2015 jeep pentastar 3.6 oil issue

[OVERKILL]

Monitored the pump solenoid. When temp is reached, solenoid locks in and remains in alternate pressure mode.

Yeah, so that definitely doesn't explain your momentary complete loss of oil pressure. Normally that would be it sucking air or the pick-up briefly getting blocked.

 

[Rinspeed]

Not to state the obvious but if the oil pressure was checked with a mechanical gauge the sending unit may be going out. Start with the easiest and simple things first.

I would "start" by finding a new mechanic.

 

[TeamZero]

No codes? Usually they will code if pressure drops. OEM cooler?See many issues with aftermarket. Inspect oil filter cap, have seen the center part of relief fall out and cause issues. Also see the oil galley plugs in front of head , below cam gears get loose/fall out on a few

 

[Jdsaye]

No codes? Usually they will code if pressure drops. OEM cooler?See many issues with aftermarket. Inspect oil filter cap, have seen the center part of relief fall out and cause issues. Also see the oil galley plugs in front of head , below cam gears get loose/fall out on a few

P0522. Will check plugs

 

[Hot Foot Hank]

P0522. Will check plugs

Little side track here. Oil pressure indication issues started day after changing the oil cooler and putting in the Mishimoto 180 t stat.
Ran it for 300 miles highway.
Yea the 180 t stat maintains 185 and oil temp of 172-176. Ambient air was low this week so unfortunately no tests in the heat or running it hard out to Montana like it’s usual daily trip.
I digress. The whole day oil pressure was through the roof like couldn’t keep it below 50-70 unless down near idle rpm.
So pulled the 180 put brand new 203 back in. Fresh oil like less than 1,000.
Changed it anyways. So fresh 0-20 is in it now and it’s getting super low idle pressure in the mid teens and keeps falling. Even at 1000-1400 only reading 27 psi. Used to have great psi. Hot Idle at 22-24 and consistent 37 at highway cruze, climbed to 42 until it hit that 3500 rpm mark then bam 60+.
189,000 miles now.
Could my mistake of 0-20 be THAT bad? It’s got like 30 miles on this 0-20.?
Hate to waste it.
Second question does the solenoid regulate beyond just high low or is there some modulation going on while in the “low” range?
It still kicks to high when I hit 3500.
Bad sensor?
Should I run this old girl tomorrow. Works every day of its life that I’ve had it.
Any late night keyboard warriors out there this evening?
Waiting for it to cool off to change that sensor.

 

[Hot Foot Hank]

Little side track here. Oil pressure indication issues started day after changing the oil cooler and putting in the Mishimoto 180 t stat.
Ran it for 300 miles highway.
Yea the 180 t stat maintains 185 and oil temp of 172-176. Ambient air was low this week so unfortunately no tests in the heat or running it hard out to Montana like it’s usual daily trip.
I digress. The whole day oil pressure was through the roof like couldn’t keep it below 50-70 unless down near idle rpm.
So pulled the 180 put brand new 203 back in. Fresh oil like less than 1,000.
Changed it anyways. So fresh 0-20 is in it now and it’s getting super low idle pressure in the mid teens and keeps falling. Even at 1000-1400 only reading 27 psi. Used to have great psi. Hot Idle at 22-24 and consistent 37 at highway cruze, climbed to 42 until it hit that 3500 rpm mark then bam 60+.
189,000 miles now.
Could my mistake of 0-20 be THAT bad? It’s got like 30 miles on this 0-20.?
Hate to waste it.
Second question does the solenoid regulate beyond just high low or is there some modulation going on while in the “low” range?
It still kicks to high when I hit 3500.
Bad sensor?
Should I run this old girl tomorrow. Works every day of its life that I’ve had it.
Any late night keyboard warriors out there this evening?
Waiting for it to cool off to change that sensor.

Oooh and it’s felt super sluggish with that 180 t stat. Typically it can pull any grade in 5th with the cruse on setting around 2500 rpm. But it was struggling dropping down to 4th to maintain 65. So the 180 one is NOT the answer. Read lots of mixed comments before trying it myself and I think I made a terrible terrible mistake boys.
Another question can that many miles at super high oil pressure screw things up THAT badly? I sure hope it’s the sensor.

 

[Hot Foot Hank]

Oooh and it’s felt super sluggish with that 180 t stat. Typically it can pull any grade in 5th with the cruse on setting around 2500 rpm. But it was struggling dropping down to 4th to maintain 65. So the 180 one is NOT the answer. Read lots of mixed comments before trying it myself and I think I made a terrible terrible mistake boys.
Another question can that many miles at super high oil pressure screw things up THAT badly? I sure hope it’s the sensor.

Sensor didn’t fix it. 11psi at hot idle 24@1200 27@1500. 32-34 at 2500 60+ over 3500.
Used to be 22@hot 34@1200 42@2500 60+@3600
Bought is with 174k
Ran Valvoline 5-20 for 5,500
Ran mobile xp with xp wix for 7800 changed filters at 50 hours
Switched to mobile super syn 5-20 and wix 10010 for 3,000 cuz it was lookin dirty
Refilled with super syn
Ran it for 1,000 changed cooler and t stat and ran for 3-400 miles at 175* oil temp maxing psi basically all day, super sluggish.
Went back to the 203 t stat
So now it’s got 0-20 mobile xp and wix10010
With 50 miles on the oil. Oil temp=190 coolant >200 <210
So it got a new Dorman aluminum oil cooler wix10100
Dorman aluminum coolant crossover
Dorman aluminum t stat housing.
6 ngk coil packs 6 ngk lazer iridium plugs

Gonna try 5-30 when I get home tomorrow and see if that helps it or hurts it. Till I can get a mechanical gauge on it.
Or maybe I’m worry too much. It’s how I make a living only wheels I got.

Thanks for all the tips about locations it can suck air from or leak pressure.
Forum bosses you wana start a new thread on this subject or just have me keep posing here?

 

[Hot Foot Hank]

Okay figured out my shop helper thought it would be a good idea to put an entire bottle of Seafoam in the crank case before the oil change then run it up to operating temp before changing the oil. “To help clean it out cuz it’s an old motor”
I did the thermostat and oil cooler thee next day.

So changed the oil fromm0-20 to 5-20 then changed to 5-30 mobile high mileage all within 2,000 miles. Got good pressures again.
19-20 hot idle,
33 at 1200,
34-38 at 2,300.
60+ over 3500
83 at 5,500
Warm and fuzzy
Motors got 6750 hours