My Radiator Fan Cooling Runs Slow - Jeep Garage - Jeep Forum

Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WJ

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 08-16-2015, 07:38 PM
CeuX's Avatar
Member
 
Join Date: May 2012
Posts: 43
Thanks: 31
Thanked 0 Times in 0 Posts
Rep Power: 1750
CeuX is on a distinguished road
My Radiator Fan Cooling Runs Slow

Hello everyone, I have Jeep Grand Cherokee Limited 2002 4.7L V8 Natural Gas, 4X4 WJ. Looking at my radiator fan I note that ran slow.No overheating yet, but I changed the radiator twice in two years. And it is a hydraulic model. I also saw that I could stop the fan with my hand. But. Is that normal on Hydraulic ones??.

PS: The temperature its OK only half in extreme cases. Like after traveling for three hours straight
.

Thank You.

Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 08-17-2015, 08:31 AM
Frango100's Avatar
The beast from Brazil

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 7,330
Thanks: 17
Thanked 378 Times in 365 Posts
Rep Power: 529494
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: My Radiator Fan Cooling Runs Slow

The hydraulic cooling fan should run between 300-500 rpm with engine idling and engine temp normal. I have never tried to stop the fan on my jeep, but this doesnt seem to be normal. I would remove the coolant temp sensor connector, to see if the fan goes to high speed, as a test. You will get a check engine light with related dtc for the coolant temp sensor, which has to be errased after reconnecting the connector.
__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
The Following User Says Thank You to Frango100 For This Useful Post:
  #3  
Old 08-17-2015, 05:32 PM
CeuX's Avatar
Member
 
Join Date: May 2012
Posts: 43
Thanks: 31
Thanked 0 Times in 0 Posts
Rep Power: 1750
CeuX is on a distinguished road
Re: My Radiator Fan Cooling Runs Slow

Yes, the fan goes to high speed when i disconnect the sensor other than that is always on slow speed. You think that the sensor have to be replaced?
Thank you.

Reply With Quote
  #4  
Old 08-17-2015, 06:05 PM
Frango100's Avatar
The beast from Brazil

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 7,330
Thanks: 17
Thanked 378 Times in 365 Posts
Rep Power: 529494
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: My Radiator Fan Cooling Runs Slow

As long as the coolant temperature is in normal range and the AC works ok, i would not bother too much about it. If the sensor doesnt work well, then the coolant temp indication will be of as well. You could check the coolant temperature with an infrared temp gun and compare it to the indicated temp on the instrument panel.
__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
The Following User Says Thank You to Frango100 For This Useful Post:
  #5  
Old 08-17-2015, 06:21 PM
CeuX's Avatar
Member
 
Join Date: May 2012
Posts: 43
Thanks: 31
Thanked 0 Times in 0 Posts
Rep Power: 1750
CeuX is on a distinguished road
Re: My Radiator Fan Cooling Runs Slow

Ok I would do that first. Also I check the price for that Temp sensor on my Jeep an is
$37 Original Mopar. Thank You. If you check your fan and you can stop it by hand let me know. THANK YOU
Reply With Quote
  #6  
Old 08-18-2015, 05:53 PM
CeuX's Avatar
Member
 
Join Date: May 2012
Posts: 43
Thanks: 31
Thanked 0 Times in 0 Posts
Rep Power: 1750
CeuX is on a distinguished road
Re: My Radiator Fan Cooling Runs Slow

Here one photo from my coolant temp. Screenshot by Lightshot
Also this video show the same problem that I have with my fan.

Normally my temp its here: http://prntscr.com/86lhng
Reply With Quote
  #7  
Old 08-18-2015, 07:07 PM
Frango100's Avatar
The beast from Brazil

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 7,330
Thanks: 17
Thanked 378 Times in 365 Posts
Rep Power: 529494
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: My Radiator Fan Cooling Runs Slow

Your coolant temperature indication is perfectly normal. I didnt try stopping the fan yet, just looking for some assistant who doesnt need all those fingers.
__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
The Following User Says Thank You to Frango100 For This Useful Post:
  #8  
Old 09-19-2015, 09:44 AM
frenchdragon's Avatar
Member
My Jeep: 2000 4.0L WJ
 
Join Date: Jul 2015
Location: Manlius, NY
Posts: 33
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 606
frenchdragon is on a distinguished road
Re: My Radiator Fan Cooling Runs Slow

Quote:
Originally Posted by Frango100 View Post
Your coolant temperature indication is perfectly normal. I didnt try stopping the fan yet, just looking for some assistant who doesnt need all those fingers.
Try using a house paint brush. About 4" wide.
Reply With Quote
The Following User Says Thank You to frenchdragon For This Useful Post:
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
A glitch I've not seen discussed: UConnect clock runs slow... Avusblue Audio/Visual/Navigation 13 01-30-2015 12:24 PM
Radiator fan always runs when raining at idle vertrkr 2011+ Dodge Durango-WD 13 12-20-2014 12:22 PM
99 WJ Blower fan runs constantly Rottweiler123 Troubleshooting/Problems 5 12-15-2011 12:45 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 11:11 AM.


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

JeepGarage.org is in no way associated with or endorsed by FCA US LLC. Chrysler, Dodge, Jeep, Ram, Mopar and SRT are registered trademarks of FCA US LLC.