4.0 getting hot when stopper - JeepForum.com
Search  
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 JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > WJ Grand Cherokee Forum > 4.0 getting hot when stopper

Engo winches available at www.rockridge4wd.com! Free shippThe Original 3/8" Ruffstuff Diff Cover!Ruffstuff 3 Link Kit!

Reply
Unread 07-19-2013, 03:58 PM   #1
wyattwj123
Registered User
2000 WJ 
 
Join Date: Feb 2012
Location: sarasota, florida
Posts: 259
4.0 getting hot when stopper

Hey guys my grand cherokee usually runs right under 210 an just recently if I'm sitting for a few minutes it goes up to about 220-230! My electric fan I have a switch made for so I keep that running and I can cancel that out! The thermostat is only a few months old also. But when the engine was warm i got out popped the hood and spun the mechanical fan, I could spin it very easily! Is that normal when the engine is warm? Could that be my problem any help guys thanks!

wyattwj123 is offline   Reply With Quote
Unread 07-19-2013, 04:00 PM   #2
wyattwj123
Registered User
2000 WJ 
 
Join Date: Feb 2012
Location: sarasota, florida
Posts: 259
Haha stopped* sorry . .
wyattwj123 is offline   Reply With Quote
Unread 07-19-2013, 06:35 PM   #3
wyattwj123
Registered User
2000 WJ 
 
Join Date: Feb 2012
Location: sarasota, florida
Posts: 259
Anyone????? Need some help guys anything will help lol
wyattwj123 is offline   Reply With Quote
Unread 07-19-2013, 07:46 PM   #4
new2site
Registered User
2002 WJ 
 
Join Date: Jan 2012
Location: Orange county, CA
Posts: 733
The clutch fan will/should only spin about a 1/2 a revolution by a "swipe of the hand." ...not sure "how easily" yours spins...

I'd flush your radiator.....however it might be beyond that and a recore would be necessary..
new2site is offline   Reply With Quote
Unread 07-19-2013, 08:33 PM   #5
HavasuRat
Registered User
2004 WJ 
 
Join Date: Feb 2011
Location: LOS ANGELES, CA
Posts: 31
Wj

When you changed the thermostat did you "burp" the system? any air in the system will cause an overheat issue like you describe. Especially on a 4.0.
__________________
2004 Freedom 4.0, tow package, 3.73s, leather, rear seat removal mod, 2.5" springs, 3/4" spacers, zone shocks, IRO short arms all around, 2 inch A-arm spacer, zone extended sway bar links, JKS adjustable track bar, K&N drop in. 255/70-17 Falken Wild Peak A/T. Final lift height H/F 20 3/4" front, 21 3/4" rear.
HavasuRat is offline   Reply With Quote
Unread 07-19-2013, 09:03 PM   #6
new2site
Registered User
2002 WJ 
 
Join Date: Jan 2012
Location: Orange county, CA
Posts: 733
Quote:
Originally Posted by HavasuRat View Post
When you changed the thermostat did you "burp" the system? any air in the system will cause an overheat issue like you describe. Especially on a 4.0.
Very good point and is probably the problem...


This guy is even doing it on a GC 4.0 (ZJ) ...
new2site is offline   Reply With Quote
Unread 07-20-2013, 06:22 AM   #7
4Tom
Registered User
2001 WJ 
 
Join Date: Mar 2011
Location: Dublin, Ireland
Posts: 2,460
The electric fan is designed to come on when temperature raises when your at low speed or stopped in traffic.

Your idiot switch isn't isnt a good solution.
Fix your electric fan circuit.
If your blowing realys the electric fan is drawing too much current and needs to be replaced too.

If your driving normal speed and temperature is correct and electic fan isn't running then the mechanical fan is probably ok.

As previously said check no air trapped in coolant system.
__________________
WJ 2001 3.1TD
http://www.jeepforum.com/forum/f22/2001-wj-3-1td-1252959/

Tom
4Tom is offline   Reply With Quote
Unread 07-20-2013, 06:46 AM   #8
cykaaro
Registered User
2000 WJ 
 
Join Date: Apr 2012
Location: orangville, ON
Posts: 2,804
Yep. Even without your mechanical fan and just the electric fan, since the mechnical was for extra cooling with towing, you should have heating issues at all.

The only thing a secondary switch is good for is in an emergency if it's not cooling, as in, the electric fan is not coming on. I've left mine inand working on permanently putting it in by way of a relay. You don't want it to backfeed power into the electrical.
__________________
The beatings will continue until attitudes improve!

