I flew the K-4 a bit and found the constant engine failures to be tiresome.
109 you need to remember to set the governor to auto in your start up. (same for DCS and il2 clod) it's a little black switch on the left under the throttle by magnetos. it is the only thing to remember engine wise.
rads set to open and you can throw it around easymode especially with WEP. you will 'vent' white coolant when you breach operating temperatures. Usually will only ever happen hanging on your prop at zero airspeed. I agree there should be some after mission clues as to why the engine failed otherwise your always second guessing what happened. Same reason I don't like flying the P47. Only stick time and hours can you know your ride properly.