Heater Hose Placement - JeepForum.com

 
LinkBack Thread Tools
post #1 of 9 Old 11-28-2006, 12:14 PM Thread Starter
StokedXJ11
Registered User
1997 XJ Cherokee 
 
Join Date: Jun 2005
Location: charleston, south carolina
Posts: 604
Heater Hose Placement

This is the directional flowing of coolant in the cooling system, taken from the 1997 XJ FSM.



Now my question/ concern is about the heater hoses. There is a upper and a lower coming out of the heater core, according to the picture the upper is the outgoing while the lower is the in going coolant flow. In the picture the upper(outgoing) hose connects respectively to the bottom of the water pump, and the lower(incoming) hose connects respectively to the upper part of the water pump. So basically they kinda crisscross. Ok now that i am done explaining to yal what you already know or can depict from the picture.

My hoses do no do this. The upper hose coming out of the heater core goes to the top of the water pump and the lower hose goes to the bottum. So why are they different from the FSM? Does anybody know which direction the coolant is flowing through those hoses? Which one is flowing in to the heater core and which one is flowing out?

Edit: Sorry that pic is a little to small ill see if i can resize it
Edit x2: There ya go its bigger and easier to see now.


Stock 1997 Jeep XJ Country
RJC #377
StokedXJ11 is offline  
Sponsored Links
Advertisement
 
post #2 of 9 Old 11-28-2006, 12:27 PM
conrasm
Registered User
 
conrasm's Avatar
2000 TJ Wrangler 
 
Join Date: Aug 2004
Location: Pittsburgh, PA
Posts: 3,808
Do you have a heater control valve? I eliminated mine and ran hoses like the diagram, but I can't remember if mine criss cross like that one. I do know that there are two sizes of hoses on mine. The t-stat and one of the heater core inlets is 3/4" while the water pump tube and the other heater core outlet are 5/8", so I just ran it that way. The direction of flow through the heater core won't matter.

Shawn
'00 TJ Sahara (RC 4" LA kit)
'06 Grand Cherokee Limited
'07 Ram 1500 quad cab

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
conrasm is offline  
post #3 of 9 Old 11-28-2006, 12:33 PM
dyna
Senior Member
 
Join Date: Oct 2006
Location: Kalifornia
Posts: 835
Without one sitting in from of me I`ll guess if you look at the H20 pump you might be able to tell which is the output side or outlet based on location of the heater output/input nipples and the impeller cavity. Yours could be switched ? One way to tell for sure is gently pull both hoses off the core and hold em up above the engine about a foot then fire it up and see which spews coolant and hook that one to the bottom of the core.
dyna is offline  
post #4 of 9 Old 11-28-2006, 12:39 PM Thread Starter
StokedXJ11
Registered User
1997 XJ Cherokee 
 
Join Date: Jun 2005
Location: charleston, south carolina
Posts: 604
Quote:
Originally Posted by conrasm
Do you have a heater control valve? I eliminated mine and ran hoses like the diagram, but I can't remember if mine criss cross like that one. I do know that there are two sizes of hoses on mine. The t-stat and one of the heater core inlets is 3/4" while the water pump tube and the other heater core outlet are 5/8", so I just ran it that way. The direction of flow through the heater core won't matter.
Heater Control Valve? Im not sure if i do or not.....

I just checked the hose that goes from my T-stat to the heater core(upper) is 11/16" not 3/4". So i am assuming that this tells me someone has done work on the cooling system of my Jeep?

With the T-stat taken out, If i were to pump water into one of the heater hoses the direction of flow doesn't matter to flush the system?

Stock 1997 Jeep XJ Country
RJC #377
StokedXJ11 is offline  
post #5 of 9 Old 11-28-2006, 01:57 PM
AZ Jeff
Web Wheeler
2014 JK Wrangler 
 
Join Date: Sep 2005
Location: San Tan Valley Arizona
Posts: 7,698
A 97 XJ does not have a heater control valve, and coolant circulates through the heater core all the time. The diagram you are shown in your manual is the correct routing for the hoses. The inlet to the heater core is the lower hose, and the outlet is the upper hose.

AZ-Jeff
I don't own an XJ any longer, but I still think they are the best of all the Jeep products ever made. My XJ was my favorite vehicle in my 50+ years of driving.
So...I stick around and give advice.
AZ Jeff is offline  
post #6 of 9 Old 09-18-2014, 04:02 PM
Tedster
Registered User
1989 YJ Wrangler 
 
Join Date: Apr 2013
Location: Laramie
Posts: 11
does anyone have the heater hoses that run through the manifold then to the heater core? having a hard time finding the hoses since the engine is an 83 in an 89 yj
Tedster is offline  
post #7 of 9 Old 09-18-2014, 05:29 PM
Paradise XJ
Registered User
1988 MJ Comanche 
 
Join Date: Jan 2007
Location: Paradise, CA
Posts: 2,425
Quote:
Originally Posted by Tedster View Post
does anyone have the heater hoses that run through the manifold then to the heater core? having a hard time finding the hoses since the engine is an 83 in an 89 yj
Got a picture...never seen a configuration like that.

1990 XJ Laredo - White & Chrome
1988 MJ Pioneer - Metallic Green and Black
Paradise XJ is offline  
post #8 of 9 Old 11-03-2014, 03:37 PM
Tedster
Registered User
1989 YJ Wrangler 
 
Join Date: Apr 2013
Location: Laramie
Posts: 11
I lol take one. Think I figured out from the manifold bolt pattern that this engine is out of a cj 5
Tedster is offline  
post #9 of 9 Old 11-03-2014, 04:35 PM
MJR
Registered User
 
MJR's Avatar
1988  
 
Join Date: Dec 2001
Location: Costa Mesa, CA
Posts: 1,083
The fittings on the heater core are two different sizes and although the service manual shows that I believe it's incorrect. The parts catalog shows upper to upper and lower to lower which is what I remember.

"Got Groceries"
88 Jeep Wagoneer
MJR 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
need help with heater hose routing around heater control valve jerry4570 XJ Cherokee Technical Forum 2 10-11-2009 12:35 PM
Heater Hose Help Ac1d XJ Cherokee Technical Forum 5 07-05-2009 08:32 PM
pre-heater hose? liamchops XJ Cherokee Technical Forum 3 02-06-2009 09:36 PM
Heater hose question BlkBird XJ Cherokee Technical Forum 1 07-17-2007 07:16 PM
vacum hose on heater? jeeptorino68 XJ Cherokee Technical Forum 1 05-18-2006 07:49 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