Hi,
If you had already replaced the oil pressure switch, you would have had the intake manifold off. Was it wet in that area? These are very common to leak and run down the rear of the intake and the back of the engine. Most people identify it as a rear main engine leak.
As far as the oil filter assembly is concerned, the intake needs to be removed again, a coolant sensor, and then there is a coolant pipe that will need to be removed. I attached the directions below for you.
Let me know where you are seeing the oil leak and if the intake was removed for replacement.
Take care,
Joe
See pics below.
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Wednesday, January 8th, 2025 AT 7:52 PM