Dont do it mate ,the design is perfect the way it is..Just about every large truck and tractor in the world today uses a bypass filter,,, CAT,,, DETROIT,,, CUMMINS... it might be old design but it works beautifully as designed. Its much better for your engine just to keep clean oil in it .. at least once a year no matter what the miles.
The truck I am driving has a detroit constellation engine with 1010700 klms on it and the heads never been off. it has 2 bypass filters installed.
Whats your oil pressure @ idle and say 60 klms?
GPW Feb, 45,
engine MB131277 Overstamped XXX4B1945