Oil pressure 40cold/20-25hot, safe to drive?

[B-train]

Gotcha, thanks! It’s about 20-25 when idling or cruising at 1000rpm when fully hot, going all the way to 40-50 when i hit the gas

I just watched mine today and it sits at about 25 psi (per the who knows if it's calibrated guage) when cruising down the road around 1300 rpm. Drops to about 20-ish when sitting at a light. Always has 50 when cold for comparison

 

[iamdub]

I guess I'm just confused/not 100%...

My DoD was turned off via my BlackBear tune, and for as long as I've owned my Yukon it's had slightly lower than average pressure than normal (if that's a thing) .


30-35 psi at idle when engine up to temp, and 35-40ish cruising around. I don't really beat on it so I'm not looking at whatever it's max would be in 3rd gear at 6200 Rippems*.

I read here a little while ago that a high volume pump will give slightly lower oil pressure numbers across the board, and took it at face value.


*Rippems = RPMs

There are far too many variables to say what is "normal". First off, are these pressures as estimated by looking at the gauge in the instrument panel? That, alone, is worth about a 10 psi +/- tolerance, at least. If they're accurate, then they're plenty good and "normal".

Pressure is a result of volume in a restriction. If you don't change the restriction but put more volume through it, as when installing a HV oil pump and make no other changes, then pressure can only be higher.

 

[m1dn]

I just watched mine today and it sits at about 25 psi (per the who knows if it's calibrated guage) when cruising down the road around 1300 rpm. Drops to about 20-ish when sitting at a light. Always has 50 when cold for comparison

So mine is exactly the same it seems, with maybe 2-4psi less, thanks for checking!

 

[m1dn]

Replacing valley cover, pressure sensor and valve cover gaskets today-tomorrow, waiting for final parts today.

3 bolts on valley cover were finger-loose, didnt have to put any effort to unscrewing them, they just moved completely freely.
Got the idea to check them thanks to this great forum some time ago

 

[B-train]

Good deal! I had a similar experience when I did mine. Once the o-rings give up the ghost, no more tension. Keep us posted to the results.

 

[Dustin Jackson]

@m1dn That valley looks very wet man, there is something happening in there that shouldn't be.

 

[ScottTheEngineer]

Hey folks!

Noticed i have lower than ideal oil pressure when yukon warms up.
Pickup tube seal most likely.

There is also small oil leak from the oil pan that i was going to tackle somewhere around April when it warms up and would be replacing pickup tube seal as well.

Wondering if it’s safe to drive with given pressure right now in shorter distances until April or park it and wait until i warms up?

Mine was the Overpressure bypass in the Oil pump. 1400 to get it replaced. Pressure hasn't gone below 40PSI since I had it replaced. Also, Why does this always happen when it's 8 deg outside? Can be a nice warm sunny day with a case of beer and a tool set.

 

[Charlie207]

(per the who knows if it's calibrated guage)

That's a good point. I have replaced the oil pressure sensor (such a fun job to practice my planks on) and when I first got my truck it seemed to have normal oil pressure when cold and hot, so that I never paid attention to it until it started reading 135psi one day, and 3psi the next day, and all in between.

Installing a new sensor got rid of the random pressure readings, but maybe? moved the operating range 5psi lower than when I first started driving it.

 

[B-train]

I would agree with you. There are so many manufacturers of the pressure sensor that there is bound to be variations. As long as your pendulum doesn't swing and get stuck at either extreme, but hangs out in the middle zone you're good to go.

 

[m1dn]

@m1dn That valley looks very wet man, there is something happening in there that shouldn't be.

Yep, 3 bolts on it were completely loose, others not tight either, so oil was spitting out under pressure.

When i mean completely loose i mean like completely, take one finger and unscrew it

 

[m1dn]

While waiting for oil pressure sensor i took old cover off and cleaned everything.
Turns out old sensor had no filter/screen inside, is it missing or some engines didn’t have one??

 

[Geotrash]

While waiting for oil pressure sensor i took old cover off and cleaned everything.
Turns out old sensor had no filter/screen inside, is it missing or some engines didn’t have one??

Your engine doesn't have AFM. Only AFM engines have the screen.

 

[m1dn]

Your engine doesn't have AFM. Only AFM engines have the screen.

I see! Weird because Dorman part pic had screen on it, but came without screen today lol.

Cleaned around a little, installed new valley cover, sensor and passenger side valve cover gasket with grommets.
Wife won’t let me finish other side with “are you done yet?”, so finishing driver side valve cover tomorrow and putting everything together!

Tomorrow we find if oil pressure changes and what did i forget when putting it back together

 

[m1dn]

Update: put everything back together, let’s see if oil leak stops.

Hot idle didn’t change, however cold and hot driving is now slightly higher.
Think ill consider it “acceptable” based on other posts here and tackle oil pan with pickup tube in the summer, when boat is out of garage

New stats:
- Cold idle: 40-45
- Cold driving onto the road: 40-45
- Hot idle at 500-550 rpm: 18-20
- Hot cruising at 1000 rpm: 25-28
- Hot WOT - 40-45 and angry looking people in the city

1st pic - idle in gear
2nd pic - idle in parking
3rd pic - cruising at 1000rpm

 

[jdwood1111]

Nice work! Where exactly was/is your oil leak? I am trying to pin point mine as well and wondering if it is the VLOM area and hoping it’s not the oil pan gasket or rear main.

For additional reference, my pressure on my 2011 6.2 is around 50-55 cold start, 37-44 cursing around and 20-25 hot idle.

 

[m1dn]

Nice work! Where exactly was/is your oil leak? I am trying to pin point mine as well and wondering if it is the VLOM area and hoping it’s not the oil pan gasket or rear main.

For additional reference, my pressure on my 2011 6.2 is around 50-55 cold start, 37-44 cursing around and 20-25 hot idle.

Still unsure, i think vlom plate!

P.S Anyone reading, when i changed my oil filter to PF48 from acdelco aka original intended, my oil pressure almost doubled to exactly same oil stats in post quoted, wow!

I previously had FRAM TG10060 on which is supposed to be superb filter, but looks like it was either bad or had crap oil flow

 

[Foggy]

Still unsure, i think vlom plate!

P.S Anyone reading, when i changed my oil filter to PF48 from acdelco aka original intended, my oil pressure almost doubled to exactly same oil stats in post quoted, wow!

I previously had FRAM TG10060 on which is supposed to be superb filter, but looks like it was either bad or had crap oil flow

Fram is SHIT.... Repeat: Fram is Shit
without DOD/AFM you just have a valley plate.. Not a VLOM plate

 

[donjetman]

Fram TG filters are 99% efficient @20 microns. Not many filters can say that.

 

[91RS]

It doesn't matter, the quality is TRASH. If I offered you a 1000hp car that broke every week vs. a 500hp car that broke twice a year, which would you pick?

 

[donjetman]

My vehicles for many yrs have gotten nothing but Fram Ultra and/or Titanium filters. Both are arguably the best filters made. I do used oil analysis. I post the results here. I cut open the filters and post here. Never an issue.