Leaking Heater Core - JeepForum.com

Reply
 
LinkBack Thread Tools
post #1 of 18 Old 09-06-2008, 10:24 AM Thread Starter
CO_crawler
Registered User
1999 TJ Wrangler 
 
Join Date: May 2006
Location: Crested Butte, CO
Posts: 756
Leaking Heater Core

So, I have had clear water leaking out of my drip line for the heater core for about 9 months. I have always had heat and A/C, and the only problem that I can see is that I am losing coolant fluid levels. When is it time to replace the heater core? Are there problems with doing this with a TJ that has A/C like mine does? Thanks!

I just read that you have to take out the whole dash and drop the steering column....


CO_Crawler

Crawlin Slow Some Where in CO
CO_crawler is offline  
Sponsored Links
Advertisement
 
post #2 of 18 Old 09-06-2008, 10:58 AM
LJameson
Registered User
1990 YJ Wrangler 
 
Join Date: Jun 2008
Location: Central Oregon!
Posts: 3,829
Are you sure it's the heater core? Earlier TJ's have a common problem of leaking the condensation from the A/C into the passenger floorboard. Also, you say the drip line? Are you sure that isn't just the condensation from A/C? If so, thats completely normal. In fact, you want that. Just keep on mind that the A/C runs when it's on the defrost settings too.

1990 YJ-The wheeler
2015 JK- The DD
LJameson is offline  
post #3 of 18 Old 09-06-2008, 11:18 AM
BringThaPain
Registered User
1997 TJ Wrangler 
 
Join Date: Aug 2008
Location: Texas
Posts: 285
My 97 leaks condensation of the passenger side at times too. A bad heater core will be noticeable, as in you will smell antifreeze coming out of your vents.
BringThaPain is offline  
post #4 of 18 Old 09-06-2008, 11:29 AM
Sarge37
Registered User
2005 TJ Wrangler 
 
Join Date: Oct 2001
Location: Alabama
Posts: 165
If it is the heater core leaking, you can try some good stop leak from any auto store. Make sure to follow instructions and run the heater when you put it in the radiator.

"If It Aint Broke, Fix It Till It Is!!!!!"
05 TJ Rubicon, 4.0L, 6 Speed.
07 Ram 1500 Quad Cab
Sarge37 is offline  
post #5 of 18 Old 09-06-2008, 12:30 PM
UTWeezul
Registered User
1998 TJ Wrangler 
 
Join Date: Jan 2006
Location: Memphis, TN
Posts: 2,185
If it is the heater core, I feel sorry for you. Mine went out and was a pain to get to and replace. You will also need the A/C system evacuated before doing the removal/install.

35" MTR Kevlars
TNT Phantom Fenders/PSC Comp Cut corners
HP30 and 8.8 w/ lockers
103" Wheelbase
UTWeezul is offline  
post #6 of 18 Old 09-06-2008, 12:37 PM
durango-bob
Registered User
2000 TJ Wrangler 
 
Join Date: Jul 2008
Location: Sioux Falls
Posts: 3,111
Since you said that the fluid that was coming out of the hose was clear, I would say that it was just condensed water from the AC system. So your heater core sounds OK to me. As for coolant being lost, do you ever see the overflow bottle dripping any out? Is your exhaust smoke white? Is your radiator cap good and is it tight? Is there any sign of coolant leaking from the radiator where the plastic tanks are connected to the heat exchanger? Is the overflow hose properly attached at both ends? Do you ever see puddles of coolant under the Jeep after it has been driven and parked?
durango-bob is offline  
post #7 of 18 Old 09-06-2008, 12:38 PM Thread Starter
CO_crawler
Registered User
1999 TJ Wrangler 
 
Join Date: May 2006
Location: Crested Butte, CO
Posts: 756
Uh NO stop leak is the worst thing ever to put into you cooling system. Appears that the heater core is fine but my radiator fluid is brown. Looks like the used car dealer or previous owner used stop leak on this and it is disgusting, will need all new hoses, radiator, etc....the works. I am not taking this one out on the trail next week in crested butte either....that sucks.

CO_Crawler

Crawlin Slow Some Where in CO
CO_crawler is offline  
post #8 of 18 Old 09-06-2008, 01:20 PM
LJameson
Registered User
1990 YJ Wrangler 
 
Join Date: Jun 2008
Location: Central Oregon!
Posts: 3,829
Quote:
Originally Posted by CO_crawler View Post
Uh NO stop leak is the worst thing ever to put into you cooling system. Appears that the heater core is fine but my radiator fluid is brown. Looks like the used car dealer or previous owner used stop leak on this and it is disgusting, will need all new hoses, radiator, etc....the works. I am not taking this one out on the trail next week in crested butte either....that sucks.
I hear ya with that. I hate stop leak. When my grandpa had our CJ7, he took it to the shop to get a Freeze Plug fixed. Instead of fixing it, they put in leak stop. He wasen't happy with this, but couldn't do anything about it. Then when we pulled the engine out, we realized that the stop leak clogged the coolant passages from the block to the head! Not only that, but it looked like gravy...


