Disassembling our 1993 Jeep XJ engine

[@soflsteel777]

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

[@THROTTLEPOWER]

I agree!

[@islandaerial3414]

See I Do Cars for more engine teardowns 😉

[@THROTTLEPOWER]

@@islandaerial3414 👍

[@PRRGG1]

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.

[@A.R.77]

XJ engine teardown takes about 20 minutes, love it.

[@peterzenner2020]

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

[@gatorwhiskers9011]

Easily my favorite engine of all time

[@robr3015]

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

[@WeekendWrenchTurner]

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👍🍺

[@austinaubinoe2195]

Incredible that you can use the same video to fix your 1966, or a 2006 wrangler

[@g_force3857]

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

[@dlavway1]

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.

[@jasonpope3181]

That block continued until 2006

[@dlavway1]

@@jasonpope3181 thank you, I wasn’t sure. It was a great engine..

[@milt6208]

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

[@floydblandston108]

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

[@jacobnesbitt4793]

You guys make the best videos on KZbin. 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!

[@daveb7663]

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!

[@nerd1000ify]

The Renault F9Q turbo-diesel with a non-crossflow cylinder head was still being used until 2015 in the Suzuki Grand Vitara. A bizzare mix of old and new tech, counterflow head and 2 valves per cylinder combined with modern variable geometry turbo, intercooler and common rail direct injection. The F9Q was designed for transverse installation, but Suzuki put it in longitudinally because the Grand Vitara was at the time a proper 4WD with a transfer case. This along with the engine design makes for some very long intake ducts, and an obnoxiously difficult to reach thermostat...

[@CollinWeis]

Ford was still doing it as late as 1997. And VW TDI diesels are reverse flow pre-2007

[@skylinefever]

Many OHV inlines were built this way because it was cheaper and easier to do than crossflow. Also, even many SOHC inlines were built this way because it was cheaper than crossflow.

[@padillaxA]

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!

[@bradmaas6875]

Can't always get the right tool, dealer had it but wouldn't sell it. I bought a large socket, ground it down and made the proper tool for 1/7 the price

[@nuttfarmgarage6434]

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.

[@mvdesigncustomworks5460]

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.

[@HellFighter55]

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.

[@CFChristian]

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

[@greghenton8632]

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.

[@willarterberry3392]

one of the most durable engines ever

[@goatlocker219]

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.

[@A.R.77]

4:00 ~ Very nice!

[@NuclearSandwich7]

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

[@theirishconservative2536]

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

[@jasonbennett9995]

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

[@mikek1187]

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 :)

[@pillowbugg]

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

[@MrKnoxguy101]

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”.

[@WayneMacDonald1]

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...

[@skylinefever]

One sweet thing to do with a junk 4.2 is take the crank and rods, then fit them to a 4.0 block and a set of oversized 4.0 pistons. With +.030 pistons, you get almost 4.7L.

[@julianobrod]

Six inline, best sound!

[@gabechiplin8140]

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😂

[@nicolasdepaoli2387]

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

[@nuttfarmgarage6434]

The 4.0 was an AMC design inherited by Chrysler when they bought AMC. The basic engine design goes back to the AMC 232ci first used in 1965.

[@relaxationispossible1593]

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!

[@himhaile]

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

[@archipiphanyworkshop860]

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

[@CanadaBud23]

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.

[@digitalrailroader]

*Happy David Tracy Noises*

[@colin5064]

Man that's an excellent video very informative and inciteful

[@ruprajsengar8706]

Love from India 🇮🇳🇮🇳🇮🇳

[@dsauce8780]

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.

[@georgemullin7772]

What a great video thanks good job

[@agafonovas]

Gotta say I love this guy.

[@thornscoop2]

Awesome been waiting for this!

[@9000rpm-cc]

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

[@johnmathisen1167]

A hell of a lot cleaner than my 1997 4lt

[@baukevanderkooi8712]

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

[@stevengawlik1282]

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

[@davidthompson245]

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

[@ronlynch7744]

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

[@Trapper50cal]

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

[@hyattbusbey3563]

I guess worldwide the F engine is more prevalent but Jeep produced over 5 million of just the 4.0L displacement of the AMC 6. An engine produced for 54 years. Toyota's F family was only produced for 43 years.

