im currently enrolled in automotive college and the theoritical info i learned is actually reinforced with the knowledge and expertise you have shared to us and i am greatfull for that. thanks a million.
Thanks so much for all your video's,The 4.0L is a great motor.Seven jeeps since 1987 (87&2000 4.0's XJ's/91 MJ 4.0L/95-4cyl Wrangler/93-5.2L GC-Gas Hog/2000 4.7L-Strong-Best GC/05-5.7L Hemi GC-Very strong-Nice motor but watch out for valve seats falling out at 90-120K!! ask me why I know)An XJ 4.0L select-Trac Will always be My Keeper.Wrecked,stolen- Buy a another one.Still own 2000XJ,91MJ,05 GC Hemi.Looking forward to your 4.0 Cylinder head rebuild video.
I am in complete agreement everyone who has ever owned a jeep with a 4.0 loves this engine Im not really a 6 cylinder fan except for this one I love the 4.0 engines and I would buy a jeep with one of these any day of the week I have has 4 of them and I loved every one
A little bit of oil won’t hurt the timing chain but in the off chance that the plug backs itself out it would be very very bad. A little bit of blue medium threadlocker gives me peace of mind....
Had the machine shop tap the oil galleries on a buick V6 for a jeep back in the day. They tapped them ,but left them loose. Primed it, started it, and we got oil seeping from the bellhousing area. We pulled the transmission/transfercase and finished what they had started. No harm as it had good pressure. Also had to pull the front apart to check the other end. At least they gave me a case of oil, and few gaskets, and some cash back. After that I always checked.
Hey buddy I hope you and your love ones are doing ok My son and I are rebuilding a 96 4.0 the machine shop put the cam bearings in for us. My concern is the the 3rd bearing in with the two holes in it. Only one of them is lined up with a oil holes and the other is going to the bore no hole. Wondering if this in normal. Thanks
I am really loving these videos! I'm learning so much. I am having a 4.0L built right now. I was planning to keep it stock but you mention a different cam for greater low end torque. My rig is really being used off road for exploring & crawling. Will I get significant increase in torque if I change the cam? What do you recommend? (brand, lift, duration, etc.)
One question about the valve springs you recommend replacing them, when I've had valve job's done only had one set replaced but for the cost of em I'll have them done good video.
I love seeing you build the Jeep 4.0 six. Thanks for documenting it for others to benefit from. Any chance that you would consider building an AMC 360 or 401 V8? A lot of old AMC era Jeeps still running those motors.
Thanks for doing these videos. They helped immensely! However, I at the point of installing cam shaft position sensor shaft and oil pump. Your video jumps from putting the timing chain cover on, to an engine with the oil pan on and getting ready to put the head on. I would really like to see how you made sure the cam position sensor was lined up properly and what, if any gasket maker (RTV) did you use on the oil pan (in addition to the standard gasket). Those always leak! Also, did you video any of the head assembly with the lifter/push rod/rocker arm assembly? That would really help to see those. BTW - My engine is from a 2001 XJ. I had to replace a cracked head and they had overheated the engine, trashing the pistons. Thanks. Excellent job!
I liked the attention to the balancer. Me being a novice, my 1993 Jeep Grand Cherokee apparently had the "harmonic balancer" fail, per the Jeep dealer (at 160,000 miles). Are these the same parts? If so, how the heck does it just fail?
Love the videos, I’m currently about to undergo rebuilding my 87 Cherokee and these were a big help in giving me insight into what I’m about to get into for my first rebuild. I was just wondering if there was anyway you could post a link to the cam you were going to use here as well as point me in the right direction of a good master rebuild kit. Thank you for posting these videos, they really are extremely helpful and motivating for someone like myself. Thank you and have wonderful day!
Isn't there a retainer that keeps that camshaft from moving in and out of the block, or does that pin and spring do that? I think the 2000-2006 4.0 has a plate with a big hole and two bolt ears on it.
Love your informative videos. I'm getting ready to rebuild a 4.2 liter 258. Going with a GM HEI, MC2100 2 bbl and considering doing a 4.0 head swap. Question is what 4.0 head would be the best for this. Going to possibly add fuel injection later on but will use the carb for now. Also could you recommend a good mid-range cam for this engine? Something good for low end torque and higher RPM'S, best of both worlds I guess you could say.
