I'd have to agree with Cody. Not based on my direct experience owning a 4.7 but just what I've read over months & months of WJ research. Keep up with oil changes & just some basic common sense like stop driving when the temp gauge goes higher than normal. Apparently the aluminum heads are prone to warping pretty quickly when temps rise.

I had a WJ 4.0 and miss it terribly. But this time around I'm going for the 4.7. The extra power on tap is VERY nice to have. My dad has an 02 I might end up with