Jeep Garage  - Jeep Forum

Jeep Garage - Jeep Forum (
-   Grand Cherokee - WK2 - (
-   -   Hemi Operating Temperatures? (

J13ntv 11-26-2011 06:03 PM

Hemi Operating Temperatures?
Just curious what the normal operating temperature is of the hemi users. I had an experience today and noticed it seems to be running warm, 225 and I shut it off, this is idling.. I noticed the fan on around 200 degrees and then it turned off and that's when it started to rise. I know when driving and most of the time 203 seems to be the average number I remember.

So for the people who pay attention to the digital gauge what temps have you seen and average?

jp467 11-26-2011 07:22 PM

Re: Hemi Operating Temperatures?
The fan on mine comes on at around 225.

J13ntv 11-26-2011 07:40 PM

Re: Hemi Operating Temperatures?
Thanks. I've read your posts when I was searching the forums before I posted to see about similar questions but only saw you post and like one other person. Must be others out there that watch their gauge?? and/or know their fan parameters lol

J13ntv 11-27-2011 08:24 AM

Re: Hemi Operating Temperatures?
Bump. :)

moosehead 11-27-2011 03:16 PM

Re: Hemi Operating Temperatures?
J, mine runs in the low 200's a majority of the time. Only tops 225 when towing a hefty 5k boat uphill or WOT hauling arse uphill. Ambient temps rarely hit 90F here in the summers.

J13ntv 11-27-2011 08:41 PM

Re: Hemi Operating Temperatures?
Thanks Moose, have you ever looked at the temp when idling for a few minutes, say +5 minutes when engine is already warm? Does it reach 220's then back down?

ryorde 11-28-2011 09:19 PM

Re: Hemi Operating Temperatures?
My temps are about the same as yours. Normal for me is between 200 and 215. Ive seen as high as 225 once in a while.

ahmedelghoneimy 10-22-2012 08:49 AM

Re: Hemi Operating Temperatures?
My Jeep Commander 5.7L HEMI 2009, the operation temp before 50000KM was in middle meaning 212 but after that noted its reach 233 when driving in dunes (Egyptian Desert temp 100 F) and return to 202 when the fan high speed become active (it's Hydraulic Fan take power from Power Steering Pump ) then i feel heavy vibration and low engine power
went to dealer make long check but no faults told me this is normal temp but the vibration comes from power steering Pump which need to e replaced by new one, they install new one and went to the desert again i found the temp still go to 230 233 and come down again but no vibration and no lose engine power, retuned to dealer they changed the main fan but the temp still the same no change in normal driving its visit 226 in rush hours and come down in high speed and visit 233 in the desert then come down again
i am convinced that this is not normal as i know my car before reach 50000km and now it's 88000km and the temp more that before but the car doesn't give any fault or any warning light it still able to tow other cars in desert and run
what you think the dealer miss!!!

trelos78 10-22-2012 10:13 AM

Re: Hemi Operating Temperatures?
My temp on my wk2 hemi was about 220.....then I got myself a Motorad 180 degree stat and now on the highway it's about 183 and city driving around 205. Runs much much better and no issues!!!!

ahmedelghoneimy 10-22-2012 11:41 AM

Re: Hemi Operating Temperatures?
What is motorad ? Is it treatment and should say motoraid

trelos78 10-22-2012 12:20 PM

Re: Hemi Operating Temperatures?
No..... Motorad is the brand of thermostat

ahmedelghoneimy 10-22-2012 12:28 PM

Re: Hemi Operating Temperatures?
Ok please send me web link for this thermo. I understood that i replace the original one with this ?

All times are GMT -5. The time now is 06:14 AM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community