Just trying to get my facts straight here but when the diesel emission test first came out, the engine oil temp had to be a minimum of 60 deg (less drag, see) and the engine had to be revved to maximum from idle and held there for a second....3 times
If the particulates were still there then there was another 6 attempts, I think.
Some time after, the powers that be realised that a lot of the crap was actually coming from the exhaust system anyway......
I remember cringing when my vehicles were done, although I've never witnessed an engine burst due to that.
When the high revving turbo's were tested I do remember seeing a turbo glowing and believe me, thats nigh on impossible with a diesel!
The timing belt was the first thing to go, as the valves started to bounce and a disclaimer was visible
Running the vehicle on a rolling road would mean having to tie the thing down, so that wasn't practical.
Happily today, oil temp isn't necessary and one quick burst of throttle is all thats needed.
John