Originally Posted by tomk
I think you'll end up happier with a beefy electric fan.. that will be able to cool well even at idle.
A straight mechanical fan that moves enough air at idle is going to roar at speed.
Not sure if you have ever owned a WJ they are known for burning up the Fan relays under the headlights causing an overheat.
the best is a mech and electrical fan combo.
The Mechanical fan isn't going to let you down 99% of the time. And WJ's What is MPG?
you can buy a Hummer h3 inline 5 plastic 11 blade fan also or a do a 7 blade fan.
Autozone etc sells a hayden Heavy Duty Fan clutch that stays locked over 60% of the time.
here is a link to a guide with Part #'s etc