Just pull out the 6mm bolts holding the pump to the bottom of the crankcase and it drops right out.https://images.cmsnl.com/img/partsl...l-pump-oil-separator_big3IMG01174981_cdd8.gif Remember, you need two gaskets to put it back together.
Thanks gentleman, Mr Bill Silver recommended I look at it after 7k miles since engine rebuilt. But oil has been changed regularly.