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Unread 07-04-2013, 01:43 PM   #1
copauls863
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1982 CJ7 
 
Join Date: Mar 2009
Location: Winslow, Arizona
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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Unread 07-04-2013, 08:18 PM   #2
only in a jeep cj
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1986 CJ7 
 
Join Date: Jun 2001
Location: Mobile, Alabama
Posts: 4,201
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.
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1975 CJ-6 304 T15 Dana20 30/44 3.73
1983 CJ-8 258 T5 300 30/44 3.31 Looking for full or half hardtop buy or trade
1986 CJ-7 Laredo 4.6 stroker T5 300 30/44 3.31
1986 TJ-7 Trail Jeep project in the works
2003 Inca Gold TJ Rubicon
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Unread 07-04-2013, 08:31 PM   #3
copauls863
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1982 CJ7 
 
Join Date: Mar 2009
Location: Winslow, Arizona
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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Unread 07-04-2013, 08:45 PM   #4
dan-cj7
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1984 CJ7 
 
Join Date: May 2011
Location: , Australia
Posts: 150
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.
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1984 CJ7 - Under construction
4.6L stroker with MPI & AX15 with D300
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http://www.jeepforum.com/forum/f8/dans-downunder-84-cj7-build-1299387/
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Unread 07-04-2013, 11:24 PM   #5
only in a jeep cj
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1986 CJ7 
 
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Location: Mobile, Alabama
Posts: 4,201
Summit has a 6 blade counter clockwise fan that fits the fan clutch..I forgot the correct diameter though...17 or 19 "
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Ed

1975 CJ-6 304 T15 Dana20 30/44 3.73
1983 CJ-8 258 T5 300 30/44 3.31 Looking for full or half hardtop buy or trade
1986 CJ-7 Laredo 4.6 stroker T5 300 30/44 3.31
1986 TJ-7 Trail Jeep project in the works
2003 Inca Gold TJ Rubicon
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