Confused on oil pressure

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May 25, 2013 | 10:54 AM

#16

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,578

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by Sparkys92XJ

I have a 92 5 speed with a crate motor with about 25k miles and mine runs the same way. 40 at idle and I a ill higher when driving. I've seen it shoot up around 60 before. So there's nothing to worry about! Low pressure is what you want to keep your eye on.

That's real nice for you sparky. But, the OP has something going on that ain't right.

May 25, 2013 | 11:06 AM

#17

Sparkys92XJ

Member

Joined: Feb 2013

Posts: 158

Likes: 0

From: Republic, mo

Year: 1992

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by cruiser54

That's real nice for you sparky. But, the OP has something going on that ain't right.

What does he have that's going wrong? He said that at idle his oil pressure is at 40. It was a general question on if it were normal.

May 25, 2013 | 11:07 AM

#18

Sparkys92XJ

Member

Joined: Feb 2013

Posts: 158

Likes: 0

From: Republic, mo

Year: 1992

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by worleyburd

So I came across some threads of people talking about their oil pressure. Well I have a 92 5 speed 4.0 HO
And my pressure stays about 40 at idle. People are saying it should be 10. Is that right or has my jeep just been messed up since I got it haha.

See ^^^^^ original post

May 25, 2013 | 11:15 AM

#19

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,578

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by Sparkys92XJ

See ^^^^^ original post

Sorry. Thought the OP said 100 PSI with factory and aftermarket gauge.

May 25, 2013 | 11:22 AM

#20

mitch500

Member

Joined: Jan 2013

Posts: 146

Likes: 0

From: Edmonton,Canada

Model: Cherokee

Engine: 4.0 H.O

After fully warmed up hot idle sits at about 30 and cruising speeds it's exactly in the middle at 40.

Jun 10, 2013 | 05:46 PM

#21

Buckeye

Newbie

Joined: Dec 2012

Posts: 9

Likes: 0

From: Dayton OH

Year: 1994

Model: Cherokee

Mine was sitting around 40 most of the time, but recently it goes up to around 50 when on the highway. Is there any reason for concern?

Jun 10, 2013 | 06:27 PM

#22

salad

Herp Derp Jerp

Joined: Nov 2011

Posts: 18,251

Likes: 17

From: Parham, ON

Year: 1999

Model: Cherokee

Engine: 4.0L OBD-II

Completely normal. Oil pressure increases with engine load and RPM

Jun 10, 2013 | 09:46 PM

#23

jebmccall

Senior Member

Joined: May 2011

Posts: 749

Likes: 1

Year: 1997

Model: Cherokee

Engine: 4.0

dont forget to factor in engine temp and outside air temp will mess with oil psi slightly... in the winter at 2000 rpms my oil psi stays at 50, during the summer its at 43 psi.

100 psi of oil psi is way too high though. have you verified it with a mechanical gauge? if so you defnitly have an issue.