The 4bt comes in alot of bread trucks from what i understand. Other than that im not sure what they come in...

Yah mainly bread trucks and frito lay trucks, some other commercial rigs. Some even came with TH400 transmissions.

thats good to know , i seen a few of those in junk yards around here , it might be something to look into in the near future

The 3.9L/4BT Cummins is an engine in the same family as the 5.9L Cummins turbodiesels. The 3.9L/4B is an inline four-cylinder turbodiesel that was popular for many step van applications including bread vans and other commercial vehicles. This engine is also used in various industrial and construction applications. With a cylinder bore of 4.02 inches (102 mm) and a piston stroke of 4.72 inches (120 mm), the engine had a wet weight of 745 pounds (338 kg). In recent years it produced 130 hp (97 kW) and 355 lb·ft (481 N·m) of torque. The 4BT today is also popular as a conversion engine among many light-duty pickup trucks that were originally equipped with gasoline engines. This is due to its high fuel efficiency while producing power comparable to the original light-duty gasoline engine. The 4BT engines have the same pistons, connecting rods, valve train components, and injectors as their 6BT counterparts.

what would the fuel economy be on the 4bt? is it enough to make up for all the work to do the swap?

fuel economy is overrated lol i just care about the power and tourqe its putting out lol

Personally id Ihad a diesel Liberty, I would put 1 tons under it and drive that, instead of trying to reinvent the wheel.

you can mainly find the 4bt and the trans (forget what its called) in all bed truck delivery style vans. fed ex, frito lay, anything like that most likely has the 4bt in it..you can also buy one brand new for like 10k or something i'm not quite motivated enough to send you a link, it is my b day and all lol

happy birthday , get off the forum and go drink some beers

yea a deisel liberty is like 15 grand i beleive 05 was the only year from what im told

that swap was beautiful!

Mileage kinda depends on your setup but I've see this swap in a fullsize chevy getting 25mpg and pull trailers all day long. Most people boast 20-30+mpg again depending on your setup.

4bt wow yeah 4cyl would be called a 4bt. i've been planning on doing that swap for like 2yrs but i am terrible at saving money and following through long projects. good luck with whatever way you decide you wanna do keep me posted if you do the 4bt. wanna know how hard it is.

Also you have to look at this from a straight finacial standpoint. Figure you get a complete 4bt and it had relatively low mileage you are looking at 1500. Then you need a decent trans and for would it would have to be a nv4500 so another 1000. Then you have the time to do this swap right. cooling issues, new/modded driveshafts. By the time you are said and done doing the swap you will have 500+ hrs and 10k. YEah it would be cool, but take forever to recover your investment in fuel savings.

i dont know how 1200 pounds or so would fair under the hood of an xj or anything unibody. The 5.9 Cummins is a big engine under the hood of a pull size dodge.