4.0 swap question - JeepForum.com

 
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post #1 of 5 Old 07-04-2013, 12:43 PM Thread Starter
copauls863
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1982 CJ7 
 
Join Date: Mar 2009
Location: Winslow
Posts: 122
4.0 swap question

I have already had the 4.0 in for a while, and it's great... i have the contour fan swap... i am looking to swap this thing back to a clutch fan... thing is idk what to get them off... on the 4.0 it had one of those off set fans... that wont work... the old 4.2 fan won't work either basically im gonna need a new clutch and fan that will bolt up to my water pump. . .. any thoughts/ suggestions?

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post #2 of 5 Old 07-04-2013, 07:18 PM
only in a jeep cj
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First off, why the swap out from the contour fan? Does it not work, too noisy?
To use a fan clutch, I think the CJ uses a larger 7 blade fan and the Wrangler uses a smaller 5 blade. The radiator will have side brackets that are set further out so the body of the radiator is deeper in the grill. These are usually HD 2 core versions with the fill cap offset to one side. You will also need the shroud as well.

You can also do the fixed fan that is 4 blade, has a small spacer and no shroud . That radiator is a center cap and sits closer to the fan.

Ed
1975 CJ-6 1983 CJ-8
1986 CJ-7 Laredo 1986 TJ-7 Trail Jeep
2003 Inca Gold TJ Rubicon
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post #3 of 5 Old 07-04-2013, 07:31 PM Thread Starter
copauls863
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1982 CJ7 
 
Join Date: Mar 2009
Location: Winslow
Posts: 122
Honestly just don't like it. . . Burned through one already. . . So far this one has kept working but it still runs at like 220 and can keeps climbing but if I slow down to like 35 it will be fine and cool back down to 220 the only other thing I can think is something with the gauge is screwy but it seemed fine before the contour fans, so I'm just kinda guessing that's it but anyway thanks for the information my friend
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post #4 of 5 Old 07-04-2013, 07:45 PM
dan-cj7
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Make sure you know what rotation you have on the water pump. Most 4.0 with serpentine belts rotate the opposite way as the v-belts from the CJ's fan rotated.

1984 CJ7 - Under construction
4.6L stroker with MPI & AX15 with D300
OME 2.5" YJ springs
http://www.jeepforum.com/forum/f8/dans-downunder-84-cj7-build-1299387/
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post #5 of 5 Old 07-04-2013, 10:24 PM
only in a jeep cj
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Summit has a 6 blade counter clockwise fan that fits the fan clutch..I forgot the correct diameter though...17 or 19 "

Ed
1975 CJ-6 1983 CJ-8
1986 CJ-7 Laredo 1986 TJ-7 Trail Jeep
2003 Inca Gold TJ Rubicon
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