ld28 oil relief valve?

[89lux]

anyone know where to locate this is it on the filter housing? i have a ld28 that twice now has blown the oil filter gasket on start up due to high oil pressure. apparently this is the prob

[Crash bandicoot]

nissan call it a valve set regulator or valve oil regulator and is basically a spring cap and ball bearing that is design to be over come at a set oil pressure.

you will find it here #8 in the diagram
http://nissan4u.com/parts/patrol_r/el_160/1988_1/type_3/engine_mechanical/lubricating_system/illustration_1/

[89lux]

i cant seem to find that part on mine. when i unscrew my filter and look up i can see a ball bearing iv pushed this up and down and it moves freely

[Crash bandicoot]

Then you might have a blockage above that.