Running Temp

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Jan 11, 2011 | 07:48 PM

red_dog007

Thread Starter

Seasoned Member

Joined: Sep 2010

Posts: 306

Likes: 1

From: Chattanooga

Year: 1989

Model: Cherokee

Engine: 4.0L I6

Running Temp

What temp range should a Jeep 4.0L from 1989 be running at after it gets warmed up?

At what temp does the thermostat open at?

Jan 11, 2011 | 07:50 PM

billfrank85

Member

Joined: Sep 2010

Posts: 234

Likes: 1

From: Grand Rapids, MI

Year: 1994

Model: Cherokee

Engine: 4.0

190 - 210 F is pretty normal.

OEM thermostat should open at 195.

Jan 11, 2011 | 07:51 PM

89Laredo

CF Veteran

Joined: May 2009

Posts: 10,423

Likes: 61

Year: 2000

Model: Cherokee (XJ)

Engine: 4.0

~200-205 seems to be the norm.

Jan 11, 2011 | 07:54 PM

NCMetalMechanic

Member

Joined: Nov 2010

Posts: 182

Likes: 0

From: Charlotte

Year: 2000

Model: Cherokee

Engine: 4.slow

It runs at 195. Thermostat starts opening at about 185, fully open at 195.

Jan 11, 2011 | 08:09 PM

djb383

CF Veteran

Joined: Nov 2009

Posts: 8,172

Likes: 17

From: The Republic of TEXAS

Year: 1998

Model: Cherokee

Engine: 4.0L HO

FSM says the factory installed t-stat is closed below 195F.

Last edited by djb383; Jan 11, 2011 at 08:11 PM.

Jan 11, 2011 | 08:23 PM

djb383

CF Veteran

Joined: Nov 2009

Posts: 8,172

Likes: 17

From: The Republic of TEXAS

Year: 1998

Model: Cherokee

Engine: 4.0L HO

Quote:

Originally Posted by red_dog007

What temp range should a Jeep 4.0L from 1989 be running at after it gets warmed up?...............

This time of year, right at whatever t-stat you're running. Six mos. from now, temps can easily spike well north of 210. The XJ rad is kinda dinky.

Jan 11, 2011 | 09:02 PM

ken72

Senior Member

Joined: Jan 2010

Posts: 999

Likes: 0

From: Brentwood, TN

Year: 2001

Model: Cherokee

Engine: 4.0

I cruise on the Highway at 210 with a slight drop below 210 every so often. Sitting idle it will slowly rise above 210 and my fan cools it down.

Running Temp

Running Temp

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