Sudden raise in oil pressure a sign of eminent failure?

[fastfredracing]

I have only blown up two motors in my life, One was catastrophic at 5700 rpm, and threw parts out the side of the block, 355 chevy, and the other , I just ran until the motor locked up. That one did not have an oil pressure guage, so I did not know what was going on, but just before I grenaded the 355 I remember for a few days before that the oil pressure rose a few psi.
My 257,000 mile beater Grand Cherokee's 318 has suddenly picked up about 15-20 psi extra oil pressure. It still purs like a switch watch, and I notice no oil consumption, or funny noises, but last week , I was goofing around with the kid in the car, and revved the pee out of the poor thing. I am wondering if I will finally kill this thing off. I am going to drive it until it no longer moves under it's own power.

[EarlyPorsche]

On jeeps a bad oil pressure sender can register too high or low.

[Zeke]

I had a bad sender on my Chevy truck. I'm told they will fail to the point that all the oil shoots out of the block.

[Joe Bob]

Check the gauge....replace sender, maybe look at a clogged filter?

Does the sender allow for removal and a pressure gauge to be hooked up direct to the block? I used an extra braided brake line and a small gauge for my Harley....it might be a cheap test.

[URY914]

[techweenie]

"Revving the pee" out of an engine with no load is a no-no.

There's a famous video that appears to have been removed from the web of a new salesman at a dealer display in Canada revving a new Ferrari to redline in the display stand. The engine suddenly just stops and oil surges out from under the car. Ugly.

[ShakinJoe]

Tap the gauge a few times like they do in the movies.

[john70t]

What they said, but you don't even need oil if you're using Slick50.

[nota]

i vote a bit of grim got dislodged
by you reving it
simple oil change may get it out
or a flush with diesel cranking NOT RUNNING
AND DRAIN MAY HELP

really depends on how nasty the sludge is
some are better left alone

[EarlyPorsche]

Nah. An oil change isn't going to do anything. You need a sender. Revving it may have just spiked pressure in the sender and damaged the old brittle fiber disk.