Maybe slightly off he subject but you may (or may not) be interested to know that even after a cfm 56 has been shut down for a few hours, it is very difficult to turn via the gearbox turning point. We use this procedure during borescope inspections.
The heat soak goes to the top of the engine causing the hp rotor to slightly bow. You would not believe the difference between a hot engine and a cold one.
Also, you may be interested to know that after an engine change we carry out a timed accel check of the engine. This check we carry out last. The difference between an engine that has been sat at idle for 10 minutes and an engine that has been at high power for 10 minutes can be a much as 2 seconds from flight idle to T/O power. 2 seconds is a lot of time during a go around.