Oil Filter Plate

AJ/FormS said
FWI
in the block, the large oiling passage from the pump has a cup-plug installed to divert the oil to the filter. And the oil then returns to the gallery above the plug. The passage has a step milled into it to stop the plug from going in too deep.
But there is no way to tell if it is in deep enough, except the experience of the installer to feel it stop, as he is driving in the cup. So far no problem; if not installed deep enough it becomes a restrictor to the entire oiling system, but the filter won't blow off and you won't see it on the pressure gauge.
But if the installer manages to drive it in too deep, then the pressure will back up and blow the filter off, and you still won't see it on the gauge, except perhaps if you knew what to look for.
There may be a depth spec for this cup-plug, but I don't recall ever seeing one.

Hey AJ, you would have to drive that plug several inches too deep the get it up into the upper flow passage that carries the flow out of the filter! So not very likely!

There may not be a depth spec, but it has been measured and reported here before (by myself and others).

And BTW, the HV pump only flows 18-20% more than the stock one, so is not any big deal at all. You may have had a combination of the extra flow AND the higher pressure relief spring, or more likely your relief piston was/s inverted or sticking and was not ever relieving the pressure. It takes well past 100 psi to blow even the cheapest filters gaskets... ask me how I know!