Jeep heater / cowl vent - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 01-08-2002, 09:55 AM Thread Starter
Join Date: Nov 2000
Posts: 2,687
Thanks: 0
Thanked 0 Times in 0 Posts
Jeep heater / cowl vent

If the cowl vent is closed so that the heater draws interior air (recirculate) where does the heater draw that air in from? Which cable or flap closes the cowl vent and opens it to the interior?


84 CJ7, 258, HEI, M/C 2100 carb, 5 inch lift, RS9000's, 33x12.5 BFG M/T's, 4.56's and Detroit softlocker, full cage & belts, Xenon flares, Dana 44 rear, GM dual diaphragm brake booster
TiminMb is offline  
Sponsored Links
post #2 of (permalink) Old 01-08-2002, 10:28 AM
Old Hand
Drury's Avatar
Join Date: Sep 2001
Location: Austin, TX
Posts: 745
Thanks: 0
Thanked 0 Times in 0 Posts
Re: Jeep heater / cowl vent

Jeeps have heat??? ; ) Sorry just couldn't resist.

78 CJ7 Golden Eagle/TR Ignition/Weberized/2" leafs
Drury is offline  
post #3 of (permalink) Old 01-08-2002, 12:04 PM
Join Date: Sep 1999
Posts: 586
Thanks: 0
Thanked 0 Times in 0 Posts
Re: Jeep heater / cowl vent

The heater will not get any outside air nor any directly inside. Sorta creates a vaccum and uses the air inside by sucking air back in the vent outlets, through any loose fitting connections or screw hole. Not very effectively. If you look through the cowl grill on top of the tub you can see the vent flap on the passenger side. One cable opens/closes the vent, the other puts the defrost on and off. Look through the cowl hole and have someone push and pull the cables. When I went to a fiber tub I didn't even bother to cut the hole for the heater or connect the hose. I just let the heater use the air in the Jeep. Actually make the word "heater" almost true.

76 CJ5
Pigpen is offline  
Sponsored Links
post #4 of (permalink) Old 01-08-2002, 01:51 PM
Join Date: Nov 2000
Location: newly relocated to Huntsville, AL
Posts: 845
Thanks: 0
Thanked 0 Times in 0 Posts
Re: Jeep heater / cowl vent

if you close up the vent, it will burn up the heater motor eventually. and as discussed a few days ago, if you make the air just recirculate from inside the cab, it will gather too much moisture.


The cup isn't half full or half empty, it's just twice the size it needs to be!!!
80cj is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

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


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

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 On
Pingbacks are On
Refbacks are On

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