Join Date: Mar 2002
Location: Crestview, Florida
I'm not knocking the post-1990 (4.0 liter) jeeps, but I've got a 1985 CJ-7 and 1990 Wrangler, both with the 258 I-6 and I would definitely recommend this engine setup. Any maintenance (other than perhaps the AC unit) is easily done with a set of normal tools, and parts are reasonably priced (replaced a water pump on the '85 yesterday for $30 from Autozone). The 1990 has 130,000 miles and it burns less than 1/2 quart of oil between changes (never been rebuilt or anything). These engines do have a pseudo-computer, but it is quite simple compared to what I understand operates the fuel-injection unit in the 1991-and-up 4.0 liter. In fairness though, that 4.0 does have the advantage in both horsepower and fuel economy, so it's your call. Hope this helps!
Currently an '86 CJ-7 and a '77 CJ-7 Golden Eagle---#4 and 5 following a '01 Sahara, '90 Sahara, and '85 CJ-7....