Wild Card wrote:
never prefill you fill it up with unfiltered oil on the outgoing side of the filter, same with fuel filter. It was an old way of doing service.
I spin my filter off and let it rest carefully on the crossmenber. I stick my finger down in the threaded hole and pull the filter out through the wheel well...I have yet to make a mess with the filter.
There is NOTHING wrong with pre filling as long as you don't dump anything into the filter. You would have to be blind and very careless to let that happen. Cummins recommends doing it. I have pre filtered EVERY filter that I could with WELL over one million miles driven and serviced with no issues.