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

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 05-12-2011, 07:14 PM
Member
 
Join Date: Nov 2010
Location: Bay Area and Reno
Posts: 141
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 1503
FredoinSF is on a distinguished road
Coolant low warning on - again...

A couple of days ago the coolant low warning came on again. Last time was around Christmas and the problem quickly became clear: the Jeep had a pretty good leak from the radiator.

One new radiator and 8,000 miles or so later, the warning is back and indeed, the expansion tank is right at the low level. I am not seeing any obvious leaks at the hoses, radiator, or water pump. I am not seeing white smoke or anything unusual with the oil.

Since I am not seeing any visible sign of where the coolant went, I am puzzled and concerned it may be the very start of a head gasket leak. I am taking the car to my mechanic tomorrow for a leak test, but in the mean time any thoughts from this group would be appreciated. I hope it's not anything major and that it can be fixed fast cuz this thing has to get me from Reno to the Bay Area on Sunday.
__________________

__________________
Reply With Quote
  #2  
Old 05-12-2011, 07:25 PM
Chaoul1's Avatar
The Original

My Jeep: 2010 6.1L WK
 
Join Date: May 2009
Location: Fairfax, Virginia
Posts: 6,913
Thanks: 2
Thanked 24 Times in 24 Posts
Rep Power: 63339
Chaoul1 has a reputation beyond reputeChaoul1 has a reputation beyond reputeChaoul1 has a reputation beyond reputeChaoul1 has a reputation beyond reputeChaoul1 has a reputation beyond reputeChaoul1 has a reputation beyond reputeChaoul1 has a reputation beyond reputeChaoul1 has a reputation beyond reputeChaoul1 has a reputation beyond reputeChaoul1 has a reputation beyond reputeChaoul1 has a reputation beyond repute
Re: Coolant low warning on - again...

Check your Freeze Plugs and your Oil!
__________________

__________________
-Paul-
2010 Jeep Grand Cherokee SRT8

PaulsProfessional Automotive Detailing

PPAD's Custom Headlights

Contact for both DetailingPPADscustomwork@yahoo.com
Reply With Quote
  #3  
Old 05-12-2011, 09:08 PM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 4,667
Thanks: 9
Thanked 56 Times in 54 Posts
Rep Power: 525477
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: Coolant low warning on - again...

When the coolant gets into a combustion chamber, you normally can tell it by the special smell from the exhaust. If it took 8000 miles to get from the max level to the low level, it is a very small leak and therefore not so easy to detect. It can be something new and that it is a bigger leak, but i would start by refilling the expansion reservoir and keep a close look at it the next days.
__________________
Frank

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

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
  #4  
Old 05-16-2011, 05:01 PM
Member
 
Join Date: Nov 2010
Location: Bay Area and Reno
Posts: 141
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 1503
FredoinSF is on a distinguished road
Re: Coolant low warning on - again...

Thanks for the replies guys. Here's what happened since I first posted.

On Friday I went to have the Jeep tested. They did a hydrocarbon test and it came back positive which would mean I have a failed head gasket. This shop does not do the head gasket work on the 4.7L, so I went to couple of other shops to get quotes for that repair. Ouch... Every place I went to said the 4.7L is known for weak head gaskets and it is not unusual for them to fail at my mileage. They suggested having the work done ASAP - big surprise, huh? At one of the shops, the mechanic said anyone having the Jeep with the crappy 4.7L Mercedes Benz engine deserves what they get. I left...

Since the shops did not inspire high levels of confidence, I decided to do as Frango suggested and take a wait and monitor approach. So far so good but does anyone know a reputable Jeep shop either in the Bay Area or in Reno in case my coolant drops again? Are head gasket failures a common item on the 4.7L if they have not overheated and had regular coolant changes?
__________________
Reply With Quote
  #5  
Old 05-16-2011, 06:19 PM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 4,667
Thanks: 9
Thanked 56 Times in 54 Posts
Rep Power: 525477
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: Coolant low warning on - again...

What seems to be a more or less common problem is that corrosion on the head can create pitting and finally the head gasket can not seal anymore. Has to do with the different types of metal used for head and block and the different electrical potencial they have, causing the less potencial metal to "eat"away and causing the pitting. Don't say that this is your problem, but i found it already several times on the net.
__________________
Frank

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

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
  #6  
Old 05-16-2011, 06:21 PM
Senior Member
 
Join Date: Feb 2011
Posts: 3,143
Thanks: 73
Thanked 42 Times in 36 Posts
Rep Power: 533943
Amelie has a reputation beyond reputeAmelie has a reputation beyond reputeAmelie has a reputation beyond reputeAmelie has a reputation beyond reputeAmelie has a reputation beyond reputeAmelie has a reputation beyond reputeAmelie has a reputation beyond reputeAmelie has a reputation beyond reputeAmelie has a reputation beyond reputeAmelie has a reputation beyond reputeAmelie has a reputation beyond repute
Re: Coolant low warning on - again...

@Frango: An irrelevant question but Why on several of your posts does your font alternate between 2 different ones? Which looks to jump back and forth from Comic Sans MS to Times New Roman and so forth lol
__________________
Reply With Quote
  #7  
Old 05-16-2011, 06:58 PM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 4,667
Thanks: 9
Thanked 56 Times in 54 Posts
Rep Power: 525477
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: Coolant low warning on - again...

Good question, you are awake . Normally i use Comic Sans, but it can be that i copied something from the jeep manual which has an other font.
__________________
Frank

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

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
  #8  
Old 05-16-2011, 07:03 PM
Senior Member
 
Join Date: Feb 2011
Posts: 3,143
Thanks: 73
Thanked 42 Times in 36 Posts
Rep Power: 533943
Amelie has a reputation beyond reputeAmelie has a reputation beyond reputeAmelie has a reputation beyond reputeAmelie has a reputation beyond reputeAmelie has a reputation beyond reputeAmelie has a reputation beyond reputeAmelie has a reputation beyond reputeAmelie has a reputation beyond reputeAmelie has a reputation beyond reputeAmelie has a reputation beyond reputeAmelie has a reputation beyond repute
Re: Coolant low warning on - again...

Quote:
Originally Posted by Frango100 View Post
Good question, you are awake . Normally i use Comic Sans, but it can be that i copied something from the jeep manual which has an other font.
I can dig it
__________________

__________________
Reply With Quote
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
Coolant spray is gone! hawkman996 Trouble Shooting/Problems/Service 20 07-09-2011 02:09 PM
Coolant? Crestwood1001 Grand Cherokee - WK 9 04-26-2011 07:07 PM
Low coolant and upcoming shock replacement FredoinSF Troubleshooting/Problems 11 01-03-2011 10:02 PM
Need coolant asap... socalwk Grand Cherokee - WK 17 11-16-2010 01:21 AM
Disappearing Coolant 1 GRAND Grand Cherokee - WK 11 05-27-2010 07:42 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 11:10 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community