Took one of my core engines to get a "refreshed" 4.0 for a doctor owned/driven Jeep XJ. As you can see I do not go through the engine 100% however this will fit the jeep perfectly as it probably will not be drove very much.
I'm loving the videos, I could tell this was a long one in the making. My favorite thing about your channel is how you explain what the proper way versus what it takes to just make it work. Not everybody has the budget or skill to do a complete 100% rebuilds.
Nice project young man, There is nothing wrong with reusing parts during a rebuild as long as they are still good and with in specs. Many people don't realize it, but when one engines were built in the factory, there are tolerance limits and everything was not always made 100% to an exact size, as long as it was in the tolerance limits it was perfectly fine and got built. I am a of a old timer compared to to you guys so I have probably seen different things over the years than how stuff is done today. Like those Rear Main Crankshaft Seals. Those ones that have the "Ears" on them are the same as pretty much any AMC ENGINE from about the mid 1960s and newer. And regardless of what a lot of people may or may not agree with, I have found personally that those seals are less prone to leaking if they are installed without any sealant, especially Silicone RTV , because it can mess with the bearing clearance. On occasion if I thought I needed sealant on one I would use aviation form a gasket liquid, and apply a very light coat of it .
That spring in the oil pump is the High Pressure reg spring. If you want more pressure add a shim washer at the bottom of the spring. Use Rotela oil for cam break in oil it has a good amount of zinc for lifter break in. Most Shell Rotella engine oils, including T6 5W-40 Full Synthetic Heavy Duty Diesel Engine Oil, contain approximately 1200 ppm of zinc which will benefit older and high-performance engines.
I can’t argue with you on the lack of quality on replacement lifters. My 95 K2500 5.7 ran 300K quiet as a mouse so when one head cracked I decided to spare no expense and purchased the “best “ parts that money could buy for a complete rebuild. What I have learned is that most liters regardless of brand are coming out of the same Wuhan factories. If I were to do it again I’d put the original lifters back in my engine even though they had 300K miles on them. They were in excellent condition.
Hey dex I had issues with cams as well. I ended up buying a reground through Delta cam 50 bucks. They also regrind lifters or sell you new ones. With their grind on them, you won't have any issues with your cam going flat.
Video like this just makes me want to keep my ole' Jeep. My XJ is #151 that rolled off the assembly line in Nov 1984. Got a 2.5L mated to a T4 (not AX4) from the factory. NP207J, AMC 35 rear axle, Dana 30 front axle. When they first started building these things, they just threw whatever parts they had around into em.
I agree 100% with reusing lifters if they aren't damaged. There's a much better chance aftermarket lifters quickly fail. I prefer a stone hone because it will reveal low spots. My Buick factory service manual suggests using an undersize bearing shell to adjust clearance.
I appreciate the hell outta these videos. My jeep I’ve been playing with busted the #2 piston. Tried for a in-frame, quick rebuild and found someone has already done so before me, not so well either. now I know I’m at the point of doing exactly this. Definitely gonna be paying my machinist well 🤣
Great video - sorry for the late comment/question.....new subscriber. I always like to see as much detail as possible but that's just me. Maybe you could do a "one time" video showing some step-by-step and let everyone know it has more detailed information on it. That way the experienced crowd knows what to expect. It looked like you removed the head with the intake still bolted on. As a newbie to Jeeps, I didn't realize that was a possibility. I'm now looking around for or a video with some more information on that. I need to check out possible lifter noises on my 4.0. Many thanks for taking the time to show your work! It really helps us "part timers". 🙂
You may be my new favorite channel. I’ve owned 15:48 my TJ for a little less than a year. Since it has the 4.0, I’m following you closely. One thing I did at my first oil change was to change was to switch to a Motorcraft FL-1A filter. Good idea????
Love this type stuff btw man , realtime :) . Ever thought of doing vid on types of steal and maybe how to go from a molten inget piece steal to creating a viking sword hehe
Hey Dex enjoy watching your videos; great content. I'm building a 93 4.0L and after washing the block it has surface rust on the Lifter bore. In this video you mention the same thing, how did you clean the rust off? Thank you in advance and keep making good videos.
Have an 01 wj with head gasket and piston slap surprise! What piston do you usually use in your refresh/rebuilds? Don’t need a hot rod just looking to get it moving again. Ps love the videos!
Hey ive been to your brothers machine shop, and bought a rebuilt 4.0 cherokee head off him a few years ago .got home put the head on my engine and the engine still runs like new .old one had a crack between the valves .i drove over 2 hours to buy it from bg ky .didnt get too stop at ur junkyard .are u still selling parts ? I love my cherokee had it over 12 years now .
Great video could you do one on like all the symptoms you can get from a head gasket or heater core my heater core clogged and caused pressure in my system and it pushed all the coolant out bypassed the heater core no more issues
i use the telescoping magnet tool that's $3.99 at harbor freight to pull out lifters. same diameter, can push or use magnet to pull. lifetime warranty on the tool as well. ...and yeah, fuck crank bearings. paid the shop that cleaned/honed my long block to do that. /96 ZJ
can you make a video about how youd set up a completely fresh beater cherokee? theres one sitting down the street from me thats just begging to hit rev limiter and bounce off trees
i have an 04 grand cherokee wish i had the $ to make it all new but better i like the body style but it kind of narrow though i wanna lower it and put wider wheels on it looking for ideas i wanna black out the wheels w/ baby moons w/ jeep logo?
You're a great educator and you're a mechanical smart fella. You know the danger in a garage by not protecting your feet with proper footwear so I have a question for you... why you acting so not smart? It's not going to stop me from watching but I would appreciate you being around "whole" for a long time to come. Don't try to tell us you can't afford steel toed shoes.
I agree, new parts from China have flaws, that's why the video of the nice jeep with rebuilt engines double firing on #1 cylinder could be bad cam lobe 😅
I run one on LPG (basically propane but with butane mixed in during winter) in the UK. It's perfectly do-able with the right kit but economically it depends totally on fuel prices in your area.
Magnet for lifters😂 I did a rebuild and reused my old lifters I took them all apart, cleaned them really good and reinstalled them They are really quiet I ordered aftermarket ones and after checking them out i decided not to use them, they looked cheap (they were melling) i just didnt trust them
reface the lifters. easy; White grease, you gotta be kidding, never use any grease that is not soluble in engine oil, cant tell what you used but Bob Glidden blew up many Fords using the wrong grease to assemble motors, then he learned, looks like way too much deck clearance but budget pistons would keep that top ring away from the ridge which if touching would be disastrous. That jeep head and piston likes tight deck clearance like .030 put sealer on front head bolt it goes to water
For the love of God, slow down the camera movements. You're good at explaining things, but when it's pointed at you then cut to a part and less than a half second back to you, it's hard to see and process what you're talking about.
