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Unread 02-15-2014, 01:49 PM   #1
rdsk8ter
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cj7 defroster mods

I saw a post where a guy added a center defroster into a cj using a set of old vents but I cant find it now can anyone help me here? Also I am thinking it would be great to add some kind of "dash" vent that can open and close to direct air toward the passengers I was also toying with the idea of putting a small fan behind there to aid in the blowing toward the passengers. I have plenty of heat I have done the blazer mod just thinking directing the heat would be great.

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Unread 02-15-2014, 02:23 PM   #2
chet44
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Coiz did that in his build thread. Search his name, go to his profile and go to his threads. His build/restore thread should be there.

I YJ divider on the heater vent will push air toward the passenger and driver sides.
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Unread 02-15-2014, 03:10 PM   #3
Renegade82
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Ditto. Coiz's is the only one that comes to mind.
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Unread 02-15-2014, 04:51 PM   #4
hp_lovecraft
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You can pop off the pivot cover and have the effect of the vent blowing in your face.

I'd be interested in better defroster ideas. The only problem I ever have driving in snowstorms is ice building up, and lack of vision out the front.
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Unread 02-16-2014, 09:14 AM   #5
rdsk8ter
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yep coiz is who i was looking for thanks guys
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http://www.jeepforum.com/forum/f104/randys-offroad-trailer-1164102/
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Unread 02-16-2014, 01:00 PM   #6
dg6772
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I've been thinking of sealing the windshield frame to pressurize the defrost area rather than the entire frame. I'm wondering if putting a access hole in the side of the w/s frame then filling with expanded foam would do the trick.........

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Unread 02-16-2014, 01:22 PM   #7
lucdog
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Quote:
Originally Posted by dg6772
I've been thinking of sealing the windshield frame to pressurize the defrost area rather than the entire frame. I'm wondering if putting a access hole in the side of the w/s frame then filling with expanded foam would do the trick.........

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I believe in COIZs' thread he showed ( or someone else did) that there is a baffle on both sides to stop air (not 100% though)

I would be concerned expanding foam would hold and trap moisture.
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Unread 02-16-2014, 02:13 PM   #8
dg6772
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Does that hold true to the aftermarket w/s frame as well? I guess I should have looked,I just assumed there was nothing.

I'm going through his thread now,to see what he did.....

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Unread 02-16-2014, 02:20 PM   #9
chet44
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Quote:
Originally Posted by dg6772
I've been thinking of sealing the windshield frame to pressurize the defrost area rather than the entire frame. I'm wondering if putting a access hole in the side of the w/s frame then filling with expanded foam would do the trick.........

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I did that to mine, but I have a fiberglass windshield frame. I wouldn't do it to a steel one. Just my .02 cents.
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Unread 02-16-2014, 02:32 PM   #10
dg6772
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Yea,after some thought,I think I'll look for a different route.

Chet,did that help? Is this worth pursuing,or should I look in a different direction all together?

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Unread 02-16-2014, 03:26 PM   #11
chet44
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It helped a lot. I did do the Blazer blower motor upgrade though. The flap that controls the air flow between heat and defrost in my heater box came off the pivot pins, so I get a mix of heat/defrost. I haven't bothered fixing it because the mix is nice for keeping the cab evenly warm, plus none of my windows or windshield frost or fog up.

Last night at work I had over an inch of snow on my windshield. After a few minutes with the blower on high, it melted all of the snow on my windshield.

When I first did it, I thought I may have screwed myself, thinking that maybe having the windshield frame being warm all around would help keep it clear. Not the case.

Technically, with the windshield frame "pressurized", you should have the same air flow out of the defrost vents. On really cold days though, I'd think you would lose a lot of the heat in that air.

Overall, I'm really happy with how it works.
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Unread 02-16-2014, 03:36 PM   #12
dg6772
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That's kinda what I was thinking. More on the line of the loss more than more pressure. I don't drive mine (generally) in the winter. I will if I have too. I would like,however,to go on some winter offroad runs.

Thanks for the input!

:2Thumbsup:

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Unread 02-16-2014, 06:34 PM   #13
chet44
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I bought mine specifically to drive in the winter. My "other" car is a Mustang GT. Doesn't do so hot in the snow. So issues like heating, defrost, starting, wipers and washer, and electrical (Battery and charging system) are pretty important.
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Unread 02-16-2014, 08:19 PM   #14
dg6772
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I can see that raising the importance level of heat and defrost just tad.

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Unread 02-17-2014, 02:45 AM   #15
John Strenk
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Yes, it'a important for me also when plowing snow.

I'd like to know how a heater system like they have in the Liberty can get so hot that the vent blowing on your arm can get so hot that it will heat your watch up untill it burns your arm.

DO they use thicker heater cores or something?

Anyone look into alternate heaters from other vehicles you can bolt in there?
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