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 Post subject: How I Replaced my electric fan
PostPosted: Thu May 24, 2012 3:33 pm 
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Joined: Tue Jan 25, 2011 11:25 am
Posts: 105
Location: Austin, TX
My electric fan burned out this spring. I found an OEM replacement at Moparpartsamerica.com for $284 delivered. I thought this was a bit pricey so I started looking at aftermarket alternatives and found a Hayden 3814 14 inch fan that looked like it would work. This is a heavy duty, two speed, 14 inch fan similar to our OEM fan on the CRD that I thought I could make work. I pulled the fan shroud out of my CRD to have a close look and decided that there was a good chance I could retrofit this fan into the OEM fan shroud.

I ordered the Hayden 3814 from autoplicity.com for $117 delivered.

I did retrofit the existing fan shroud with this fan and installed it in my CRD. It works great but the retrofit was MUCH more difficult that I had estimated and is not one I would recommend.

The fan in the Hayden 3814 has 3 mounting lugs for the fan motor set on 120 degrees. The lugs could fit the existing OEM fan mount with the addition of some spacers. Unfortunately this fan turns the wrong direction for this retrofit and is not designed to reverse wire to reverse the motor rotation. There are lots of aftermarket fans that may work, I believe from what I have seen the single speed Hayden 14 inch fan from the same family as the 3814 will probably fit. If I were to do the job over I would have bought a Hayden 14 inch, single speed fan, removed the fan motor and blade from the Hayden shroud and retrofitted them to the existing fan shroud. The high and low speed wring in the CRD could be shorted together then the fan would operate when either a low speed or high speed fan operation is called on by the CRD. The power and ground leads could be reversed wired if needed to set the correct fan rotation. The cost would be $40 less that the solution I used.

I will walk you though my retrofit, if only to convince you that you may not want to follow the same path.

Here is the fan shroud removed from my CRD. This is the engine side of the fan.
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Now from the opposite side. This is the bumper side of the fan.
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With the fan removed. This is the engine side of the shroud.
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The OEM fan removed from the shroud. Notice the three lugs for mounting the fan
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The Hayden 3814 fan. Notice the three fan lugs (the three mounting bolts look like three white dots in the picture) on the Hayden match the OEM fan lugs. This side of the fan mounts towards the engine.
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The fan would fit inside the OEM fan shroud if I removed most of the Lugs from the Haden shroud and cut out the grill of the OEM shroud. Notice in the close up the lug has been cut down to where about 1/8 of the bolt hole in the lug is left.
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Here is the Haden 3814 mounted in the OEM fan shroud. I used some hardware supplied by Hayden and mounted the fan by drilling through the bolt lugs and the OEM shroud. This is the bumper side of the shroud with the Hayden fan with a removalable finger guard off.
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I cut the pig tail off of the OEM fan motor and soldered the connections onto the Hayden fan wires. I used liquid tape for insulation. I pulled the high and low speed relays, shorted the high speed relay then connected the ground wire (center wire on the CRD plug) and touched the high speed wire from the Hayden fan to the two wires. When the fan ran I knew I had the high speed lead from the CRD so I completed my connections.
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So far everything worked great. I then attempted to install the fan shroud and found that I had an interference with the hood latch hardware. I relieved this interference by cutting away a portion of the hardware and a portion of the Hayden fan shroud. The interference was overcome, but just barely and with more modifications than I am happy with. Here is the modified fan latch hardware and fan shroud from the bumper side. Notice the portion of the Hayden shroud and finger guard I had to remove because of the hood latch hardware interference.
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I have left out many of the details but hopefully this will be enough for you to decide if you want to go this path. If you do please PM me and we can discuss the full range of details. Its doable but after the fact I wish I had either gone with a single speed aftermarket fan and just put the fan and blade into the OEM shroud or purchased an OEM fan/shroud from mopartsamerica.

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Stone White 2005 KJ Limited CRD.
EHS, ORM, Fixed Flex Fan done.
Does EXACTLY what I expected pulling my 20 ft bass boat, chasing reds up and down the beach at North Padre Island.


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 Post subject: Re: How I Replaced my electric fan
PostPosted: Fri Jul 13, 2012 10:29 pm 
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Joined: Tue Jan 25, 2011 11:25 am
Posts: 105
Location: Austin, TX
With summer in full swing in TX the fan mod I used is continuing to work as expected. Since I have a fixed fan it does not run often but on the hottest days it will kick in. AS stated I think I would go a different way than I did if I were to do it over but this mod works just fine. Taking out the fan shroud and using a different technique for mounting the fan would be better.

_________________
Stone White 2005 KJ Limited CRD.
EHS, ORM, Fixed Flex Fan done.
Does EXACTLY what I expected pulling my 20 ft bass boat, chasing reds up and down the beach at North Padre Island.


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 Post subject: Re: How I Replaced my electric fan
PostPosted: Sat Jul 14, 2012 3:30 am 
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Joined: Tue Sep 22, 2009 10:16 pm
Posts: 3059
Location: Oxford, Connecticut
Excellent mod.

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2006 Liberty Limited CRD, Deep Beryl Green, Yeti tune, Arp studs, new cams, rockers, lifters, TB. "Green Monster"
2005 Liberty Sport CRD, Deep Beryl Green, GDE Hot Tune, ARP studs. "Rocket"
1982 Fiat 124 Spider Convertible. "Fiona"


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