I have a 91 4.0 ohv 5spd, will a 4.0 sohc fit in? Is the bell housing pattern the same?

 

do a little searching there is a great thread about this

 

Will it fit? Yeh but your going to have to change everything Engine, Wiring, ECU , Trans and also you would be going from obd1 to obd2 and would probally have to eliminate pats on the SOHC motor ECU

 

i would just stick with the old school ohv 4.0 their tuff motors lots of bottom end grunt. the new ones dont have that

 

^^^ agree i have 273k on my orginal motor and i beat the **** out of it

 

Thanks, I figured the cammer would ba a bit better, but I guess you cant beat the old stuff even 6 cyls. Besides I am new to this v6 stuff. This is why i have an F150 with a 302, a proven reliable motor.

 

it doesnt im pretty sure i could be wrong but i did the swap and couldnt be any more happier and the sohc has pretty decent torque, the ohv's tq is 225 at 2700 rpms, and the sohc is 235 at 3000. how much diff. is that? all i gotta say is 160 hp is bull! ohv is reliable but a BORING motor! https://www.ranger-forums.com/f33/4-...0l-sohc-93309/ although it might not work because of the obd 1 and obd 2 changes my dad made it work in his truck but it runs a lil rough sometimes.

 

Wrong, the OHV 4.0 is tough but it has very little that the SOHC 4.0 doesn't have. That very little is; 4 (or less) lb-ft more torque at rpms under 1500. That is less than 2% difference. Otherwise, the SOHC is superior in performance. Durability of the SOHC 4.0 seems to be good but the added complexity of the cam drive leave it suspect to failure before the OHV.

 

all im saying if you want a sohc motor go get ya one.. im a old school guy and i hate the new 4.0s with passon their such a nightmare when it comes to working on it. ive rebuilt a few due to em timeing chain isues they had. but i will never own one.

 

well the ohv has its flaws as well lol, a sh!tty rear main seal and poor oil circulation in the heads so pick your poison..

 

yes it does i will say that ive alredy had the head problem at number 4 cyl.. and yes the old 4.0 tick only does it when the oil needs changed lol. but any motor has flaws none is perfect

 

mine ticked like a clock on speed but ran great tho lol. and the upper intake gasket goes out on them alot.