Heater fan upgrade in the NAS D-90???? - Defender Source
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  #1  
Old July 7th, 2012, 11:13 PM
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Dr. Martin Ferrillo
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Heater fan upgrade in the NAS D-90????

Has anybody upgraded there heater fan? I use my 1995 d90 as a winter car in upstate NY and although my engine temp is up to normal operating temp in 5 minutes, my cabin temp stays abysmally cold due to lack of heat output. My defender even has an arctic heater too under the passenger seat but that works poorly in conjunction. I recently found a heater fan upgrade for my classic MGB and I thought that there might be a similar upgrade available for a defender???
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  #2  
Old July 7th, 2012, 11:40 PM
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Jeff Labbé
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Seems like you already have the upgrade (artic heater

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------ Follow up post added July 7th, 2012 11:44 PM ------

Quote:
Originally Posted by CDNRover
Seems like you already have the upgrade (artic heater). I thought V8 gave enough heat to warm up the interior? A partly block heater matrix? Blocked duct? Do you feel air coming out of the vents? If so it's only cool air? If your system is tip top and ain't enough to suit you then, try webasto cab heater. It'll fry your buns in there!

Cheers

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  #3  
Old July 7th, 2012, 11:59 PM
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drop curtain
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  #4  
Old July 8th, 2012, 08:23 AM
Doc Martin
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Dr. Martin Ferrillo
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The heater blower motor needs to move more air. The arctic heater is equally weak at moving air and warming up the cabin.
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  #5  
Old July 8th, 2012, 12:05 PM
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Russell
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The PO in Wyoming installed in my NAS ST what I understand is a GM truck blower motor that is a straight drop in. It blows hard and can maintain the interior at 70 during the winter. Badger softtop probably helps here as well. Let me know if you need the part number of the blower -- or search the threads. The part number is listed in here some where.
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  #6  
Old July 8th, 2012, 12:52 PM
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Chris Snyder
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I've always wondered this as, even with the modifications to the bulkhead, the output of that fan/motor is truely abysmal.

I'd love that part number.
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  #7  
Old July 8th, 2012, 09:23 PM
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Jason Lavender
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Quote:
Originally Posted by cellulararrest View Post
I've always wondered this as, even with the modifications to the bulkhead, the output of that fan/motor is truely abysmal.

I'd love that part number.
Put me on that list too! I don't even think mine works so probably needs to be replaced anyhow.
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  #8  
Old July 9th, 2012, 12:09 AM
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Mine died this week.. I could use that info as well... Thanks.

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  #9  
Old July 9th, 2012, 05:00 AM
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I'm puzzled to since the heater matrix is bigger than the unit in Ford's expedition and alike.
RN's Mansfield unit does wonders for series trucks
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  #10  
Old July 9th, 2012, 08:14 AM
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Quote:
Originally Posted by down_shift View Post
The PO in Wyoming installed in my NAS ST what I understand is a GM truck blower motor that is a straight drop in. It blows hard and can maintain the interior at 70 during the winter. Badger softtop probably helps here as well. Let me know if you need the part number of the blower -- or search the threads. The part number is listed in here some where.
I could use that part number, my fan doesn't work when temps are below 30* or so.
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  #11  
Old July 9th, 2012, 08:28 AM
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Would love it as well, mine is halfway out anyway.
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  #12  
Old July 9th, 2012, 09:47 AM
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http://www.defendersource.com/forum/...74&postcount=3

Until I can get under my hood, here is a starting point.
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  #13  
Old July 9th, 2012, 09:49 AM
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From a thread over on Guns and Rovers, the part number is PM136 and can be found here:
http://www.autozone.com/autozone/par...ier=15918_0_0_

thread link:
http://siteground237.com/~gunsandr/s...d-Heater/page2

looks like a pretty simple swap with a little cutting needed but the blower is cheap!
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  #14  
Old July 9th, 2012, 09:52 AM
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Bingo: http://www.defendersource.com/forum/...1&postcount=12

Napa G.M. blower motor # M-4722 or GM 14-8154-4
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  #15  
Old July 9th, 2012, 09:59 AM
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Another decent thread on the actual install...this guy actually put the LR cage on the GM blower motor to avoid some of the other modifications

http://www.tukojack.com/livelearnrur4.htm
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  #16  
Old July 9th, 2012, 12:46 PM
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I think you already have the easy solution to your fan upgrade - the MG unit.!
the MG blower from memory has a bigger- longer fan, I think this will fit in the heater assembly on your 90.

there are also lots of threads on here about sorting out the air leaks in the heater assy which allow the blown air to bypass the heater matrix.

There is also a thicker heater matrix available from bearmach p# ba2370 & BA2380.

the links to the GM Mod on tuko jacks website are for series 3 heater assembly's not 90/110.

regards

Gren
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  #17  
Old July 9th, 2012, 12:56 PM
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Quote:
Originally Posted by Gren_T View Post
I think you already have the easy solution to your fan upgrade - the MG unit.!
the MG blower from memory has a bigger- longer fan, I think this will fit in the heater assembly on your 90.

there are also lots of threads on here about sorting out the air leaks in the heater assy which allow the blown air to bypass the heater matrix.

There is also a thicker heater matrix available from bearmach p# ba2370 & BA2380.

the links to the GM Mod on tuko jacks website are for series 3 heater assembly's not 90/110.

regards

Gren
Thanks for the correction on the Tuko link and you are correct...I found the link in another thread but didn't verify the vehicle before posting here.
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  #18  
Old July 9th, 2012, 03:55 PM
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Todd Kendrick
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The biggest upgrade I did to my heater was to put on SW doors; I even stopped using the drop curtain after that so if anyone needs a drop curtain..............SW doors =- huge improvement! It gets really cold (routinely below zero) here as well..............
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  #19  
Old July 9th, 2012, 03:55 PM
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William Skidmore
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Yeah I used that write up as a basis for what I'm trying to do to mine. He had to fab up a spacer between the motor and the blower housing. I'm working on a S3 truck. Trying to find a fan that has enough of an offset so that there is no need for a spacer between the motor and housing.

Quote:
Originally Posted by jefhuf View Post
Thanks for the correction on the Tuko link and you are correct...I found the link in another thread but didn't verify the vehicle before posting here.
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  #20  
Old July 9th, 2012, 09:32 PM
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My diesel will bake you out. But have heard the gas motors do not do as well with the heat. Have you tried a scoop intake on the fender to draw in more air.
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