HID Quad bi-xenon + foglight retrofit
http://www.hidplanet.com/forums/showthread.php?44572-Jeep-2000-Grand-Cherokee-WJ
cykaaro is offline   Reply With Quote
Unread 07-26-2013, 10:34 AM   #9
wyattwj123
Registered User
2000 WJ 
 
Join Date: Feb 2012
Location: sarasota, florida
Posts: 259
Ok guys so the electric fan I fixed still getting a little to warm when sitting for a few minutes but if I turn the heat on it will go back to operating temp?
wyattwj123 is offline   Reply With Quote
Unread 07-26-2013, 04:38 PM   #10
4Tom
Registered User
2001 WJ 
 
Join Date: Mar 2011
Location: Dublin, Ireland
Posts: 2,460
With electric fan working correctly the only other thing it can be is lack of coolant flow. Either blockage in radiator or defective pump.

But before you go changing out parts is there any sign of head gasket problems ?
__________________
WJ 2001 3.1TD
http://www.jeepforum.com/forum/f22/2001-wj-3-1td-1252959/

Tom
4Tom is offline   Reply With Quote
Unread 07-26-2013, 05:47 PM   #11
tim0
Member
 
tim0's Avatar
2002 WJ 
 
Join Date: Sep 2012
Location: Kansas City, Kansas
Posts: 216
When you connected the switch to your fan what did you connect it to?
The original relay or just direct to the switch and battery?
Do you have enough power to the fan for propper cooling?
tim0 is offline   Reply With Quote
Unread 07-26-2013, 06:27 PM   #12
4Tom
Registered User
2001 WJ 
 
Join Date: Mar 2011
Location: Dublin, Ireland
Posts: 2,460
Quote:
Originally Posted by tim0 View Post
When you connected the switch to your fan what did you connect it to?
The original relay or just direct to the switch and battery?
Do you have enough power to the fan for propper cooling?
I would guess it was a switch to the battery. It runs it at full speed when switch on. The draw back is it requires driver to watch the temperature gauge like a hawk and switch it on before temperature rises.
Its common to see this done when the relay has gone faulty. The draw back is we are human, sooner or later we will forget and by time we notice engine is already too hot and damage done.

Some users will justify the switch saying electronic relay keeps blowing and ignore the problem of a faulty fan drawing too much current because its worn out.
__________________
WJ 2001 3.1TD
http://www.jeepforum.com/forum/f22/2001-wj-3-1td-1252959/

Tom
4Tom is offline   Reply With Quote
Unread 07-29-2013, 08:09 PM   #13
wyattwj123
Registered User
2000 WJ 
 
Join Date: Feb 2012
Location: sarasota, florida
Posts: 259
What does it mean if I turn the heat on it will go to operating temp
wyattwj123 is offline   Reply With Quote
Unread 07-30-2013, 10:52 AM   #14
tim0
Member
 
tim0's Avatar
2002 WJ 
 
Join Date: Sep 2012
Location: Kansas City, Kansas
Posts: 216
If the engine runs cooler with the heater on then you are not cooling enough at the radiator. Check your clutch fan, spin it with the engine off. If it spins freely then its bad.
Check the speed of your electric fan.

Remember the fans will not provide cooling while driving above 30. If it gets hot above 30 then your radiator needs flushed, replaced or the thermostat is stuck.
tim0 is offline   Reply With Quote
Unread 07-30-2013, 05:35 PM   #15
madmax
Registered User
 
Join Date: Jan 2003
Location: Southern California
Posts: 181
WyattWj123,

The best solution is to remove the switch and put all the wires back where they were (by the factory). The fan switch will NOT solve your problem. The fan relay is controlled by PCM (computer). The PCM makes the decision when to turn on the fan and when to turn it off. Get a Mopar relay (don't get non-Mopar parts). Check your mechanical (water pump) fan, the clutch should function in normal operation, if not replace it.. Check all leaks - water pump, radiator, hoses, etc. The water pump should be in good condition. If the coolant is old (more than 2 years), flush it and add Zerex G-05 antifreeze and distilled water (50/50 mix). If you bought a thermostat from someplace else, replace it with Mopar-brand thermostat. I've read many stories from this forum saying that non-Mopar thermostat, especially these "fail-safe" thermostat, is causing problems (overheating, etc). It's best to stick with Mopar parts only.

Last month my radiator leaked, I replaced with many Mopar parts (hoses, clamps, radiator, fan relay, etc). Now, it runs at 205-208 degrees, even during the 100+ degree days, while sitting at idle at red-light traffic. I don't use worm-type clamps for the radiator hoses because they will not "expand" when it becomes hot. I use Mopar clamps, they always expand when it's hot, and shrinks when it's cool. Not a drop of leak using the tension-type clamps.
__________________
2000 WJ 4.0L, drop-in K&N filter, Addco rear antisway bar, Bridgestone Revos, Overhead DVD monitor w/ wireless headsets.

2007 BMW 335i, Montego Blue with Lemon seats, premium & sport package.

2004 TJ Sport 4.0L - SOLD :(
madmax is offline   Reply With Quote




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