what is factory spec oil pressure/safe
#1
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Year: 1993
Model: Cherokee
Engine: I6
what is factory spec oil pressure/safe
IM running what the gauge is saying 20 psi at a 700 rpm idle and 40 psi at driving speed 50/60 mph. Is this normal. I just changed my oil with 10 30 rotela and a prolactor filter. 4.0 249500 miles
#2
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Year: 1998 Sport
Model: Cherokee
Engine: 4.0
13psi at warm idle minimum and if I'm not mistaken 30-60 psi at speed.
If you are not sure if it is reading correctly rent a mechanical pressure gauge from any auto parts store and verify.
If you are not sure if it is reading correctly rent a mechanical pressure gauge from any auto parts store and verify.
#3
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Year: 1993
Model: Cherokee
Engine: I6
Ok good IM in normal. I was hoping I wasn't going to have to get a different engine. I do have lifter tick but that's normal for these from what I understand
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Year: 1998 Sport
Model: Cherokee
Engine: 4.0
It the sound of the 4.0.
I have had one that would only run at 5psi at warm idle and it ran like that for over 5 years. At least until I rolled it.
Your pressure is fine.
I have had one that would only run at 5psi at warm idle and it ran like that for over 5 years. At least until I rolled it.
Your pressure is fine.
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#8
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Year: 1993
Model: Cherokee
Engine: I6
Originally Posted by bigbadon
Mine has 4-5psi at idle & 20 at highway speeds and purrs like a kitten and runs like a scalded dog......YOU ARE GOOD!!!!
#9
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Year: 2004
Model: Grand Cherokee
Engine: 2000 4.0
So does mine feels like 0-60 in 4 seconds. Still has it's get up and go. Ok keep an eye on it make sure it doesn't go Down lower. If it does I may consider in new rods and main bearings. The weird thing about it is I needed a oil change. Had a Lil condensation in the oil and it was coal black. I added a flush additive that breaks up sludge. I changed the oil and the pressure went down from how it was before the condensation problem started. I was running 60 at highway speeds and 40 at warm idle. Maybe check my sending unit? It's plugged in all the way with no oil in it.
#10
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
He could also have clogged the orifice leading to the oil pressure sender, or loosened a clog that was impeding flow and creating high pressure, or just had a failed filter.
Regardless a change in pressure after a treatment like that I would take very seriously.
Regardless a change in pressure after a treatment like that I would take very seriously.
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Year: 1993
Model: Cherokee
Engine: I6
The main pressure drop happened when I was getting condensation in the oil. The pressure didn't change after or during treatment. I started it one morning and the pressure was at 40 at highway speeds. I checked oil after work and seen the white chunks.
#15
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Year: 1993
Model: Cherokee
Engine: I6
Ya I figured out my oil problem...feeling pretty stupid bout it. Cherokees hold 5 quarts. Some reason I was thinking stupid and bought a gallon thinking that was enough and well it's not to fill the crank case and filter. Lol blonde moment