Along the line of extra ****** coolers, radiators, and cooling in general, if you've got any friends with JK Wranglers -
This past weekend, I and my friend just south of Austin (2011 Wrangler Unlimited Sport) tried a little experiment, and discovered a dirty little secret -
The viscous fan clutches and mechanical fan blades from our KJ's - the V6 and the CRD - will bolt on (actually, screw on) a JK Wrangler 3.8 L V6 without any mods whatsoever, with plenty of clearance - their water pump shaft is already threaded for the same type fan clutch.
We used the old factory fan clutch and 5 bladed metal fan I pulled off my CRD (replaced with a Hayden severe duty clutch and V6 nylon fan) to test for fitup. And if that metal salami slicer will fit, the V6 version will be a breeze.
Matter of fact, Hayden actually lists a fan clutch on their website, for 07/08 JK's, P/N 2738. And they can order it from OReillys for $47.
Now, we're trying to figure out which one of the factory fan shrouds to order to go along with a mechanical fan - gent in Egypt on one of the JK forums has pictures of his V6 JK, with the electric fan and a mechanical fan from the factory, with a one piece factory shroud that extends back over the mechanical fan.