Has anyone else thought about...

[89 MJ]

Have any of you thought it would be really cool to put a 4.0 in a JK/JL/JT? I think it would be cool, but a lot of work for minimal, if any, gain. Just seeing people’s faces after they saw it was 4.0 swapped would be funny. 

[Dzimm]

That would be interesting for sure.  I wonder though if the extra weight of the newer vehicles would give it trouble.  

[schardein]

I like the 4.0 engine, but not sure it would be an upgrade over the 3.6.  I don't have any firsthand experience, the only JK I've driven had the 3.8.

 

I do remember when I first heard of the JK getting the 3.8 V6, I thought, history is repeating itself.

 

Does anyone know the history of the CJ-5 and the significance of 1966?  Prior to that year, the CJ-5 was only available with a 4 cylinder.  So many people were putting Buick V6s in them, that Jeep purchased the rights to the engine from GM, and started putting it in the CJ-5 from the factory.  I read on another forum where a guy who was around back then said that Jeep engineers actually went around and looked at some of the swapped Jeeps to get info for what they had planned.  The Buick V6 lasted until the AMC buyout and the 232-258 I6 appeared.

 

My point?  When is Jeep going to put a V8 in the Wrangler?  They should take a pointer from history and buy the Gen III LS from GM and start putting it in the Wranglers... you know, like everyone else is.

[JMO413]

2 hours ago, schardein said:

My point?  When is Jeep going to put a V8 in the Wrangler?  They should take a pointer from history and buy the Gen III LS from GM and start putting it in the Wranglers... you know, like everyone else is.

Never it won't pass crash testing. There is not enough crumple zone with the V8. 

[derf]

If I was going to do all the work to swap an engine into a newer Jeep I'd do a V8.

 

The 4.0 is decent engine but there are better options.

[scguy]

Interestingly enough, Fiat Chrysler has shown plans of developing a new inline 6, turbo at that. That would be a nice 4.0 alternative in the newer Jeeps.

[derf]

4 minutes ago, scguy said:

Interestingly enough, Fiat Chrysler has shown plans of developing a new inline 6, turbo at that. That would be a nice 4.0 alternative in the newer Jeeps.

It's going to be based on the current 4 cyl turbo in the JL now.  It won't have anything in common with the 4.0 except that all 6 cylinders are in a row and have the same firing order.

[scguy]

Right, I wasn't saying it would be based on the 4.0, but rather, a spiritual successor if you will. Except with power.

[89 MJ]

1 hour ago, scguy said:

Interestingly enough, Fiat Chrysler has shown plans of developing a new inline 6, turbo at that. That would be a nice 4.0 alternative in the newer Jeeps.

Ohhhhhh

[strictlyxjs]

My boss believes the only engine thay belongs in a jeep is a 4.0. He 4.0 swapped his m715 and even helped a quy 4.0 swap an old rolls royce limo. He was looking to 4.0 swap a jk and it appeared the nose of the jk was to short for the 4.0.