Since the hot summer days this year my 92' 2.5 turbo 124 has been running between 90c and 105c. The coolant is due for a change so I will do that and test the t-stat too. A few questions:

Is there a block coolant drain on a 92' 2.5 turbo...where?
Any advice on making sure all air is out of the system?
What is the best flush/fluid to use?

Thanks for any input.