4.0L Head Swap on a Jeep 258 4.2L Engine
![4.0L Head Swap on a Jeep 258 4.2L Engine](https://www.motortrend.com/uploads/sites/3/2020/03/01-4-0l-head-swap-on-a-jeep.jpg?fit=around%7C875:492)
What you need to install a HO 4.0L cylinder head on your older Jeep inline-six engine.
Parking Lot Engine Problems at 2016 Moab Easter Jeep Safari
4.0L Head- 4.2L Block Water Jackets Explained
![](http://images.tapatalk-cdn.com/15/08/27/c92afcc6377b0816d4d61cde61b63f4b.jpg)
4.0 head and EFI on a 4.2 block - Page 11 - Jeep Strokers
Newbie CJ Owner with 4.2L/4.0L Concern
4.0 Head Swap on 4.2L 258, Page 2
![](https://www.jeeptech.com/engine/258.jpg)
Jeep Engine: AMC 258 I6
Is this a rebuild or replacement engine?
![](https://i.ytimg.com/vi/Rj2FanGPXBA/hqdefault.jpg)
Jeep 258 Cylinder Head Performance Modifications, Project Updates
![](https://d128gh3mzd2g7y.cloudfront.net/0_v2veb0x6.mp4/Thumbnails/0_v2veb0x6.0000002.jpg)
4.0L Head Swap on a Jeep 258 4.2L Engine
![](https://www.advanceadapters.com/images/thumbs/0003835_ax15-jeep-40-bh-kit-external-hydupgrade-89-93_625.png)
AX15 - JEEP 4.0 B.H. KIT EXTERNAL HYD.UPGRADE 89-93 - Advance Adapters
![](https://i.ytimg.com/vi/22YJcT_0fhM/maxresdefault.jpg)
Jeep 4L Head Swap on a 4.2L (258)
![](https://cimg7.ibsrv.net/gimg/www.cherokeeforum.com-vbulletin/1024x576/36_4735136352ce4641423ca87e8a061cffccb3183b.jpg)
2.5 to 4.2 engine swap - Jeep Cherokee Forum