1. Home
  2. Jeep and Willys (new and old)
  3. where to get info on 4.2 to 4.0L swap

where to get info on 4.2 to 4.0L swap

Where can I get info, articles, etc, about replacing the old 4.2 with the newer 4.0L H.O.? I am planning on doing this on my 89 YJ.. Does anyone have a good complete 4.0 H.0. for sale, somewhere near ontario, Canada?

Thanks for your help..

Miguel

89YJ 93YJ
Reply to
Miguel Londono
Loading thread data ...
4WD & Sports Utility Magazine, Vol 20 #10, Oct 2004, pg 43 has a little quickie article which may be a good place to start.

I am getting closer each day to having to make a decision for my sons '89YJ. I continue to change my mind about once/week between Chevy 350 Stroker

4.0 just rebuild the old 4.2

I keep thinking that a 350 would not cost much more to put in than a stroker or even a 4.0 - have more power & probably give @ least, the same if not better, fuel mileage.

Reply to
Carlo

formatting link

Reply to
William Oliveri

Get a stock chevy 350 V8 with a transmission. I know of a person who did this long ago and he could do wheelie's! Not much more money to do as you have to do your engine and trasmission anyway and you might get some of your money back if you ever sell it.

Reply to
Brian

Thanks everyone for the info, for anyone else interested here are the links I found with info on changing the 4.2 to the newer 4.0 engine in a YJ:

formatting link
I am still looking for a complete 4.0 for the upgrade, the idea of the 350 in a jeep does not fit into what I want. I am looking for better mileage and more reliability. the 4.0 has more than enough power for what it is....

Miguel

89YJ low output 93YJ H.O.

Reply to
Miguel Londono

MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.