Don"t get me wrong, I do watch SOME you tube. Like some of them too. A recommended one is good.
DPittman, 2.7 maybe related to the 3.6. Take off 1/2 the intake manifold to change 3 spark plugs, the oil pressure sender is under the lower 1/2 of the intake manifold, and it screwed into the oil cooler, prone to leaking, attached to a plastic base, attached in the valley, o-rings that may/can/do leak. Oh, the base may fail also. Oil filter goes into it, DO NOT over tighten cap.
Roller rockers, some of which have bad bearings, destroy rocker, takes out the cam, etc. The oil pump has an electric soliniod on it to give 2? different pressures, cam shaft advance/retard. Failure prone it seems.
Some years bad heads, here's a "good" one, each head has 2 oil gallery's running end to end. A threaded plug just under the cam spocket, seems there were more than 1 Monday and Friday in each week. Not tightened and or no sealant on plugs, all 4 of mine were loose.
The start of it, was a low oil pressure code. Oh, the worm holes. There's maybe a few million of these in vans, cars, and pickups. I hear some terrible clattering from some and think it's to late for them.
Yes, mine is running fine again, did not find any majors wrong with it. Would cross my fingers, but have to wear mitts then.
Think about making an EDM some times, there was an article in Home Shop Machinist or its sister mag some years ago. But don't need it till you need it.