AMAZING! Diesel Jeep Drives 12 Feet Underwater!


This week on Dirt Every Day we put a Cummins diesel in this Jeep and we’re going to drive the whole thing across this pond. (upbeat rock music) (upbeat music) You guys remember Tube Sock, our ’97 Jeep Wrangler TJ? Well, this Jeep has been all over the place. We’ve had it in Moab, we took it to Hawaii, I even let my camera crew drive it and after that the thing was a giant mess. The

Jeep has been used and abused, it’s run a bunch of different trails and it’s time for a refresh. So I tore the thing down and I’ve got a crazy stunt that I want to do with this Jeep. I want to drive it underwater. And to to do that I’m going to put a brand new engine under the hood and brand new drivetrain parts. This is a brand new Cummins diesel engine we’re going to stick in

Tube Sock and everybody wants to see a diesel-powered Jeep. Hey, Rob. – Fred. – [Fred] What do you think? – What happened to this Jeep that was totally a together, working Jeep? – Well, you know, I decided to do an an engine swap. – Why not? They work great. – So I called you in here because you have a boat. – I do have a boat. – And I’m going to drive this Jeep underwater. – Yeah, sure, okay. (laughing) All

right, I’m on board. – Um, I ripped everything out because I want to drive it underwater, but I want to be able to get out of it in case we have any issues underwater. Also, I got these Bestop seats. It had those really nice racing seats in it, but I wanted nothing around me. Cages out, seats will mount in there, they’re really simple, they’re just like basic vinyl seats. This is what you’d put in

an old CJ. – They’re pretty boat like. – [Fred] Yeah, yeah. – I like that. – I’d put this in my boat. – It’s going to be brilliant, so here, put these in there and I’m going to go work on the engine. – I’m just going to go back to work on my boat. – So this is our engine, this is a Cummins four cylinder and this is Steve. Steve’s from Cummins. Steve, what can you tell

me about this four cylinder? – All right, so this is the ISF 2.8 liter, we use this all over the world. We use it here in the States right now in a lot of industrial equipment, mini excavators. This engine is about 540 pounds, so the traditional 4VT that everyone talks about and loves is about 300 pounds heavier than that, but it’s a little bit too big and too heavy and cumbersome to put in a Jeep like Tube Sock. –

What type of power numbers are we looking at? – So this one in its stock form is around 160 horsepower, it’s about 266 or 267 foot-pounds of torque which, that’s low end torque, so you’re getting that around 1,600 RPM and that torque range is pretty broad, falls off around 3,000 RPM. – So what we’re getting here is, we still have a small package like the engine that was in Tube Sock, but we’re getting more power, making

more torque, this is a great upgrade for either a four cylinder TJ or a straight six. How does it work underwater? – I don’t know. (laughing) We’ll find out. I think a lot that will depend on how good a job we do waterproofing, you know, this isn’t a mechanical engine, it’s an electronic engine. – So there will be some computers running this engine because it’s a common rail. We’re going to seal all that stuff up or

put it in an air tight container. Let’s put it in there. – All right. (upbeat music) – Woah! So this is the plan, we put the engine in, the motor mounts on the engine does not line up with the four cylinder motor mounts, however, the motor mounts on the engine may line up with the four liter, six cylinder mounts which are on the frame. This frame is for a four cylinder, so we’re going to pull the engine

out, cut the stock motor mounts off, clean up the frame, and then build something new to hold the Cummins in Tube Sock. (upbeat music) In order to bolt this engine up to the transmission and transfer case in the Jeep we’re going to need some adapters. This has an SAE type bell housing and this is the transmission we’re going to use. The four cylinder engine had a smaller transmission that was an AX5. This is Steve from Advanced

Adapters. What transmission are we putting in now? – We have a New Venture 3550 we’re going to put in place of it because we know the AX5 wasn’t going to stay together. Plus, we’ve got to have an Atlas because Tube Sock needs an Atlas. – Well, the AX5 that was in here had a low gear set in the transfer case, but that transfer case and that transmission would not hold up to this engine and that

transfer case doesn’t bolt to the 3550. Now, the 3550 and the AX15 are kind of the middle ground transmission that would go in a TJ. – They’re very similar transmissions, they’re so similar, they actually use the same bell housing. – So if somebody had a four liter TJ and they wanted to put the Cummins in, they could probably keep their manual transmission and whatever transfer case they have. – [Steve] Yeah. – Because we had a four

cylinder we’re replacing everything, we’re starting fresh, we’ll keep our axles, but everything above the axles is getting changed in the drivetrain department. Now, we have two flywheels. – Yes sir. – One of the flywheels came with the engine, the other flywheel is off of a four liter. – Yes. – So we’re going to actually run both of them. How are we going to make all this work? – Well, what we started off with, we have a ring here

that’ll go on the back of our engine and now that now has a four liter Jeep bolt pattern. – So that’ll bolt to this. – That bolts directly up to this. We’ll have the factory fly wheel bolted on to the Cummins engine, then we’ll have another adapter that looks just like a four liter crankshaft. The four liter crankshaft will bolt right up so it’ll be a factory AX15 clutch, the flywheel, hydraulics, everything’ll make this a really

simple swap when replacing a four liter. – Let’s put all this stuff together and put in the Jeep. (upbeat rock music) So back to work, just, like, 15 more things to do. 1,500 more things to do. Whenever I do tires, I bring ’em here to America’s Tire which is right down the street from my shop. They have shops all over the place and their Discount Tire line is also all over the place and you can order this stuff online

if you want. So these are Maxxis Trepadors, these are one…

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