The first picture seems pretty certainly posed. If the engine was being rigged for test, or derigged post test, some tooling would be evident, (air tools suspended from a balancer, or electric screwdrivers /' wrenches). Possibly that shot only showed a unit being moved from place to place.
With no rotating equipment near by the long hair is probably acceptable. The rest of the PPE placxes the shot in a modern factory environment.
My conclusion is that there are a series of publicity shots purporting to show how things are made, (without the real in depth knowledge of what IS happening).
An engine in a cold chamber at -15 C does not look cold, (the low temperature removed any moisture a long time ago) So you throw buckets of soapy water over it, so that the ice and icicles LOOK cold. The folk around it, wearing thick gloves, hats, clothing are far more believable.
Howard