[@shanerorko8076]

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.

[@LittleMikeStarCraft]

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.

[@oikkuoek]

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!

[@SpatialDragon]

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.

[@matthewbardeen4821]

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!

[@backwoodslunatic2615]

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

[@somebeech30]

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.

[@jamesdiehl8690]

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

[@elij.s.7580]

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.

[@drenchedpaperboy]

Davin! Get you some Working Hands, brother!

[@luckygunner8089]

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!

[@jonathanburg9496]

Size for the filter adapter is a T60 torx.

[@philtucker1224]

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

[@thundermite1241]

I kinda want to see this 4.0 get stroked and supercharged

[@nacman2010]

Genial proyecto espero puedan hacer el armado

[@interstate80.]

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

[@Ben-in6qh]

Push rod, non crossflow, distributor, cast iron, that engine is so American

[@ellieprice363]

Made to work hard, not to win engineering design and performance awards.

[@skylinefever]

That's what happens when engines aren't taxed on displacement. In places where engines are displacement taxed, there is an incentive to quickly make denser engines that may be more complex. I find the example of the 1985 Nissan Maxima to be an interesting example. The USA had no displacement tax, so Nissan shoehorned a 3.0L NA V6 in a ridiculously tiny underhood space. That made the car unreliable due to intense underhood temperatures. However, since Japan had a displacement tax, Nissan put a 2.0L turbo V6 in that same space. The situation could only have made a bad car even worse. I find it funny that they didn't exactly get a 240Z over there either. Their version (S30 Fairlady) came with a 2.0L L-series engine due to tax. A very rare and absurdly expensive model called the Z432 had a DOHC 3-carb engine partially because of the heavy tax. Japan got various Z-cars that were different and had smaller engines, until the 300ZXTT arrived, their version was named the Z32 Fairlady Twin Turbo.

[@CanadaBud23]

Thanks for the compliment!😁

[@ellieprice363]

@@skylinefever I owned 1988 and 1992 Nissan Maximas with 3.0L V6 engines Both were powerful and reliable with no overheating problems.

[@skylinefever]

@@ellieprice363 The engines didn't overheat, they were some of the most trouble free V6 engines there were. The problem was that the engine was packed so tightly that the radiant heat destroyed many other car parts in 1985. They may have resolved it in 1988, I know the 1989 Maxima did resolve it.

[@Oddman1980]

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

[@patrickreid2767]

Great work! Very enjoyable!

[@wayanfrombali4513]

Nice work, great job! 🔥

[@N-Scale]

Good looking motor inside for 150K

[@jimwright8379]

Awesome engine!

[@JoDoDesigns2011]

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

[@skylinefever]

It might not be a bad idea for Hargety to make a similar video. They could be rebuilding a limited slip while swapping to a different ring and pinion. They would also have to be showing the processes of setting clearances, gear contact pattern, and the other related stuff.

[@JoDoDesigns2011]

@@skylinefever they do have one Davin did it on a 69 Camaro, it was a 12 bolt but, the fundamentals are there. 👍

[@skylinefever]

@@JoDoDesigns2011 Oh, okay. That certainly is worth watching.

[@broman1536]

Fascinating stuff

[@elijahheadrick1389]

The answer is "Yes, they did just spin that on."

[@DanikGarage4x4]

Nice🖖👍

[@thespicemelange.1]

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.

[@blurglide]

Make it a 4.6 stroker!

[@bobblossom2713]

Why don't you spray wash before dismantling?

[@chrisbresson2571]

Do a Hesco 4.7 strocker

[@claycoates5056]

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

[@raymondparks4108]

You can punch it .60 over and use the 4.2 crank. Bump the compression to 9to1 cam it and get over 200hp and still be a good running reliable rebuild. If ya turbocharge it, well then, yee haw!

