Exactly. About the only time it'll run closer to the 195 degrees the thermostat opens at is in super-cold conditions.1BLKJP said:210 is the standard temp the 4.0 will run at. You dont' have to start worrying about it til it gets about 235 to 245 range. By then you will probably hearing coolant bubbling.
You may personally not like it but that's how they're designed to run now. They actually run most efficiently at 190-210 degrees, and those temps don't faze the engines or the modern engine oils inside them.gremlinsteve said:personaly, i dont like em running that hot.
180 is fine with me all day long. the heat is for emissions, nothing more.
Since a 195 degree thermostat is already wide open at 195 degrees, let alone 200 degrees, how could it make a difference? My TJ runs right at just below to just over 200 with its 195 degree thermostat.baboonhands87 said:260 is way to much i know from personal exp. when i blew my rad. i put a 180 therm in place of the 195 one and now my it runs around 200 which pleases me.