Love the engine rebuild step by step breakdowns. Please produce more of these, I could watch them all day.

Love these vids. Davin makes it feel like you are helping out your best mate in the workshop - he is the perfect presenter for this format. I like watching him work so much I am disappointed when the video speeds up😂

10 years ago I bought a 1997 Jeep Cherokee Sport 2 door 4X4 with the 4.0L and a manual 5 speed. I think I paid $2500, it was very straight and the interior was immaculate. It was the same color as this 1993. My Cherokee developed a whiny 5th gear synchro and I ended up selling it after 6 months... yes, I totally regret it. It was a perfect 2nd vehicle, not very large in size, so it was easy to park. Has lots of luggage space, a roomy back seat and it was 4 wheel drive. The MPGs weren't bad either, it would average 18-21 in overall driving. :-(

Wow what a throwback. I live just a couple minutes from the Toledo assembly complex and used to watch these roll off the line through the giant plate glass windows of the OLD Willy's plant.

Awesome. The video paid for itself when I learned the big hex wrench/bolt-nut trick. Keep 'em coming!

XJ engine teardown takes about 20 minutes, love it.

I've got a '66 AMC 199ci that this is super helpful to watch in order to see what's needex to tear it down. Thank you👍🍺

I had a 2000 Wrangler with the 4L six. I think it was the last year they used the cast iron block. Loved that Jeep; the engine was strong and smooth. Between my son and I we put over 7 years (mostly in Maine) of hard driving on and off the road with that Jeep and never had a problem.

Very clever trick with that bolt and double nut to make your own tool!

I don't have a car and workshop but i always watching hagerty, succes bro

Very few people *have* been inside one...due to their incredible ability to drive their chassis all the way to the scrapper!

You guys make the best videos on KZfaq. The content as well as the production are truly top shelf. If these videos were completely uncut I would still watch every minute. Keep up the great work!

Ah, That one was a young buck with 150,000 . Mine and many others have 250 or more and run good ! Great job on the tear down Davin . Going to be a perfect rig when your done ! ENJOYED...

I have a 93 jeep Cherokee 2 door did the same thing last summer the timing chain had that sound to it .

I did that hex thing when I needed to change the oil on my aircooled vw transalxe. Welded a bolt to a long bar so I could force it loose without being under the car.

the timing chains on those were known to stretch out prematurely. I even had one so bad once that it was slapping against the cover and I thought it was a main knocking. it's a really solid platform other than a couple of little things like that

I suppose ordering a reman head is good for this episode. The 4.0 needs no special machine work, so rebuilding it is less interesting. Tips for DIYERs: 1. Read the casting number of the old and new head, and make sure they match. 2. If the Jeep head says 331 but doesn't say TUPY, don't use it. Those are prone to cracks. Many people can either sell you a brand new casting that is reinforced, or you can buy a 331 TUPY from someone who specializes in 4.0 Jeeps. Some Jeep enthusiasts spend all day looking for 331 TUPY heads in junkyards, buying them as cores, selling them to machinists, and machinists offering them to you at a good price. 6:48 ETCG defends timing belts because they get replaced before the timing can get out of whack. Yeah, well I'd rather have an engine get the timing a little off than have an expensive grenade attached to my engine. Interesting stuff, it doesn't look like this rebuild will need anything unique. Given how common the 4.0L is and how many love it, I'm sure rockauto rebuild parts are a very short wait. I have heard that the replacement pistons from the later 4.0L fit the early 4.0L just fine. This is an advantage, the late 4.0L pistons have a performance coated skirt and a better 1.5mm X 1.5mm X 4mm ring pack.

I’ve rebuilt 2 Jeep 4.0 engines, they are about as simple of an engine as you will ever find. The only difficulty is getting the lifter preload proper, as they don’t have adjustable rocker arms. With milling the head it may require different length pushrods.

I love that your mention improvising your own tools when needed. I've always done this where needed,but there's always that 1 guy with a fully loaded toolbox and 100k in debt that gives a hard time about not having the "right tool". To each there own but money or lack there of doesn't need to hinder a job well done!

I had no idea that they were still producing engines in the 90's without cross-flow cylinder heads. I though that went away in the 70's. Love the videos, keep up the great work!

Stroker crank for the extra cubes would be cool. I’ve seen a couple of them make pretty big power for what they are.

@4:00 great improv tool! I bought the hex but good to know this.

150000 mile it’s only just worn in… good video lot better when the lights are on 👍👍

I loved these engines, I had four cherokees with different versions of them from 1988-1995 or so. I put 350,000 miles on one of them without any major work.

