An Alternative 4.0 swap...

[oughtsix]

I've looked, can't find anything about this.

What about a JEEP 4.0L straight six swap? It doesn't seem like all that strange of an idea... and the motors are fairly common, if a little expensive. I'm just a straight six fan, and as the ford 300 is out of the question, this seemed like an option. Is fitment and cooling the only real obstacle I'm looking at here? I'm just tossing the ideas around in my head for now.

 

[BlackBII]

Whats wrong with the 300?

The only problem I can see is that the straight six is a long sucker, will it have enough room for a radiator?...and then you'll need to figure out a tranny and tcase..

 

[LittleBigFoot]

I measured the length of the block and accessories in my 92.5 ZJ. It'd be a very tight fit in a 4th gen engine bay. (What I got) The radiator would have to be ran elswehere and a few firewall modifications would be necessary but it could be done.

Hard thing is finding a good tranny for the 4.0I. Most chrystler jeep trannys are pieces of shit and will need rebuilding 4 times before 100,000 miles. Hyperbole, but they're still shit. The AW4 is the way to go as far as Sheep, I mean Jeep trannys.

If you can get your hands on one, measure the actual height of the 4.0. You might need a body lift to clear the oil pan

 

[dangerranger83]

I've always toyed with the tought of putting a striahgt six in a ranger. If I had a striaght six, I'd do it. I'm told the 300's when in f-250 high boys and others I think. They are motors with torque. I've seen what they can do and pull.

 

[Beanmachine7000]

I've always toyed with the tought of putting a striahgt six in a ranger. If I had a striaght six, I'd do it. I'm told the 300's when in f-250 high boys and others I think. They are motors with torque. I've seen what they can do and pull.

Motors with torque? They make about the same torque as the 4.0L OHV... Neither of these engines, in my opinion, are a good swap because they both make about the same power as the 4.0L OHV, but they would be twice as hard to swap in...

 

[AllanD]

The 4.9 EFI version of the 300 ford makes 265ft/lb, considerably
more than the 4.0OHV, but it makes that torque lower.

Moot point it simply isn't worth the work to put it in...

AD

 

[Hahnsb2]

The Ford 4.0 actually makes better low end torque than the Jeep 4.0. I like inline 6s but I just don't care for Jeep's attempt at it.

 

[UrbanRedneckKid]

The Ford 4.0 actually makes better low end torque than the Jeep 4.0. I like inline 6s but I just don't care for Jeep's attempt at it.

That Jeep 4.0 is actually almost a ford engine.
Back when all the American companies were making their own versions of the Willys, to help with the demand for WW2. Ford used in their version, a straight 6 that was formerly from one of their tractors. The motor has since evolved, but is basically still the same. An engine design that was used for about 70 years, with only technological updates like; better metals, bearings, cams, and fuel systems... That's a pretty damn good engine if you ask me. And I'm sure they would still be using it if it didn't get such bad fuel mileage and have such dirty emissions.

 

[Beanmachine7000]

The 4.9 EFI version of the 300 ford makes 265ft/lb, considerably
more than the 4.0OHV, but it makes that torque lower.

Moot point it simply isn't worth the work to put it in...

AD

Ah, I was looking for the number (I thought it was 222ft/lbs)...

 

[Mudhound]

The Ford built WWII Jeep was a 4cyl, NOT a 6, and the engine was the "Go-Devil", designed by Willys. Check your facts and educate yourself a little about things. Ford only got into the picture because they had the production capability to keep with the demand for the 1/4 ton truck.
Chrysler, may they forever ROT in hell, killed the AMC motors so that they could streamline the engine choices for their crap, and the AMC motors are KNOWN for going over 300,000 miles without major work: Headgaskets, water pumps, rings....

 

[Captain Ledd]

This seems to pop up every year or so lol.

It will actually fit surprisingly well as long as your not afraid to cut up the firewall. The reason is the Jeep's oil pump will want to sit right on the engine cradle bracket. So you need to move the firewall back a good... say 4-6 inches (which also helps fit it in), somewhere in that range. You'll actually still have plenty of room up front for a radiator.

And that's just about as far as she'll go, it was an earlier pic, but it didn't get a whole lot farther. It's resting on the passenger side axle drop bracket right there, but eventually it did start to make it past it, only to then hit the oil pump on the engine cradle, which is maybe an inch away on the right side there. Once you slide it back far enough, both will clear no problem.

But in the end it's alot of work and a V8 will fit a WHOLE lot easier. But if you have the jeep stuff laying around like I did go for it. I didn't have anything to mess with the firewall with so I abandoned the idea. But it can work.