[@CanadaBud23]

You mean it should net you 300hp not 200hp lol.

[@raymondparks4108]

@@CanadaBud23 Nope! I mean 200. Maybe 300 with a turbo and engine management system, but that is not going to happen on this build.

[@CanadaBud23]

@@raymondparks4108 I have a 4.7 @ 10.5:1 compression that I ran NA that made 300whp with a top end stroker kit that ran 12's. With a new intake and exhaust manifold that I fabricated and a 226/234 billet roller cam bumped that up to 340whp. Now I run 12.5psi of boost on top of that with 480K miles on the block and head which is little over 620hp or about 580whp. SO a well put together of the shelf stroker should be around 260/320 - 270/350 in power. This motor in particular will probably see around 200hp just from the small bump in compression and much better machining and better manufactured hard parts.

[@raymondparks4108]

@@CanadaBud23 well try to talk David into it.

[@CanadaBud23]

@@raymondparks4108 Yeah, it'd be neat and fun but I'm wondering if it's like 'customer' car that he's just making a show with. They probably don't want something like that but just a regular old rebuild.

[@scottdoubleyou563]

Yeah those motor mounts are pretty terrible. Upgrade to Brown Dogs. You won't regret it.

[@SingleJack]

Терминал 1 цилиндра помечен на крышке распределителя.

[@michaelatkin9649]

Please tell me you're putting in a stroker kit or something that'll wake up that anemic engine

[@andrepienaar6459]

Why is a new top on its way before assessing the old one? Have the pistons been numbered? I'm getting smart by watching you guys!

[@ezequielpiacenza3776]

Ese motor se usó en el tc de Argentina como opción del slant six de los Dodge cupé de carreras

[@futten3230]

ya can get aluminum heads for these engines now

[@CollinWeis]

Wow! Timing chain slop and wear like that on the conn. bearings? Surprising for a 4.0L

[@ellieprice363]

Poor oil and filter maintenance most likely.

[@CollinWeis]

@@ellieprice363 I was thinking the same thing

[@benbentley26]

So how did you determine to replace the cylinder head from the off?

[@skylinefever]

Iron heads are crack tested with Magnaflux.

[@Dirt_Breaker]

My 2003 to Jeep with the 4L has a top end tick towards the front. My guess is some slop in the valve train likely on the pushrod/rocker caused by wear and tear. Would you have a better clue as to what it might be?

[@courtneychappell8801]

America 🇺🇸

[@jamesdiehl8690]

Shame on them stores not staying open for you! 😀😃🙂🙃😊 Lousy stores!

[@rayvarnson8976]

Why stop with tear down ?

[@loripapuatimika2137]

👍👍👍👍👍 mantap bos

[@halkert2z632]

Oye una pregunta, que ING es esa que es armar y reparar autos y luego venderlos me gusta lo que haces con esos motores viejos a dejarlos nuevos

[@БорисКорчмарюк-ф5я]

Coll 👍

[@Veldkamp88]

My 99 has over 272k miles. I'm afraid of what it looks like inside, lol.

[@raymondparks4108]

Probably better than you think.

[@Veldkamp88]

@Raymond Parks she runs and got me through the blizzard easily a couple of weeks back. I can hear the lifters, though. Probably around summer is when I'll start giving it TLC refreshing the engine.

[@raymondparks4108]

Hey Steve. As you saw in the video, the lifters start to mushroom and the cam lobes wear down. There is a lot of trick stuff you can do to the 4.0L and still keep reliable. A 200hp build is cheap and, relatively easy. I say the but I was a tech for 20 years. Doing it in your garage will put the hurt on you but will be worth it.

[@Veldkamp88]

@Raymond Parks she already has put the hurt on me resurrecting it from the dead last year, haha. Right now, my main concern is interior electrical gremlins. Lighter port and the heated seats don't work, but the fuses are mint

[@jamesdiehl8690]

Crank gear looked kinda chewed on the teeth too.

[@ianatkinson8464]

😎👍

[@beksd9362]

Copper bearing