As you may have seen in another thread, I went on a longish run today (40 miles) and result.....coolant temp lower than normal (never got above 95) and colant level rose in tank, instead of falling./ I am guessing small leak at bleed screw was enough to prevent proper pressurisation of coolant, so higher temp and loss of "volume" under pressure?
still smell, but probably stuff I spilled when i removed old screw