Mystery leak

Let me preface with I recently rebuilt the rear brakes and front driveshaft so the Jeep sat for about three weeks. Prior to this with daily driving, I never noticed any major leakage when parked etc. I did change the oil after the above work.

I started by inspecting the bottom engine, differential and transfer case. Quite a bit of grime and fresh oil drops. I checked the filter, it was firm, but I tightened a bit more anyway. It did not leak within the ten minutes of my inspection. It does seem to be coming from the front of the engine area.

I went to the store for Purple Power and Gunk Degreaser, same 10 mins, there's some drops in the parking lot. So I thoroughly cleaned the engine area and transmission, differential etc. I've added some UV dye, now it's a waiting game to try and isolate leak location.

Mind you this is fresh oil, I checked level and it's full. This was from overnight.

I drove to work, stayed 3 hours, no drops. I get home, park in the carport, 45mins later a few drops. When the sun goes down, the UV glasses and light come out.

Ok seems to be coming from the filter area. I"ll try a new filter after an inspection of the area and threads. But it did not crossthread, it spun on with ease as usual. Maybe there's a hole or defect with the filter.

Check the oil pressure sender, it's located right above the filter. It's pretty common for them to leak on the KJ.

look at the connector on the oil pressure sender.
Mine had oil all over it before I replaced it.

Royy said:

Check the oil pressure sender, it's located right above the filter. It's pretty common for them to leak on the KJ.

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A little RTV around the base and oil resistant thread sealer correct the issue?

i believe mine was leaking through the connector via the sensor so RTV and thread sealer would not have worked in my case.

That's a lot of oil leak. Mine wasn't that bad. I noticed it as there was oil around the connector and forming droplets.

oblivionnewtonjohn said:

A little RTV around the base and oil resistant thread sealer correct the issue?

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Replace with MOPAR unit

Which tool/socket to remove? None of mine are deep enough to clear plastic housing.