I drove the car in city traffic today and think I got it to operating temp. Afterwards, the splitting gasket does not seem to leak, but it might be too early to tell. The sensor does not leak anymore.
I brought my torque wrench to Sears today to have it recalibrated. I used the torque wrench to open a differential filler cap at about 125 ftlbs some weeks ago and that might have "disturbed" it.
I'll let you know how much it is once I get it back.