temperature is 260 degrees
ET or CHT?
At 280 degrees the engine on twin cool engine, is starting to gets hot. 290 degrees the engine is too hot and starts to accelerate engine wear.
Aluminum Alloy castings rapidly start losing strength at 350 degrees. Cylinders will go out of round, the heads will warp, valve seats will begin to warp.
ET or CHT?
Optimum temperature for a cylinder wall is 190-195 degrees. So if your M8 engine is operating at normal temperature 260-275 degrees) you know the cylinder walls will be at around 190-195 Degrees)
ET Or CHT?
The engine temp that can be displayed on the Power Vision screen is read directly from whichever temperature sensor the ECM looks at. It is NOT an exhaust temp. Depending on where you’re located, those temps are not all that uncommon for a big twin in the summer. Out here in the deserts of Las Vegas, when our ambient temperature is 110+, it is not uncommon for me to see temps as high as 350 or so in stop and go traffic. I checked with one of our HD experts, who told me to only be concerned if the temp gets to 380… At which time, they recommended to pull over, shut the bike off and let it cool down.