International Full Size Jeep Association

International Full Size Jeep Association (
-   Engine (
-   -   long awaitied electric fan conversion... (

youngjeeper 04-20-2004 09:12 AM

Wag Electric Fan Conversion

We have done two electric fan conversions, one was on my 88' (mech. fan went through radiator :eek: ) and one on my dads choptop.

*Donor Vehicles*
~95-99 Plymouth Voyager (Dodge Caravan, Chrysler Town and Country) year 1995 was a changing year, so some have this fan, some don’t, so take a tape measure.

~80's Chrysler New Yorker

*Background Info*
- The Plymouth fan i run on my 88' gw (daily driver). this fan requires *some* trimming to the shroud. we had to trim the top of the shroud and the corners to fit it on the radiator. this fan is run on a stock alternator, and so far has kept the jeep nice and cool -on and off road.

- The New Yorker fan is an *exact* fit. i think we MAY of taken the dremel tool to a couple edges to push it against the radiator a little better. not sure if this fan will run on stock alternator, as in the choptop we have a hi-output alternator. NOTE: this fan as of now, is UNTESTED. we have wired it up and turned it on and it seems to have sufficient air flow, but as of now, the choptop is sitting in the garage.

- Remove all hoses from radiator, and unbolt the radiator from the valance w/ the mounts on, set aside.
- Remove mechanical fan and the double sided bolts that attach to the pulley.
- When double sided bolts are out, insert in a bolt with a flat head into the pulley (gets more clearance).
- With the radiator on a table, set the new fan and shroud against the inner side of the radiator.
- You want the fan to fit flush with the "fins" on the radiator, so do the necessary trimming on the shrouds corners, tops, etc. *NOTE* on the Plymouth fan the shroud should need trimming along the top and corners, and on the bottom where one of the hose necks are.
- Once it the fan sits flush, your going to want it attached securely to the radiator. Drill holes through the side radiator mounts (that hold it to the valance) and into the shroud. We used long bolts and nuts to fasten the fan to the mounts.

Reinstall the radiator/fan and wire according to following wiring diagram: (will post in a few along with pics)

[ April 20, 2004, 03:13 PM: Message edited by: youngjeeper ]

youngjeeper 04-20-2004 09:18 AM


pics soon..

[ April 20, 2004, 03:21 PM: Message edited by: youngjeeper ]

J10Mike 04-20-2004 01:08 PM

very nice write up. i may be looking into going electric soon. good job

Merc69 04-20-2004 01:21 PM

Thanks to you Dan and your dad. Off to the junk yard tomorrow. Can't wait to see the pics.

Slim 04-20-2004 06:16 PM

awesum job guy ,,,,,i have a nice Chyrsler double fan set up i was lookin last weekend at installing,,,,,,,,,

Perfect timing

sloop 04-21-2004 03:18 AM

nice write up. i have one question: why do you want the fan to always come on whenever the A/C is engaged?

jode 04-21-2004 04:43 AM

If I may,
AC uses a chemical (somewhat akin to your radiator coolant) flowing through a system (somewhat akin to your engine’s cooling system) which must be cooled in a set of fins (somewhat akin to your radiator) in order to work. AC doesn’t bring cold in, it transfers the heat from the interior of your rig to the exterior where the fan is used to blow “cool” outside air over the fins of the AC system so that the heat that your AC system just brought to the exterior doesn’t get brought right back into the interior as it cycles through the system. If the fan weren’t on when the AC was on, your AC would only work when you were hauling booty down the freeway. Clear as mud?

roadgrime 04-21-2004 05:34 AM

additionally the ac being on causes an increase in load to the engine(which causes the temp to rise). having the fan come on with the ac helps ofset this load (or heat increase)

youngjeeper 04-21-2004 09:46 AM

yea the fan comes on w/ac b.c it makes the temperature rise

Brad W. 04-21-2004 05:24 PM

i've got a fan from a 90's grand am. it is fairly small, and i *think* there is enough room to mount it next to the aux. trans cooler. i'll let you know how it goes.

TimK 04-21-2004 05:51 PM

Has anyone put an electric fan on a I6 258?
I imagine that the double fan dodge minivan or new yorker fits the 360's and not the 258's...

youngjeeper 04-21-2004 10:40 PM

oh yes good point, i do have a 360 engine, which has a bigger radiator then a 258. i guess if you have a 258, just goto the junkyard with a tape can still use my wiring diagram/directions. i was actually luckey enough to find a GW radiator at the junkyard to compare my fans too

i also need to add the plymouth fan, is a SINGLE large fan, w/shroud covering around it, the new yorker fan is a dual fan setup

[ April 22, 2004, 04:41 AM: Message edited by: youngjeeper ]

Max Power 04-22-2004 12:35 AM

I did a dual fan conversion, worked fine, but if I still had a/c, I might consider adding a third pusher fan in front of the a/c condenser. Mercedes does it like that.

HeepofaJeep 04-22-2004 01:24 AM

If you have a 258, I know for a fact a tuarus electric fan out of a car with a 3.8 engine will work perfect. It is two speed and readily has enough power to use as a primary fan

It is a rather "trendy" swap on Pirate 4x4 right now.

I have not tried it in a fsj, but in a cj, and if I can fit it in my CJ, where I have less than 5 inches between the water pump pulley and the radiator, I know you can fit it in a FSJ.

TimK 04-22-2004 02:16 AM

thanks for the reference guys!

Heep - I'll be back in the area soon.
I might try to make it up for the pnw get together upcomming next saturday... (just for the morning -I've got to go to Ohio the next day)

SJ 04-22-2004 02:30 AM

Why is an electric fan conversion necessary? Is it a much more efficient way to cool? I live and 4 wheel in the desert so any upgrade to my cooling system would be great.

I am considering a body lift so I was thinking that I wouldn't have to relocate the radiater if I did the conversion, right?

Zorm 04-22-2004 02:52 AM

HeepofaJeep, I have that same fan (from the tuarus) but I was told that it draws at least 100 amps at startup then runs at 35 amps. Since my stock alt is only about 60-70 amps I need to find another alt.
Anyone want to chime in with what the Grand Wags (with 360) stick alt is rated at?

youngjeeper 04-22-2004 08:46 AM

SJ, i run electric b.c i never wanna go through what i went through the first time again. i broke a motor mount and the mechanical fan went through the radiator, i was 7 hours from be electrical is more covienient too, you can turn it on whenever you want and turn it off too. also when you turn your jeep off you can keep the fan running for extra cooling.

FSJ Thing 04-22-2004 10:16 AM

Thanks Youngjeeper. I was thinking of ordering an electric fan from summit, but with your info I may be able to save some cash for otherthings! ;)

Sycho15 04-23-2004 01:02 AM

The biggest advantage of an electric fan is the ability to turn it off when crossing deep water. The water will do the work of keeping the engine cool, and the fan won't get pulled into the radiator and shred it.

All times are GMT -6. The time now is 07:19 AM.

Powered by vBulletin Version 3.5.4
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.