House my grandson is planning to make an offer on includes a garage and in said garage is an engine that has been tentatively identified as a Jeep 4.0

Appears to be complete from what I can see of it.

Some other stuff in the garage, lawn tractor, generator, trailer. Unclear at this point if the owners intend to clean out the garage as part of the sale (they've already moved, place is empty) or if it goes with, or if it's negotiable one way or the other.

Just trying to get an idea what that engine (assuming it's complete and in running condition) might be worth.

That engine was in my 2001 Jeep Cherokee and it was widely used throughout the Jeep lineup. I doubt that it would fit in any of today's vehicles of any make. I have no clue as to value, if any.

The Jeep 4.0 straight six, if in fact that's what it is, is next to the definition of "bulletproof" in the dictionary. One exception is early 2000 models where the head is prone to cracking. But is this engine any good? That is the question. Some pictures would help in for verification and narrowing down the year.

quote:

Originally posted by egregore:
The Jeep 4.0 straight six, if in fact that's what it is, is next to the definition of "bulletproof" in the dictionary.

What little I think I know... IIRC!
I believe I have seen it listed (by some) as the longest basic block designe in a production engine ever made... going back to the '60s or so... maybe older. Sometimes it is lovingly referred to as a "tractor engine" due to it's low revving but high torque at minimum RPMs. There were several various configurations over the years. I have the "Renix" version in my '89... The first version with multiport fuel injection, rated 177 HP. That version covered only 3 years. It is also the base block of the older carbureted 258 CI jeep engine. Minor changes in '90, mostly to the head, oil filter location, and engine electronics / fuel injection and was dubbed the HO (High Output) version at 200 HP. Don't remember the newer changes or when it was discontinued.

thirsty, and tends to pre-detonate (ping). That's my experience anyway. Very torquey though.

My family had them in an 87 XJ, an 85 XJ, 1994 XJ, and a 2004 TJ

Bulletproof begins to describe them. With some basic garage mods I had one that would outrun many other mid-80s rides. Sounded like a jet sucking air in. I beat the bejeezus out of that truck and it just wanted more.

The early 90s changeover to Chrysler changed some parts from iron to aluminum, but they remained very strong and reliable. Mine was an 87... and never did the motor ever give me issues.

If complete and rebuildable, it should be a high-demand motor downeast or in the North country for ‘wheelers.

00-01 heads are prone to crack;kind of odd that at the very end of its production run, Chrysler did something to make it NOT bulletproof.

quote:

Originally posted by PGT:
00-01 heads are prone to crack;kind of odd that at the very end of its production run, Chrysler did something to make it NOT bulletproof.

I don't find it odd, Its par for the course for Chrysler. Give them something bulletproof and they'll find a way to mess it up. This from a guy that's been driving them since 1977. Its why they're in last place among domestic makes. Defining them as lazy and stupid is almost a complement.

My grandson had a cheropig with one in it, and somehow managed to mess it up. Not a big surprise, his nickname is Crash. Anyway, he had people stop by the house and try to buy the thing just to get the core. The value is in that core if it can be rebuilt. Ya just can't tell by looking, or at least you probably can't.

Chrysler moved to V6 engines, trying a couple of anemic mini-van engines that were gas hungry and lacking in any kind of performance.

Back in the day they even included decal back by the gas filler of 4.0 liter high performance. The local modification was a replacement of 258 no performance. Close to true. So back to the question. The important question is what year. The '95 and '96 were good engines. The later ones were in free fall decline. Calling them junk is too kind.

All I know is that my '05 Wrangler (with that engine in it) has over 248,000 miles on it and it's still my daily driver.

The straight six 4.0 sucks gas, pulls like a mule and is basically bulletproof. I have no info on the late model straight sixes that might have issues. I only know about the older ones.

quote:

Originally posted by Let's Go Rangers:
All I know is that my '05 Wrangler (with that engine in it) has over 248,000 miles on it and it's still my daily driver.

I feel like a piker, my ‘05 only has about 130,000 on it with that engine.

We sold our 92' Cherokee country with 200,000 miles on it and my BIL put anther 175,000 miles on it.

Our mechanic told me that engine and the tranny was bulletproof.

I miss that Cherokee.

My 2001 Cherokee is still going with over 200,000 miles. No issue with the engine at all. Mileage isn't great, about 14 MPH but it keeps going.

My buddy's Wrangler is at about 240,000 miles with the 4.0 and it's still going strong too

The Cherokee with that engine is a classic, had 2 and the torque almost seemed too much at times for it.....it liked to wag it's tail.

Great engine

It’s a good engine.

It’s successor was weak.

It’s successor successor, the current 3.6, is a good torquey engine as well. I think I read somewhere that there were rumors of a straight six coming back to the lineup.

If you're gonna tear it down, they make a 4.6 big bore kit. We had one in a Cherokee sport in the early 90s. 4.10 gears made it scoot.

My S-I-L is a off roader with his Cherokee(s), on his second one. Bodies,axles,transfer cases, differentials get replaced. He has yet to trash a 4.0L engine.

I felt bad about three months ago at a off road park, I drove it and trashed the front differential. He said “It’s not a good weekend unless somebody rolls one or breaks something.”

Craigslist running 4.0. Usually go in the $350 -$450 range.

Crappy cell phone pic, couldn't uncover enough of it for a better ID, moving blankets frozen in place.

The plan is to tell them that he'll accept the place as is and deal with cleanup/disposal himself, IF, and only if, they leave everything as it currently is.

Otherwise, come and get EVERYTHING, and leave the garage as clean as a whistle.

There is enough blur detail to tell that it is a late 1980s, possibly early 1990s, fuel-injected.