How are Ford cylinder heads and valvetrain interchange?
You can use the social sharing buttons to the left, or copy and paste the website link: https://www.diyford.com/ford-cylinder-heads-valvetrain-interchange-small-block/ The 221 cylinder head is identifiable at a glance by observing its small kidneyshaped 45- to 51-cc combustion chambers along with 1.59/1.39-inch intake/exhaust valves.
What to look for in a small block Ford cylinder head?
Small-block Ford cylinder-head identification is straightforward if you know what to look for. In time, it becomes second nature. The most important clues are Ford casting numbers and date codes, and understanding the difference between a casting number and part number. Rarely are the two ever the same.
Can a 4.0L Jeep motor fit a pre 05?
No, the bosses in the blocks are different in the 99-04 WJ and the 00+ TJs compared to XJ/ZJ/YJ/early TJ, that’s why they won’t bolt in. Technically, you can make them work with some fab work, but it’s not like 4.0s in the correct arrangement are hard to come by. Can the OPDA TJ’s from 05/06 swap into a pre 05?
How big is a 289 High Performance cylinder head?
The 289 High Performance cylinder head isn’t what a lot of folks think it is. Port and valve size is the same as a 2V/4V head with 1.78/1.45-inch valves and 1.94 x 1.04-inch intake and 1.24 x 1.00-inch exhaust ports. Where the Hi-Po head differs is valvespring pockets and screw-in rocker-arm studs for better stability at high RPM.
Is it good to swap head on 4.2L engine?
The head swap was the best mod I made to the 4.2L as far as performance gains. Fuel injection will add driveability and reliability on the trails especially. Being in Cali, there are a few things to keep in mind, if you swap to a newer Jeep fuel injection system then to smog requires a BAR referee certification the first time.
Can a 4.2L block be blocked off?
Some 4.2L blocks have a larger head mating surface, to where the coolant passages do not need to be blocked, i wasn’t that lucky. It is a good idea to check before you block them off. the powersteering bracket required clearancing at top of bracket where it bolts to intake manifold.
You can use the social sharing buttons to the left, or copy and paste the website link: https://www.diyford.com/ford-cylinder-heads-valvetrain-interchange-small-block/ The 221 cylinder head is identifiable at a glance by observing its small kidneyshaped 45- to 51-cc combustion chambers along with 1.59/1.39-inch intake/exhaust valves.
What’s the casting number on a 4.0 engine?
The head has the 7120 casting number, which still has the temp sensor in rear of the head. Some notes for reference: make sure to get the pushrods and rockers from donor engine, the pushrods are shorter on the 4.0 head than the 4.2.