https://www.youtube.com/watch?v=ehC4I-pUas4 is
Post# of 3601
The above video prompted Vegas to ask what were the other motors during the video panning sequence? from 3:50 to 4:33 (actual shot was 4:06 to 4:20).
Seems to me that the shot shows 5 yellow engines. A few years back there were 7 engines on that side of the room. I feel that one was to become the turquoise color engine of which sequential photos were made to show the conversion process.
That left six engines, to my thinking. The six are now five engines remaining on that side, because there is an orange engine for Secure Supplies, which I feel came from the other side. Seems that none of the 5 yellow engines that remain have any heads on them or at least I can not see any heads. Maybe the heads are removed for sale?
The video is long but provides some unique details. 1. It is run long enough that if there was a glaring problem there would be strange noises. 2. There is no valve clatter, most of the noise is intake air, fan air and belt noise for the water pump/auxiliary. Actually the engine would get a really good mark from OSHA on noise reduction alone. 3. Vibration from the previous valve train having been removed seems to ameliorate, to a large degree, not only clatter but also internal impact forces from valve closure on the head's integrity (no need to set valve gaps or plane the head later in life).
If the ceramic valve seals work as well here as they do in the USA nuclear submarines, I would think that Cummins, Ford, MTU, Cat, Rolls and others would be a bit nervous about now. Buy more and stay long.