What is your oil pressure
#1
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Year: 1999
Model: Cherokee
Engine: 4.0
What is your oil pressure
I have researched this subject with out a satisfactory answer. So I figured Id ask a few of you. What is your oil pressure while driving and how low does it go at Idle.My 99xj,122xxx runs a consistant 50psi under load and drops to around 20-30psi @ idle. I have noticed on short trips it stays @ 30 during idle and after long hwy trips( about an hours worth @ 70mph) it will go as low as 20psi. Just curious as to what everybody else is running....Thanks
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Year: 1998
Model: Cherokee
Engine: 4.0 rebuilt w/ bored TB, banks header, upgraded ignition, 3 row rad, high flow h2o pump, 180* t-stat
thats normal. at idle, when cold, i run about 35 psi, under load about 55 psi. at operating temp idle sits about 15 psi and 45 to 50 under load.
#4
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nothing wrong with your oil pressure.
of all the 4.0's ive had (12) most average 40-45 psi at hiway speeds and at a hot idle 18-25.
If i remember right the FSM say 13 is the lowest acceptable at hot idle.
of all the 4.0's ive had (12) most average 40-45 psi at hiway speeds and at a hot idle 18-25.
If i remember right the FSM say 13 is the lowest acceptable at hot idle.
#5
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Year: 1999
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Engine: 4.0
Didnt think something was wrong. I just wanted a better comparison. Looking up the subject the results are very scattered. Other than myself and wife and of course you on the forum, I dont know anyone else with a cherokee. Just hoping to better educate myself,and maybe have a more concentraded place for the subject. Thanks for the responses!!Nice build by the way Tanner. Hoping to be able to get my lift and start my build in the next month or so!!
Last edited by AutomaticKrackr; 05-24-2010 at 12:18 PM.
#6
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Year: 2001
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Mine does the same thing. It starts out cold at 50psi and once warmed up it sits at 30psi. Under load warmed up it runs 50psi. Youre good to go.
#7
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mine bounces around as well.. 30-50 runnin.. on a hot idle mine drops down to nothin and i get a check gauges light.. might have a prob there.. checked with a friend his cherokee does the same thing.. replaced pump and still same thing!
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#12
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Year: 1999
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Definitly check it out.maybe sending unit.Hey thanks for all the posts.Made feel better about it!!
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