Just read his freebee on oilchange. It struck me as odd that he disabled the ignition so the engine wouldn't start immediately, preferring to turn the motor with the starter until ( I assume) it builds pressure. I was under the impression that the oil pump was more effective at idle and up rpm and therefore builds pressure faster at idle, therefore less rotations before pressure gets to the mains.

I'm new to the M103 but can the oil filter be primed before install or is the checkvalve not that trustworthy?

Jorg