Easily my favorite engine of all time

So your right about a project, I am currently pulling my aw4 transmission out of my 1995 Jeep Cherokee Sport and swapping in a new one. Already overhauled a 1992 Jeep Cherokee 4.0 l Engine for this build, had around 361k on the original engine, flattened my cam/lifters and bent 4 of the rods. Surprisingly I didn't have the head gasket blow.

I am not a mechanic but I still enjoy watching a pro at work.

That music @ 5:48 was the highlight for me. Wasn't expecting that. Haha.

That 90 degree oil filter adapter is the biggest oil leak problem on the Cherokees. You can take the adapter off and use a smaller Toyota filter to go directly to the block.

i had one of those and I had 380 thousand KMs on it before trading IT for something else it's a great engine!

These things are just about bulletproof.

About average for 150k. Love all this stuff.

Good example of regularish oil analysis can detect those wear items by what is in the oil.

3:45. In all my years of wrenching on cars, it had never dawned on me to use a bolt in that fashion. Very cool :)

Welcome to the hell that i love so much . 4.0s are easy and a pain in the ass at the same time

Not sure about the later Jeeps but when I restored a 1984 AMC Jeep CJ7, I swapped the extremely tired 4.2L inline six and replaced it with a 1997 Jeep (now owned by Chrysler ) 4.0L fuel injected inline six out of a Grand Cherokee. Functionally it looked identical to what you're wrenching on. Perhaps one of the easiest swaps ever as everything from the old 4.2L bolted up to the 4.0L block. The wiring harness for the 4.0L was trashed by whoever pulled the engine so I ordered a replacement along with a harmonic balance which doubled as a crank position sensor. The change between the old and the new was dramatic... better power, instant start, better fuel economy...

Simplistic, reliable, robust, beautiful engines

I would of never thought of using the hex head of a bolt to make a tool. Nice idea.

Davin always calling me out about not hitting the shop time punch clock, going to have a garage again within a week so I promise to pay you back in OT hours! Keep up the good work!

Good call on using a bolt for that allen head. A lot of times you get so focused on the tool needed that it can cause us to get “simpleton syndrome”.

One of the most reliable engine ever made, Mopar or no car

Loving the rebuild. It's also best to have a timelapse video. I enjoy that a lot.

You can also use 2 hex wrenches to make the larger size you need

Usually that oil filter housing bolt is so tight on there that you end up breaking tools over it. It's a very strong bolt though lol. The bearings are typical of these 4.0L's This ones seems to be a little bit grimy and lack of regular oil changes obviously. You parts and everything look typical though, so that's a good sign. I don't know what head you'll be getting but you should have a 7119 or 7120 head on that motor. If you are getting a rebuilt check and make sure you don't get a 0331 or if you end up getting one make sure it's '99 or EARLY 2000. Later ones have a thinner galley casting and are prone to cracking. Since yours is a '93 they SHOULD be giving you a 7120 head which is a good head (and sought after). Check the old head to make sure you have a 7120, looks to be in fine shape, people buy those in pretty much any condition or than damaged seats, they are worth money still. Cam wear is typical and chain wear is typical. Very rare the chain breaks but a lot of them make noise like that, it's just it rubbing against the guide. Make sure you get a brand new guide the old ones or even NOS ones can be brittle and chunks break off into the oil pan. Another thing to check for is (or I should say the engine shop) the machining squareness, if you are having all the surfaces redone on these engines it would be done already but yeah the manufacturer didn't do a very great job at machining these inline or squarely. The shop will correct everything if it's all resurfaced again. On the contrary of how 'anvil like' they are they weren't machined very good at the factory lol. You can also bump the compression a bit if you like, they are not that prone to detonation these days with today's fuels so you can get some HP and efficiency out of it from the rebuild. Yeah these things are great. Lol that tray of tools you had ready is probably more than needed to take these XJs apart down to a shell, they are so super simple.

Use a bold head for an internal hex replacement that's freaking genius

Hilarious that I had to do the exact same thing with a modular 4v remote filter adapter through bolt/channel when I was test fitting and over torqued at bit.

Nothing better than being creative to solve a problem...working with what you have...

Cam chains have measurable drop/wear rate like motorcycle chains, yes? Both vertical and horizontal I would think...

I had an 86 Comanche with the 2.5 L 4 cylinder version of this and it was one of the best engines I’ve ever owned. Rock solid engine.

Gosh I love this guy’s work. Great job!!!

4:00 ~ Very nice!

Man that's an excellent video very informative and inciteful

That was the easiest I've seen one of those oil filter adapters come off!

Great tear down..I just did one last year for my son's tj..it was fun..I think I got one of those old xj engines in the back of my garage if you want it.

