Early cj-5 heater

[tomass]

I have a 1965 CJ5 that does not have a heater, I don't think it has ever had one installed. I have been looking at the aftermarket hydro heaters out there and have only seen a couple of photos of what the install looks like. In all of these the heater motor and core were mounted inside of the jeep under the dash. I live in New England where there is a lot of moisture in the air and I think having the blower recirculating the inside air would just cause the windows to all fog up. Has anyone installed one of these heaters under the hood, or modded to pull outside air. any input or photos would be a great help.

 

[tarry99]

I have a 1965 CJ5 that does not have a heater, I don't think it has ever had one installed. I have been looking at the aftermarket hydro heaters out there and have only seen a couple of photos of what the install looks like. In all of these the heater motor and core were mounted inside of the jeep under the dash. I live in New England where there is a lot of moisture in the air and I think having the blower recirculating the inside air would just cause the windows to all fog up. Has anyone installed one of these heaters under the hood, or modded to pull outside air. any input or photos would be a great help.

The original Jeep heaters for your vehicle are quite rare but not very efficient. I know where there are two 4 sale if you had some interest in keeping it all original....
The original version would pull air from the grill and send it through a heater core mounted on the firewall and then through a fan box under the dash and finally into a defrost and heater distribution air box controlled by a vacuum to the windshield and floor. Cute but not very efficient!

The aftermarket heaters as you are referring to that Summit and others sell is just a core with a fan inside and a couple of vents......this system is fairly efficient being that it is inside the cab where it continues to re heat already warm air as compared to the old version that was trying to heat 30 degree air from the outside all the time.
The problem with the aftermarket heaters is the ability to distribute air does not exist except for two vents that point to nowhere.
I have built air boxes that mount under the dash and correct the ability to distribute heated air wherever you want it..........
As far as fogging up the inside? There are plenty of drafts and holes in a 1965 CJ5 unless you have a sealed up hard top and have done a lot of work to keep the cold out......notwithstanding the metal floors and sides.
I would doubt that you could create enough heat that it would have a fogging effect inside which brings us back to the point of being able to properly distribute the heated air to the windshield and floor to keep the glass fog free.

 

[mstar]

Here is a couple pics off heater on the '69 CJ5 when I was doing mock up.
I added plenums for defroster and a flap to redirect air to windshield.Seems to work alright but it doesn't have a top so ???

 

[73CJ]

Here is a couple pics off heater on the '69 CJ5 when I was doing mock up.
I added plenums for defroster and a flap to redirect air to windshield.Seems to work alright but it doesn't have a top so ???

Nice!

Tomass I'd look for a 72-75 heater box should bolt in.

 

[mstar]

I think that if you check with some early CJ5 guys you will find that these Mojave heaters work really good and you don't have to use junkyard parts. I have one that came in my 22' jet boat and that thing will run you out and defrosters work great as well. Just my thoughts.BTW I used the Mojave on my '69 because I wanted a "clean firewall". Probably not for everyone but it's a trailer queen.

 

[tomass]

Thanks for posting the pics, helped me visualize the size of it. I have 2 holes through the firewall that could be enlarged for the feeder hoses to mount it inside under the dash in a similar location to yours. I think I'll start there, splitting off part of it to the windshield and see how it works. my main worry is the condensation fogging the windows, but I'll cross that bridge if it becomes a problem.

 

[tarry99]

Thanks for posting the pics, helped me visualize the size of it. I have 2 holes through the firewall that could be enlarged for the feeder hoses to mount it inside under the dash in a similar location to yours. I think I'll start there, splitting off part of it to the windshield and see how it works. my main worry is the condensation fogging the windows, but I'll cross that bridge if it becomes a problem.

Tomass.......here is a few pictures of what I did.......I basically took the Summit heater and built an attached an air box to the bottom which allows me to control the defrost vent to the windshield via a cable operated valve I made and also have control over 4 cab vents .......two to the floor and two towards the cab. I have not tested it yet with heat but have tested the air flow in all ports and it should do a nice job diverting heat or recirculated air where you want it. I will also do a cable controlled water shut off valve in the engine compartment to keep hot water out of the heater core inside on Hot Days.

 

[0822]

Very nice job on the heater and duct work...