5.2 Clutch to 5.9 Electric Fan Conversion - JeepForum.com
 
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post #1 of 6 Old 01-04-2005, 11:37 AM Thread Starter
josephmartins
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5.2 Clutch to 5.9 Electric Fan Conversion

I thought I'd post the result of a conversation I just had with a local Jeep dealer.

My question was: Which factory parts do I need in order to run an electric fan assembly from a 1998 5.9L ZJ in a 1997 ZJ Ltd? [note that I asked which "factory parts" I would need.]

Naively I figured there might be some relays, a wiring harness, clips and such. Boy was I wrong.

According to the service department, I'd need the whole smash...the ECU, the complete wiring harness, relays and such from the 5.9 in order to do an OEM-like install. The ECU alone is around $800. And he guessed that the complete install would run around $2500. And he concluded by saying his shop wouldn't want to tackle the job.

Then he recommended an aftermarket variable speed electric fan wiring kit....which was my second choice anyway. I just had no idea the first option was so involved.

So anyway, all this to say that I guess I won't get my OEM install after all. But I will post a step-by-step in a month or so when I complete the conversion.

Joe Martins
Dublin, NH


Kind regards,

Joe Martins
Milford, NH

12 Wrangler Sahara JK8 conversion, <10 miles (FOR SALE, $56,700)
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00 XJ Sport, 4.0, 242, fern green on grey, 76k miles (sold)
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post #2 of 6 Old 01-04-2005, 03:36 PM
mr_user
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Do a search on "Taurus." Old Mark's and Tauruses had electric fans that bolt right into the Jeeps replacing the clutched fan. The swap is easy, and you can mount the switches anywhere. No need for new ECU or anything.

Old: '96 ZJ 4.0, 32" MT/R's, 4.5" Lift, Mickey Thompsons, JKS Disco's

New: '02 WJ Limited 4.7L, Stock for now
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post #3 of 6 Old 01-06-2005, 11:32 PM Thread Starter
josephmartins
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Thanks Matt, I'm definitely going to look into it.

Joe

Kind regards,

Joe Martins
Milford, NH

12 Wrangler Sahara JK8 conversion, <10 miles (FOR SALE, $56,700)
01 WJ Limited, 4.7, 247, black on black, 157k miles (sold)
96 XJ Classic, 4.0, 242, black on grey, 267k miles (sold)
00 XJ Sport, 4.0, 242, fern green on grey, 76k miles (sold)
90 XJ Wagoneer, 4.0, 242, burgundy on tan, unknown mileage (sold)
97 ZJ Limited, 5.2, 249, black on black, 138k miles (wrecked 12/15/05)
98 ZJ Limited, 5.2, 249, burgundy on black, 197k miles (sold)
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post #4 of 6 Old 06-28-2011, 04:09 PM
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Quote:
Originally Posted by mr_user View Post
Do a search on "Taurus." Old Mark's and Tauruses had electric fans that bolt right into the Jeeps replacing the clutched fan. The swap is easy, and you can mount the switches anywhere. No need for new ECU or anything.
I've been thinking about an e-fan swap since I got my Jeep, but was wondering about the loss of cooling to the transmission since the e-fans only kick on when the engine gets hot and I'll be driving in some rather severe arctic weather this winter. Any thoughts?
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post #5 of 6 Old 07-01-2011, 12:00 PM
Marcos
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The 5.9's e-fan is not controlled by the computer, so you wouldn't need to change that out.

Basically, you have the fan assembly itself, and then you have a series of 3 switches and 3 relays that control the high and low speeds automatically. They're all connected by a wiring harness that is assembled separately from the rest of the engine compartment wiring and then taped along side it so it looks like it's built in. The only place where it really ties into the rest of the harness is at one connector beside the fuse box that has a large wire carrying power from the battery (via a fuse in the fuse box) and a smaller wire that carries voltage when the ignition is on.

There is a switch in each radiator hose, and a tee that allows for mounting of such. And there is a special high-pressure A/C hose that has a second port for a second switch that kicks on the fan when the A/C compressor runs.

If you really wanted to add the fan, your best bet would be to find a niner to pull these pieces from. You could also build all your own from scratch if you needed to. It's a pretty simple system once you understand it.
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post #6 of 6 Old 07-01-2011, 12:26 PM
Foundrydude
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Dealers are idiots. Don't ask them about modifications and expect correct answers, unless you get lucky and find that one in a thousand parts guy. And the reason that guy knows the answer is because of what he does at home. Not because of his dealership job.

good luck with the conversion
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