Haha he’s pullin the oil pump off at 1am while I’m up at 1am watching him pull the oil pump off 😂😅

What timing,finish work and there's a Hagerty notification!!

this thing is huge

Six inline, best sound!

So another trip to Thurlby's fantastic machine shop? 👏

Love the vid! Really want to do a stroker kit on my xj. But I don't really have the confidence for it (or the money) never pulled an engine before but done a lot of fun stuff already, just 23yo and this is my second offroad project, it's coming along nicely!

What a great video thanks good job

Can't wait to see what power it would make.

您们是一直非常棒的团队，在中国有非常多的小伙伴都在关注你们，期待您们的新延时拍摄

Well I have most sized hex sockets, but yes I had to make a tool recently. A timing chain tool to align the cams and crank on a 2021 MG MG3 which is actually built by SAIC motors. The only tools were ex China at 25 day wait.

Great engine...almost as historically relevant as the Toyota 2F. These will hold a lot of power.

I just finished swapping my Fanatec steering wheels from the big plastic nut style quick release to metal ones that look and work similar to a real world quick release steering wheel. I swap my wheels back and forth and none at all with a protective cap. It is about the only way I can afford to race cars, karts and drive semis. Sim racing/driving has come lightyears.

*Happy David Tracy Noises*

Hi Davin, the intake plenum looked absolutely enormous on that motor!🤔

man you've got a badass shop, but a pressure washer is a must have. before i tear anything down i degrease and blast the daylights out of it with 3,300 psi.

Motor mounts are a weak point on the XJ 4.0. Specifically the bolts where they enter the engine have a tendency to snap. Brown Dog makes upgraded mounts (both engine and frame side) for the XJ. Highly recommended!

Another excellent video on a turd of an engine! This series has saved me a fortune, revealing the secrets and design failures on these legendary engines, so I don't have to waste my money on buying these heaps of junk, especially today's blown prices. Thank you Hagerty and Davin!

Genial proyecto espero puedan hacer el armado

Awesome been waiting for this!

A hell of a lot cleaner than my 1997 4lt

Size for the filter adapter is a T60 torx.

when pulling the distributor, engine should be at TDC, on the COMPRESSION stroke!

Gotta say I love this guy.

Love from India 🇮🇳🇮🇳🇮🇳

This kinda makes me want to see Davin do a series on a diesel...

Yes I do have a project, posi unit in my 78 Camaro. 😁

Looks like the oil hasn't been changed for a few hundred years.

You are a master of mechanics!!!

This guys good and Adam Sandler aswell the 2 main guys on this channel keep posting the 2 of them

Davin! Get you some Working Hands, brother!

I kinda want to see this 4.0 get stroked and supercharged

Best thing on YT!

Amc242 onelove!

Quick thinking, Bingo Bango custom tool. 😎👍🇨🇦

Love these old 4.0 JK engines. I had a friend back in highschool (circa 2000) who had one, and he managed to find a company at the time who made a cam for it. Darn thing ran real strong! I was certainly surprised. Also, where did you get that rolling metal workbench? I've been looking for something just like that!

Nice work, great job! 🔥

150,000 miles, inside looks basically brand new... yeah, those engines will do that.

I love in-line 6’s. I’d pick an inline 6 over a V8 any day in a classic car

Are you guys going to be following this project? I've been waiting for you guys to do a 4.0L for a very long time.

Great work! Very enjoyable!

Awesome engine!

In 2005 they changed the setup to coil on plug. The distributor was changed to the dreaded oil pump drive assembly that fails with the horrible "chattering monkey" noise due to lack of lubrication. If it isn't addressed immediately or beforehand it will bind up the camshaft and grenade the engine.

Would have liked to seen what the lobes on the cam looked like and what the lifters look like relative to it and also the bearings from cam.

How strange. My 2000 Jeep, Grand Cherokee (WJ) Laredo has the 4.0. It was given to me and had sat for about seven years. After I had it running for a bit, it developed some leaks (no surprise there). So, I took the head and oil pan off and just sealed/gasketed things back up. My block had a flat oil filter mount, No adapter and not angled slightly down. Also, my engine block had no coolant passages between the block and head except at the very back of the block. The head had normal coolant passages around each chamber. Which is fine, it's never over heated. The coolant goes into the block at the front, flows to the back of the block, up into the head, then forward to the thermostat housing. But it's different than other 4.0's I've seen torn down. What gives? Do I have some rare Heavy Duty block? Is it common to certain years?

That one looks just like mine primitive but it works well I want to see what you are going to do to this one

Fascinating stuff