1990 YJ-The wheeler
2015 JK- The DD
LJameson is offline  
post #9 of 18 Old 09-06-2008, 01:45 PM
Sarge37
Registered User
2005 TJ Wrangler 
 
Join Date: Oct 2001
Location: Alabama
Posts: 165
Yes I agree about the stop leak, it is a quick fix until you have the time or cash to do a permanant repair. I have replaced an AC Condensor on a 89 Daytona and had to remove the complete dash and console. It was an all day job. I agree that if it is clear water its not the heater core. You will smell it through the heater/AC vents if the core was leaking.

"If It Aint Broke, Fix It Till It Is!!!!!"
05 TJ Rubicon, 4.0L, 6 Speed.
07 Ram 1500 Quad Cab
Sarge37 is offline  
post #10 of 18 Old 09-07-2008, 09:11 PM Thread Starter
CO_crawler
Registered User
1999 TJ Wrangler 
 
Join Date: May 2006
Location: Crested Butte, CO
Posts: 756
yeah that pic is exactly what I am talking about. I tried to clean the overflow resevoir and it is like gum, cant get any of it out. That stuff is worthless. Is there anything that will disolve it the next time I flush my cooling system?

CO_Crawler

Crawlin Slow Some Where in CO
CO_crawler is offline  
post #11 of 18 Old 09-07-2008, 09:29 PM
jprs_peeprs
Registered User
2001 XJ Cherokee 
 
Join Date: Jul 2008
Location: WI
Posts: 152
Just Say NO! to stop leak...

C.
jprs_peeprs is offline  
post #12 of 18 Old 09-21-2008, 12:26 PM
myriad360
Registered User
2008 WJ 
 
Join Date: Oct 2006
Location: Moscow, ID
Posts: 551
Quote:
Originally Posted by jprs_peeprs View Post
Just Say NO! to stop leak...

C.
x2. Unless you like gumming up your cooling system and replacing all the heater core / radiator parts later because they are so gummed up, they don't cool anymore. This is why I am doing my heater core... somone put that stuff in there, and it no longer recirculates any coolant into the heater core.

You would be way better off just bypassing whatever unit you are trying to stop leak, since that is pretty much what you are doing with it. Worthless gunk.

Great XJ Troubleshooting/mod sites list: http://myriad360.x10hosting.com/blog/?cat=9
2001 Jeep Cherokee 4.0 L Limited, White. Bought in Grangeville, ID 06/11/08. Stock everything.
1998 Jeep Wrangle 4.0 L, Green. Bought in Nampa, ID 02/21/09
1988 Jeep Cherokee 4.0 L, White. Bought in Vancouver, WA in 2003. 1st Jeep, White. Bought with 3" lift, added Pacesetter header and 40 series Flowmaster
myriad360 is offline  
post #13 of 18 Old 09-21-2008, 06:05 PM
MoJeeper
Registered User
2009 JK Wrangler 
 
Join Date: Jun 2006
Location: Northeast Missouri
Posts: 716
It maybe a farmer thing, but we use pepper in our coolant systems if were in a pinch and have a leak..Its work very well.

09 JKU Sahara
MoJeeper is offline  
post #14 of 18 Old 09-21-2008, 09:12 PM
LJameson
Registered User
1990 YJ Wrangler 
 
Join Date: Jun 2008
Location: Central Oregon!
Posts: 3,829
Quote:
Originally Posted by MoJeeper View Post
It maybe a farmer thing, but we use pepper in our coolant systems if were in a pinch and have a leak..Its work very well.
I've heard of something like that, but with cracking an egg in your radiator.

1990 YJ-The wheeler
2015 JK- The DD
LJameson is offline  
post #15 of 18 Old 09-21-2008, 10:16 PM
Tom Hartz
Registered User
1967 CJ5 
 
Join Date: Oct 2005
Location: Santa Clarita, Ca.
Posts: 442
Pepper does work, I have done it.

Tom
Tom Hartz is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
heater core leaking ? RichRichards TJ Wrangler Technical Forum 3 02-09-2010 10:22 PM
Possible Heater Core Leaking HanksRide YJ Wrangler Technical Forum 7 02-17-2009 06:49 PM
Heater core leaking AFTER new one installed! Lovemyyj YJ Wrangler Technical Forum 4 06-02-2008 01:04 PM
heater core leaking Tuff350ss TJ Wrangler Technical Forum 1 11-12-2007 10:27 AM
Heater core leaking on my TJ! DCGayhart TJ Wrangler Technical Forum 3 10-16-2006 08:34 PM

Posting Rules  
You may post new threads
You may 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 On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome