Oil at 80 lbs. on 4.0?
- Thread starter Rynous
- Start date
What you're talking about is in theory if my engine actually has 80lbs of oil pressure. Even when my engine isn't on, it reads 45lbs of pressure. It's more than likely my sender unit is bad. They're known to go bad. My jeep has 141k on it anyway. But thanks for the heads up tho.
Thats true! hopefully a sensor. i had really low pressure had to do a full rebuild (crank and 2 pistons bad) had to go oversized bearings saw my oil pressure go up. I was a fool and added a thicker oil to try to make up for the low pressure but that obviously didnt do any good was just paying around before the rebuild.
Bloodlines33
Member
No. Maybe a dribble will come out the port. Some folks on here have used a pipe cleaner to remove sludge or buildup behind the sensor with varying degrees of success. I only swapped out the sensor. A socket designed for a sensor is nice but only worked with my new replacement, go figure.
And that pressurized air which does exist in the crank case and does need venting has nothing to do with oil pressure.
We're not checking oil pressure here, we're diagnosing instrumentation. The FSM will definatly have you hook up your DRB for that.
I missed these previous replies for some reason. This "theory" is wrong and he doesn't understand how engines work. You are right to suspect the sensor and not the actual oil pressure (which would be relieved by the oil relief bypass at 76psi iirc). Regardless, the oil pan area and area between the top of the head and the valve cover are not pressurized by the oil pump. Ever. They are after anywhere that would see oil pressure and the only thing they have to do with oil is to return unpressurized oil back to the pump pickup via gravity. He is confusing oil pressure with how the crank case (which includes both of the above mentioned areas) can and will be pressurized by blow by. That can lead to things like oil being pushed out past gaskets or your dipstick being pushed out and spraying oil out of the dipstick tube from the sump in extreme situations.
Hi rynous. Mine did the exact same thing and never moved from the spot. I replaced it with another one and the problem went away. You will need a special socket to get it off.
Mine did it today, all the way up to 80psi. Stopped at O'reilly and picked up the "Standard" brand oil pressure sender and it is working fine now at around 40psi. I used a 22mm deep socket and it worked great.
I went to oriellys the other day and replaced the sensor and like you said, my engine is back around 40lbs again
Hey guys, same problem for me out of nowhere. I’m assuming it’s just the sender, but if the oil pressure was actually high would there be any obvious symptoms? I won’t be home with my tools for a few days so I want to make sure it’s okay to wait and drive the car for now, instead of ignoring it if it’s actually high pressure
Also, will an impact socket work or just a normal feel socket? I saw a video saying it wouldn’t but I want to make sure before I buy a new socket
Also, will an impact socket work or just a normal feel socket? I saw a video saying it wouldn’t but I want to make sure before I buy a new socket
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I used an 1 1/16 or 1/8" open wrench.
Mine hits 80 for a couple of minutes when it's below 32°F. Once it warms up it drops to 40.
I'd put a manual test gauge and verify the dash gauge.
You might want to order a Mopar sensor to have on hand before they get discontinued.
10w30 Pennzoil conventional high mileage. I'm not the OP. Or the poster who brought this one back. =)
-Mac