Did I kill some part of my oil system?

[Girl und Panzer]

Went through some deep (hood height) water with suspended red clay mud over the weekend. ended up with my radiator and oil cooler covered in mud. Since then, I've had this weird thing where when the oil and engine are at environment temps, the pressure gauge reads normal (shoots up to the second mark, then sinks down gradually. After everything warms up the readings are weirdly low. At idle, it's below the first mark, almost at the 0 reading, and on the highway it's around or a bit above the first mark. Nothing else abnormal but it sounds a bit odd any time i start up. What's going on?

 

[LandCruisinMy93]

Went through some deep (hood height) water with suspended red clay mud over the weekend. ended up with my radiator and oil cooler covered in mud. Since then, I've had this weird thing where when the oil and engine are at environment temps, the pressure gauge reads normal (shoots up to the second mark, then sinks down gradually. After everything warms up the readings are weirdly low. At idle, it's below the first mark, almost at the 0 reading, and on the highway it's around or a bit above the first mark. Nothing else abnormal but it sounds a bit odd any time i start up. What's going on?

You may need to unplug your sensors and clean them out thoroughly, add some dielectric grease afterwards

 

[Tedward]

My wagon started doing the same allmost 6 months ago. Only real low oil pressure on the gauge after it's good and warmed up. Don't have any answer but will try the sensors plug clean when home.

 

[LINUS]

You may need to unplug your sensors and clean them out thoroughly, add some dielectric grease afterwards

Bingo - exactly my 'go-to' thought.

Over time I now have all the connectors underhood / underside gooped in white lithium grease, helps when up here in WA you eventually get Winter water intrusion most places by the time the weather turns for Spring.

Some quality time with a brass toothbrush, compressed air, a metal pick/sharpened TIG rod, and a tube of some light grease will do you some good.