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  1. Tux

    2004 Rubicon 4.0L Running Cool

    Failed to mention that I replaced the sending unit with a brand new one. Again, real time OBDII info indicates 203° while gauge only indicates 170°.
  2. Tux

    2004 Rubicon 4.0L Running Cool

    Solved part of my problem. Found out my Torque Pro app can provide realtime data while driving so plugged in the OBDII blue-tooth scan tool and connected to my smart phone and went for a drive. The temp gauge is indicating about 170° but the scan tool is registering 203° once the engine is...
  3. Tux

    2004 Rubicon 4.0L Running Cool

    As opposed to everything I have been able to find here and on Google, my TJ is running too cool, not overheating. 2004 Rubicon TJ, 4.0L, manual trans, purchased new in '04. Hit 65K miles and decided to do some preventive maintenance. Drained coolant, replaced all hoses, pump and thermostat...