Oil Pressure...

eld101 · 11-11-2009, 09:39 AM

I just got a 2002 Jeep Cherokee. While driving I noticed that the Oil pressure is typically at "3/4" on the gauge which seemed kinda high for normal highway driving.

The manual specifies that it should maintain 45-70psi on the highway but there are no pressures on the gauge so I have no idea what its actually running. Anyone have some light on this?

Thanks,
Eric

Jeepjunky · 11-12-2009, 04:12 PM

im not sure wat the number 4 ur cherokee go up 2, but on my '93 GC the highest oil pressure number is 80 so if that helps u in any way there u go

p.s. my dad and mom have been building oil/trans. pumps for race cars (NASCAR for the road races) and off-road trucks (alot of the big Names in the TORC series) for 15 years, so ya.

eld101 · 11-12-2009, 10:46 PM

really?

Jeepjunky · 11-13-2009, 04:35 PM

Ya and my jeep when I rev it is round 70(3/4 on gauge) and at 40-50(1/2-5/8 on gauge) at idol does that help

seed · 11-14-2009, 09:08 PM

The oil pressure gauge on a 2002 grand does NOT read "actual pressure",it is simply a switch,on/off...good/bad

stinkypete85 · 12-07-2009, 02:24 AM

Either way it sounds fine. You could try a lighter weight oil if you find that it really is running at too high of a pressure.

11-11-2009, 09:39 AM	#1
eld101 Newbie Join Date: Nov 2009 Posts: 2 My Photos	Oil Pressure... I just got a 2002 Jeep Cherokee. While driving I noticed that the Oil pressure is typically at "3/4" on the gauge which seemed kinda high for normal highway driving. The manual specifies that it should maintain 45-70psi on the highway but there are no pressures on the gauge so I have no idea what its actually running. Anyone have some light on this? Thanks, Eric

11-13-2009, 04:35 PM	#4
Jeepjunky Junior Member Join Date: Oct 2009 Location: eagle River, WI Posts: 70 My Photos 1993 Grand Cherokee Year: 1993 Model: Grand Cherokee Engine: I6 40L Transmission: Automatic	Ya and my jeep when I rev it is round 70(3/4 on gauge) and at 40-50(1/2-5/8 on gauge) at idol does that help Last edited by Jeepjunky; 11-13-2009 at 05:03 PM..

11-14-2009, 09:08 PM	#5
seed Senior Member Join Date: Sep 2008 Location: pa Posts: 762 My Photos 2000 Grand Cherokee Year: 2000 Model: Grand Cherokee Engine: 4.0 Transfer Case: 242 Tires: 285/75/16 Lift Specifications: 4" iror	The oil pressure gauge on a 2002 grand does NOT read "actual pressure",it is simply a switch,on/off...good/bad __________________ 2000 laredo lifted & stuff

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11-12-2009, 04:12 PM	#2
Jeepjunky Junior Member Join Date: Oct 2009 Location: eagle River, WI Posts: 70 My Photos 1993 Grand Cherokee Year: 1993 Model: Grand Cherokee Engine: I6 40L Transmission: Automatic	im not sure wat the number 4 ur cherokee go up 2, but on my '93 GC the highest oil pressure number is 80 so if that helps u in any way there u go p.s. my dad and mom have been building oil/trans. pumps for race cars (NASCAR for the road races) and off-road trucks (alot of the big Names in the TORC series) for 15 years, so ya.

11-12-2009, 10:46 PM	#3
eld101 Newbie Join Date: Nov 2009 Posts: 2 My Photos	really?

12-07-2009, 02:24 AM	#6
stinkypete85 Newbie Join Date: Dec 2009 Location: Ashtabula Ohio (NE) Posts: 25 My Photos 1994 Cherokee Year: 1994 Model: Cherokee Engine: 4.0 H.O. Transmission: AX15 5 Speed Transfer Case: NP231 Front Axle: Dana 30 Rear Axle: Dana 35	Either way it sounds fine. You could try a lighter weight oil if you find that it really is running at too high of a pressure.

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