Inner sactum oil galley plug

I was talking about a threaded plug. Did not even know about this other one toolmanmike is explaining.


The plug Mike is referring to is a pressin and that separates the two lines going to the oil filter. Without it you have real crummy oil pressure the other thing is before you replace it. You should take a long half inch drill bit and drill that passage to half inch because it is the main one that feeds your lifter galley and it is usually a bottleneck from the factory.