Chuck & WCollins
Your concerns abour shut-downs in very cold weather, are something that I think we should be conerned about, in terms of wear/strees to the engine & all the other bits such as CSUs.
In discussions with engineers, I understand that there is considerable stress (is the expression "Cold Shock"?) to an engine, when it goes from normal operating temperature, to shut down in OAT of minus 10 degrees. Then about 5 or 10 mins later it is restarted. In these circumstances, I suppose the only way to mitigate the stress, is immediately close the cowl on the shut-down engine, & after restart, leave it at around zero thrust (1100 RPM in a GA7) until its regained a sensible temperature. That is what I have done on shut-downs in winter.
Chuck
Just to clarify one of your comments. I assume that it is not usual during PPL MEP training, to actully land with 1 engine feathered & shut down. I have practiced asymetric landings, but only with one engine at zero thrust, to SIMULATE the emergency.