N14 starting oil pressure too high

I have a JD 8970 with the N14 engine and a couple of times in past 10 years at startup the oil filter separates from the metal top blowing out the oil. I took the oil pump check valve apart and no real scuff marks or grooves so only thing left is a bypass valve in the engine oil cooler unless someone else has went through this problem.

Well it would have to be in the bypass sticking closed or Blocked since the pump is DUMB and does not know how to stop pumping . Now i am no expert on the N 14 as i have never worked on one of them but worked on the older 855's . I have only had two engines that would blow and oil filter apart and both were F E fords , one was my first build when we did something off the wall and needed higher oil pressure and the other was a new 69 Ford Shelby G T 500 just off the truck when i was working at a Ford dealership . I was working on the two drag cars on a Saturday morning getting them read for and all Ford Meet and the only one in the service dept as we were closed on Saturdays , The owner came out and asked if i could do a quick detail on this New Shelby as his daughter wanted to drive it . It was already in the service dept and setting in a lift bay So no big deal i'll do a quick fluid check check the tire pressure check and make sure the wheels don't fall off of it and do a fast engine set as to Ing. timing and carb set . I had done all the engine off checks when little miss WITCH came out and told me she wanted it to RUN and to set it up TO RUN Ok fine this will take a little longer and i get well HURRY UP . So out comes the scope and get it all hooked up and i start the engine and all of a sudden she is screaming about all the oil running on the floor and i shut the car off and raise the car back up to se a FL1 A filter split open like a banana . So i put a new filter on and dumped in 6 qt.s and tried again only to have it blow . the bypass on the pump was stuck closed . and on a Mustang with a 428 you were not just dropping the pan for a quick fix . Little Miss Witch did not get her GT 500 convertible to drive for the weekend and had to settle for a Teebird. Somehwere i saw a post on this but i do not know where i saw it at. I am lucky on the fact if i have a Cummins problem i can call and old friend and ask him as he was Service manager at the Cummins dealer not far from me and now has his own shop . Look on the net as i am sure i saw something on this .

(quoted from post at 07:56:03 04/04/21) I have a JD 8970 with the N14 engine and a couple of times in past 10 years at startup the oil filter separates from the metal top blowing out the oil. I took the oil pump check valve apart and no real scuff marks or grooves so only thing left is a bypass valve in the engine oil cooler unless someone else has went through this problem.

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Dave, here's a video of a guy that had low oil pressure in an N14 engine in a dump truck...he goes over how the system works in this video...there's an earlier video of him tracking down the cause too...maybe this will help out.

https://www.youtube.com/watch?v=c1XhUoD9LB4

I remember him saying that the relief was set at 250 psi which made no sense to him...

Is the oil pressure normal after it warms up? I believe there is an oil thermostat in the oil cooler(I think!?)near the front of the housing-above the filter. Maybe it is sticking. Seems like a fellow tech told about an oil pressure problem due to that one time. Mark.

It only has the dash mounted idiot lite may need to connect a true manual read gauge

N14 is a low pressure oiling system. the control valve is sticking or set to high.

Oil pressure at idle is only 10 psi and at 1200 rpm is only supposed to be 25 psi.