Blowing Steam and leaking coolant - JeepForum.com

 
LinkBack Thread Tools
post #1 of 8 Old 05-31-2005, 04:37 PM Thread Starter
Jeepsrfun
Registered User
 
Join Date: Mar 2004
Location: mobile
Posts: 90
Blowing Steam and leaking coolant

My 99 TJ is blowing steam and leaking coolant at the rear of the engine. It's right in the center of the firewall, as best I can tell. It's not at the radiator, the water pump, or where the heat exchange hoses go into the firewall.

Am I looking at a blown head gasket?


Thanks.

Jeepsrfun is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 05-31-2005, 04:57 PM Thread Starter
Jeepsrfun
Registered User
 
Join Date: Mar 2004
Location: mobile
Posts: 90
Oil looks good

Just checked the oil at the dipstick. Looks good, although it's time for a change.

Heater core maybe?


Thanks.
Jeepsrfun is offline  
post #3 of 8 Old 05-31-2005, 06:01 PM
JeepTJMan
Registered User
 
Join Date: Dec 2004
Posts: 92
HMMMM!! I'm not sure on this one. Do you have heat and A/C? Does the heat stink when you turn it on inside the jeep? Is there fluid on the floor inside of your jeep? Pictures would help alot, post some if you can.
JeepTJMan is offline  
post #4 of 8 Old 05-31-2005, 06:39 PM Thread Starter
Jeepsrfun
Registered User
 
Join Date: Mar 2004
Location: mobile
Posts: 90
Yeah, it has heat and air. Even just the vent started smelling of antifreeze, just a wiff now and then (thought it was the radiator starting to go) about a week ago. On the way home today, I heard the venting steam sound and realized it was me.

No puddling or pooling on the floorboard, although I'm going back out to look under the heater vents. Most of the steam seemed to be coming from the rear of the engine (I-6) just above the transmission hump (auto).

No hoses or anything near it, kind of a puzzler. According to the almost worthless Haynes, looks like heater core may be on other side of firewall from where I saw the steam coming from (never could get a direct look).


It is certainly a puzzle.


Thanks


Quote:
Originally Posted by JeepTJMan
HMMMM!! I'm not sure on this one. Do you have heat and A/C? Does the heat stink when you turn it on inside the jeep? Is there fluid on the floor inside of your jeep? Pictures would help alot, post some if you can.
Jeepsrfun is offline  
post #5 of 8 Old 05-31-2005, 06:55 PM Thread Starter
Jeepsrfun
Registered User
 
Join Date: Mar 2004
Location: mobile
Posts: 90
I think I may have spotted where it was venting through the firewall. It seems the defroster duct comes through the firewall and runs through the engine compartment (if I understood what I was looking at).

I think the blow through was coming through at the bottom of the duct.

Anybody know a good place to get a heater core, or just go OEM?


Thanks.
Jeepsrfun is offline  
post #6 of 8 Old 05-31-2005, 07:54 PM Thread Starter
Jeepsrfun
Registered User
 
Join Date: Mar 2004
Location: mobile
Posts: 90
Theory of what it is.

Check this theory. The duct is from the outside air vent (at back of hood).

I had the air mix control (hot/cold for heater and A/C) set all the way to cold, so damper should have been full closed. Heater Core blew, pressuring up the chamber where the outside air and heater core air mix. Pressure may have sealed damper even tighter (don't know, kinda all depends on which way it swings). Pressure had to go somewhere, so it blew out around the outside air duct.

Least that's what I'm hoping, since it's only a heater core and not a head gasket. Just luck that I didn't get sprayed with antifreeze or at least dripped upon.


Thanks
Jeepsrfun is offline  
post #7 of 8 Old 07-13-2010, 04:50 PM
billyzxcv
Registered User
 
Join Date: Jul 2010
Location: kentucky
Posts: 2
Solution?

Was replacing the heater core the solution to your problem? I have encountered the exact same problem with a 2000 TJ 4 cylinder.

If so, what is the level of difficulty replacing the heater core?
billyzxcv is offline  
post #8 of 8 Old 07-13-2010, 05:05 PM
wushaw
Rockin jeep
 
wushaw's Avatar
2000 TJ Wrangler 
 
Join Date: Jan 2007
Location: Texas
Posts: 8,165
Disconnect Battery, drain freon with approved methods (or the freon police will get ya) disconnect a/c from evaporator, disconnect heater core lines, remove steering column ( secure wheel from spinning due to clock spring) remove dash, remove HVAC box, remove heater core, Re-install what you just tore apart, fill radiator, service AC.
Sounds easy doesn't take a wekend & take your time.
Here is what it it looks like with dash removedhttp

Last edited by wushaw; 07-13-2010 at 05:53 PM.
wushaw is offline  
Reply

Tags
anti freeze , anti-freeze , coolant , head gasket , heater core , leak

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 stopped blowing hot after a coolant overhaul STW TJ Wrangler Technical Forum 11 12-13-2009 07:32 AM
Still leaking Coolant. HELP! bleep Wrangler General Discussion 3 12-10-2009 09:14 AM
Leaking Coolant eabbs TJ Wrangler Technical Forum 7 11-18-2006 10:57 PM
steam + coolant spouting out from upper radiator hose farinspace TJ Wrangler Technical Forum 7 02-12-2006 03:24 PM
Leaking coolant Nymisus YJ Wrangler Technical Forum 7 08-15-2003 02:25 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