Thermostat Temperature -
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back > Models > Jeep Cherokee & Comanche Forums > XJ Cherokee Technical Forum > Thermostat Temperature

End of Summer Sale, 20% OFF!2007 - 2011 Jeep JK Long Arm Lift KitsIntroducing MONSTALINER™ UV Permanent DIY Roll On Bed Line

Unread 05-30-2011, 08:47 PM   #1
Registered User
2000 XJ Cherokee 
Join Date: Apr 2011
Location: Waukesha, Wisconsin
Posts: 7
Thermostat Temperature

What Temperature should my thermostat be running at? It's running at 210 degrees, is that normal?

CRunning1 is offline   Reply With Quote
Unread 05-30-2011, 08:52 PM   #2
Registered User
2001 XJ Cherokee 
Join Date: Aug 2008
Location: San Angelo
Posts: 127
Yes that's the normal temp for these engines.
sargergp is offline   Reply With Quote
Unread 05-30-2011, 09:26 PM   #3
Registered User
Join Date: Aug 2004
Location: South Bay Los Angeles, CA
Posts: 2,534
210'F is the stock operating temp. All is well with your motor.

Do be aware that if the temp creeps up at a hot idle as the weather gets warmer, you may have a worn out fan clutch. Typical lifespan is 5 years or so, in this case, the temp will sit above 210'F with the e-fan cycling in and out with no noticeable temp drop...first suspect is not your thermostat but your $35 fan clutch.
Newly Painted! Emerald Green '96 XJ 4x4 4.0 HO 5-spd
3" Lift + 31" Tires / D35 TracLok / NP231
Drilled out Stock Airbox / Gauge Cluster Upgrade
Magnaflow Muffler / High-flo Cat / MSD Coil
BrunoS is offline   Reply With Quote
Unread 05-31-2011, 05:08 AM   #4
It's the crank sensor!
tjwalker's Avatar
1999 XJ Cherokee 
Join Date: Nov 2007
Location: Central Minnesota, MN
Posts: 8,432
The 4.0 comes from the factory with the 195 degree thermostat. This is the correct thermostat for most stock 4.0 applications.

The engine coolant temperature (which is what you're reading on your dash) is usually between 200-210.

Just because you have a 195 degree thermostat doesn't mean that the engine will run at 195. The thermostat does NOT control the maximum operating temperature of the engine, rather it is the approximate temperature where the thermostat "opens".
99 Cherokee, 4.0 AW4, NP242
Past Jeeps: 49 Willys, 81 Scrambler, 88 Comanche
Without "data", all you have is an opinion!
tjwalker is offline   Reply With Quote
Thread Tools

Suggested Threads

Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. is not in any way associated with Jeep or the Chrysler Corp.