Talking with a buddy today, the subject was his work & a large diesel motor. His co-worker needed a quick how to on installing the fuel filter.
'couldn't be easier, fill the filter, lube the gasket and screw it on'
..immediately thought of this thread & asked if he pre fills his oil filters too.
He said Yes
I said there could be excess back pressure ect.. he said 'well, is it before or after the pump...'
There was no way I'm about to dent a friendship over prefilling a filter or not, so I left it alone.