Oil Pressure and Coolant Temp checks

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Jan 15, 2011 | 11:26 PM

red_dog007

Thread Starter

Seasoned Member

Joined: Sep 2010

Posts: 306

Likes: 1

From: Chattanooga

Year: 1989

Model: Cherokee

Engine: 4.0L I6

Oil Pressure and Coolant Temp checks

Just checking these levels to see how normal and abnormal they are.

Oil Pressure Idle cold is 60+, hot is 20. When cruising around it is 40~60. Using 10w40 oil.
Engine temp stays around 160~180.

Jan 15, 2011 | 11:32 PM

89Laredo

CF Veteran

Joined: May 2009

Posts: 10,438

Likes: 73

Year: 2000

Model: Cherokee (XJ)

Engine: 4.0

oil pressure seems fine.
Temp is low

Jan 15, 2011 | 11:39 PM

WantACherokee

Seasoned Member

Joined: Oct 2009

Posts: 414

Likes: 0

From: Portland, Oregon

Year: 1991

Model: Cherokee

Engine: 4.0L

Seems like my temp is a little low too, if the gauge is accurate... what would cause that?

Jan 16, 2011 | 01:43 AM

red_dog007

Thread Starter

Seasoned Member

Joined: Sep 2010

Posts: 306

Likes: 1

From: Chattanooga

Year: 1989

Model: Cherokee

Engine: 4.0L I6

So what, an open thermostat?

Jan 16, 2011 | 06:34 AM

tjwalker

CF Veteran

Joined: Nov 2010

Posts: 5,841

Likes: 117

From: In the middle of Minnesota!

Year: 1999

Model: Cherokee

Engine: 4.0

Confirm your coolant temp. Get a hold of an infrared point and shoot thermometer (they are now very cheap!) and point it directly at the thermostat housing. Then you'll know.

Good data = good decisions.

If it is low, then start with a new thermostat. 195 degree. I buy mine from Jeep and also like the Stant Superstat. Stay away from no name el-cheapo thermostats. They are absolute junk.

The target temp for the 4.0 is in the 200-210 range. You need to be there...........