Oil pressure too high?

1974DartSwinger said

I'm going to order a new pressure sending switch just for the heck of it . . . theoretically if the switch is fine and the gauge is fine, what else could cause oil pressure to spike so high like this?


Could something I havent thought of cause it (something other than sludge or junk getting caught in a passage)

For the record, I'm pretty darn sure my gauge and switch are actually working fine. Maybe it would be a good idea to get an aftermarket oil pressure gauge to stash under the dash for a more accurate reading.

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Your kidding, you trust factory electric gauges?? I have yet to see any be accurate unless they are sent off to a reputable gauge re-manufacturer and calibrated. The only thing that can cause excessively high oil pressure is the relief valve in the oil pump stuck. In nearly 30 yrs. of working on engines I have only seen one stick and that was in a Jeep. It's possible, but not very likely. The chance of a sending unit going bad is pretty high. I've replaced more of them that I can even remember. Sometimes your lucky to get a year or 2 out of them.