Oil pressure goes from 50 to 20 as it warms up
08-17-2012, 08:45 PM
#1
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Model: Cherokee
Oil pressure goes from 50 to 20 as it warms up
I have a 95 Cherokee 4.0 inline 6. When the engine is cold the oil pressure is around 50 but as the engine warms up it slowly goes to about 20 psi and there is a slight loss of power but it still runs alright. Any ideas would be helpful
08-17-2012, 08:54 PM
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Year: 1999
Model: Cherokee
Engine: 4.0
If you are saying the oil pressure is 20 psi at hot idle, the minimum oil pressure is 13 psi. If it's 20 psi at, or above, 1500 RPM (Cruise) then I would be concerned.
08-17-2012, 10:01 PM
#3
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Year: 2004
Model: Grand Cherokee
Engine: 2000 4.0
Consider yourself blessed. Mine has run 4 psi at hot idle ever since I bought it. It has been this way for so long I don't worry about it anymore.
08-17-2012, 11:06 PM
#4
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Model: Cherokee
Thanks for the input. What do you think about the loss of power it's like your hauling a loaded trailer. It doesn't do it all the time but mostly when at normal running temp. I'm new to jeeps so any help would be much appreciated. Thanks
08-17-2012, 11:22 PM
#5
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Year: 92
Model: Cherokee
Engine: 4.0
Sounds like the cadilatic converter maybe clogged up .this would cause loss of power and might smell like rotton eggs when it gets hot
08-18-2012, 04:49 AM
#6
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Year: 1994
Model: Cherokee
Engine: 5.2
when u have the loss of power condition, take notice and see if the transmission is shifting gears, or if it is starting in 3rd. I seen this a few times, no power at all off the start.
08-18-2012, 08:36 AM
#7
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Year: 1990
Model: Cherokee
Engine: 4.0
normal. I hooked up a mechanical gauge to mine, 60psi start up, 20 psi hot. loss of power could be a number of things...maybe clarify the situation a little better for us?
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