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 04-21-2013, 04:16 PM
Member
My Jeep: 2002 4.7L WJ
 
Join Date: Jan 2011
Location: Rhode Island
Posts: 40
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 1412
Divo Kinevil is on a distinguished road
Heater core possible fix

I've been having some issue with the front windshield fogging up when I turned on the defroster. After doing some searching on here I narrowed it down to a heater core going bad. Took it to a trusted mechanic because I don't have the patient or the time to try and replace the heater core myself due to how extensive it is on the wj. My mechanic told me I was better off selling and looking into something new because it wasn't worth the bill. I'd rather not pick up a car payment since I'm trying to save for a house so I took a chance and spent $20 at autozone on a radiator repair and so far things are getting better. If anyone is having the same issue I know there are a few threads of people looking for options so I wanted to put it out there that depending on how bad your problem may be this fix may just help out. Just make sure you turn the heater on when running the product through the radiator so it cycles through the heater core!!
__________________

__________________
Reply With Quote
  #2  
Old 04-21-2013, 05:11 PM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 5,053
Thanks: 9
Thanked 102 Times in 95 Posts
Rep Power: 526039
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: Heater core possible fix

Quote:
Originally Posted by Divo Kinevil View Post
. Just make sure you turn the heater on when running the product through the radiator so it cycles through the heater core!!
As soon as the engine runs, the coolant goes through the heater core, there is no shutoff valve or alike. Heating is only regulated with the blend doors, which let air pass through the heater core or bypass it.
__________________

__________________
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
  #3  
Old 04-21-2013, 06:05 PM
Member
My Jeep: 2002 4.7L WJ
 
Join Date: Jan 2011
Location: Rhode Island
Posts: 40
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 1412
Divo Kinevil is on a distinguished road
Good to know. I thought it was regulated. Thanks for the insight. Just happy it worked for me I feel like I dodged a huge bullet
__________________
Reply With Quote
  #4  
Old 04-22-2013, 07:16 PM
Member
My Jeep: 2002 4.7L WJ
 
Join Date: Aug 2012
Location: North Carolina
Posts: 45
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 847
Thumper828 is on a distinguished road
Re: Heater core possible fix

I just went through the same thing with heater core. Pull back passengers side carpet and check for anti-freeze. If heater core is leaking they'll probably be some under there. Dry it out and keep a check on it.
__________________
Reply With Quote
  #5  
Old 04-23-2013, 08:45 AM
Member
My Jeep: 2002 4.7L WJ
 
Join Date: Jan 2011
Location: Rhode Island
Posts: 40
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 1412
Divo Kinevil is on a distinguished road
Re: Heater core possible fix

Quote:
Originally Posted by Thumper828 View Post
I just went through the same thing with heater core. Pull back passengers side carpet and check for anti-freeze. If heater core is leaking they'll probably be some under there. Dry it out and keep a check on it.
I never had any heavy leaking just a smell when the blower was on the 3rd or 4th setting. My biggest pet peeve was the film it would leave on my windshield.
__________________
Reply With Quote
  #6  
Old 05-12-2013, 04:30 AM
New Member
 
Join Date: Oct 2012
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
dave_samoa is on a distinguished road
Re: Heater core possible fix

I just used Bars-Leak, the copper one and it seems to be working! It cost me $8 at walmart and I only removed the radiator cap, not the whole dash!!!
__________________
Reply With Quote
  #7  
Old 05-12-2013, 05:26 AM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 5,053
Thanks: 9
Thanked 102 Times in 95 Posts
Rep Power: 526039
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: Heater core possible fix

Quote:
Originally Posted by dave_samoa View Post
I just used Bars-Leak, the copper one and it seems to be working! It cost me $8 at walmart and I only removed the radiator cap, not the whole dash!!!
Not so sure about the stop leak products. I see it more as a temporary solution. There are products which can also cause the small coolant passages in the heater core and radiator to be blocked. Why did you use the copper one, since the radiator and heater core are aluminum?
__________________
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
  #8  
Old 05-12-2013, 11:00 PM
Member
 
Join Date: May 2011
Posts: 656
Thanks: 18
Thanked 12 Times in 12 Posts
Rep Power: 3633
Jamesla30 has a reputation beyond reputeJamesla30 has a reputation beyond reputeJamesla30 has a reputation beyond reputeJamesla30 has a reputation beyond reputeJamesla30 has a reputation beyond reputeJamesla30 has a reputation beyond reputeJamesla30 has a reputation beyond reputeJamesla30 has a reputation beyond reputeJamesla30 has a reputation beyond reputeJamesla30 has a reputation beyond reputeJamesla30 has a reputation beyond repute
Re: Heater core possible fix

I had the exact same symptoms and problem and also solved with stop leak. I actually hated doing it, as that stuff can really mess stuff up. But it's a 99 with 150k and a $800 heater core replacement just isnt' worth it. Most feedback I found seemed to think the stop-leak would work for 2-3 years or more. I will be selling mine soon, and it has been working great since I did it about 6 months ago.

You said you don't have leaking anywhere, but you probably do... if you look under the passenger side compartment, way under the glove box, up to the front of the carpet... there is a heater vent right there. Pull the carpet down a bit from that, and you might discover your leak. it doesn't gush, but you'll see where it is running.

I agree, the worst part is the smell everytime the vents turn on. I think mine is finally starting to get evaporated so it isn't quite as bad. Inhaling those fumes forever can't be good for us
__________________

__________________
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
Heater Core Thumper828 Troubleshooting/Problems 1 03-04-2013 10:57 PM
heater core petemurp Compass and Patriot 1 12-26-2012 05:30 PM
Heater core problems, perhaps...? blackbetty Troubleshooting/Problems 4 08-07-2012 12:20 PM
Heater Core? bigukcatfan Tech Tips/DIY/How to 3 07-29-2012 08:11 PM
Heater Core Busted Hemi_05 Detailing 3 05-13-2010 11:47 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 03:28 AM.


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

JeepGarage.org is in no way associated with or endorsed by Chrysler Group LLC.