summit700

i have a1991 cherokee 4.0l that currently has a 1997 engine in it.. I believe the engines on the way out and would like to swap it.. What years of cherokee engines am i able to get the donor engine and also what other engine related aparts shoud i be taking with the new engine..also my jeep is manual transmission if that makes a difference.. any help would be great.

djb383

There will be motor swap experts posting shortly I'm sure. I didn't think a '97 up head was drilled/tapped for the '96 down temp gauge sending unit. Was your temp gauge hooked up?

DFlintstone

I'm not claiming to be an expert, but I think anything from 87 all the way up until they went to coil packs sometime in 99 can go OK. You will want the sensors and stuff that match your 91 PCM....and the torque-plate as well, for sure on a 90 or earlier, no idea there on the later. I suppose Cruisers Ho > Renix swap info found in my signature might apply in reverse putting a < 91 in an OBDI HO.

Like DJB says, your original temp sender was on the rear of the head, then moved to the t-stat housing later.

summit700

The temp gauge does work. Not 100% sure the engine is a 97 the previous owner told me that's what it is. Not sure how to tell its year. This maybe a issue lol. Is there a way to tell what year the engine is?

cruiser54

Get this number:

DFlintstone

Then check here with that # > http://www.jeep4.0performance.4mg.com/tech_specs.html

summit700

Ok maybe I'm just havin a dumb moment but the number I get is 106mx24. Does that sound like a number I got it from the spot on the engine ur pic shows but I don't c any numbers like that on the link

cruiser54

Wrong link.

Your engine was built on june 24th, 1991

http://www.justanswer.com/jeep/2p5bm...determine.html

summit700

thats great thanks alot.. now to bug u some more what years am i able to get an engine from that will swap out without to much trouble..?

cruiser54

91 to 99 XJ for sure.

summit700

if im getting anything other than i 91 do i need to swap my sensors into donor engine or just swap and go.. just wanna be sure im buying the right motor. thanks

DFlintstone

In the interest of being complete, sharing information, the block casting number is located on the LEFT side, forward of the motor mount.

Be sure it is not a late 99 with coil packs. Again I'm no expert, but you likely will want to keep your sensors matched to your year/PCM.

summit700

hate to be a pain but what sensors am i taking from my engine

summit700

also im assuming i can get the engine out of a cherokee or yj?

cruiser54

All of them. Intake and exhaust manifold, dizzy, flexplate etc depending on the year of the donor motor. This is so easy. Just do it.