The best head would probably be the Edelbrock aluminum head. However, those are extremely expensive. Also, if you get one, it is best to buy it bare and have a cylinder head expert precisely assemble it and use really good valves and other parts. There are replacement 4.0 cylinder heads made of iron that cost far less. They also have extra iron where the OEM heads are likely to crack. Some eBay stores even sell them with oversize valves installed, and some people even sell them with porting already done. I don't know your budget, so I can't give perfect advice.
I hope someone here can help me, I have a Cherokee with the 4.0 and I am currently trying to replace the head gasket. I have a similar block to what is shown in this video with coolant passages going between the block and the head around the head bolt holes but every head gasket I have bought and can find online does not have these holes. Does it not matter if those holes are covered by the gasket? The last time I did the gasket I had trouble bleeding coolant, I am not sure if that would be due to these passages being blocked
Question. What inspires you to train and instruct people? Why are you driven to make “shit right” in builds and general info? Hey thanks, ;;;it’s awesome that you do this. Get a cam card.
You being the more experienced person i have to ask. is it better to use ZDDP lube for cam break in or will the assembly lube you used work just fine? also building a 4.0.
Some cams will advertise "Compatible with stock computer" Some will advertise "Compatible with reprogrammed stock computer" and then some will advertise that major changes that are needed. On thing I have read is that with popular Ford engines, there are situations where some cams are compatible with all computerized engines, and others will only be compatible with mass air EFI. A "Mass Air" engine uses a sensor that directly measures how much air is entering the engine. Engine that aren't "Mass Air" use a pressure sensor in the intake manifold and then use charts that calculate incoming air by calculating how much vacuum the engine pulls. The Jeep 4.0 is not a Mass Air EFI engine, so it is more likely to be affected by changing cams.
Skyline Fever youre kinda wrong.. MAF on a ford is the way to go, not sure about jeeps but on a speed density ford truck your cam selection is very limited
I depends on how much a new engine costs and how much the rebuild in your situation costs. Some all new engines aren't that expensive, and some engines that are heavily damaged actually cost more than a 100% new engine.
@@Myvintageiron7512 guess we will never know for sure that place is good for nothing you want to learn go get a job and don’t take no for a answer be their every morning apply constantly call every day
Man thank you for this series. Watched it through a few times and rebuilt my 4.0 with ease, and I’m just a TH-cam mechanic 👍
Your explanation of the rocker ratio in relation to the lift was SO helpful
Where’s part 4 ? You got me hooked, but leaving me hanging.
I’m rebuilding my 4.2 for a 1982 Scrambler. Your videos are helpful, thanks for sharing
im currently enrolled in automotive college and the theoritical info i learned is actually reinforced with the knowledge and expertise you have shared to us and i am greatfull for that. thanks a million.
Thanks again for making these videos. I haven't seen anyone else explain this process anywhere near as well!
Great video and great learing experience! Love that cam thrust tensioner!
Thanks so much for all your video's,The 4.0L is a great motor.Seven jeeps since 1987 (87&2000 4.0's XJ's/91 MJ 4.0L/95-4cyl Wrangler/93-5.2L GC-Gas Hog/2000 4.7L-Strong-Best GC/05-5.7L Hemi GC-Very strong-Nice motor but watch out for valve seats falling out at 90-120K!! ask me why I know)An XJ 4.0L select-Trac Will always be My Keeper.Wrecked,stolen- Buy a another one.Still own 2000XJ,91MJ,05 GC Hemi.Looking forward to your 4.0 Cylinder head rebuild video.
I am in complete agreement everyone who has ever owned a jeep with a 4.0 loves this engine Im not really a 6 cylinder fan except for this one I love the 4.0 engines and I would buy a jeep with one of these any day of the week I have has 4 of them and I loved every one
@@Myvintageiron7512 I've got a 98 Jeep Grand Cherokee and I was thinking...is there no gasket on the timing cover?
I also own a 1991 MJ (: used to own a ‘94 xj with the 4L. Great engines those are
nice tip with the balancer and the timing cover .
Awesome video and great info! I always feel like I worked with a mechanic for a year after watching just one of your videos! Thanks!
A little bit of oil won’t hurt the timing chain but in the off chance that the plug backs itself out it would be very very bad. A little bit of blue medium threadlocker gives me peace of mind....
Had the machine shop tap the oil galleries on a buick V6 for a jeep back in the day. They tapped them ,but left them loose. Primed it, started it, and we got oil seeping from the bellhousing area. We pulled the transmission/transfercase and finished what they had started. No harm as it had good pressure. Also had to pull the front apart to check the other end. At least they gave me a case of oil, and few gaskets, and some cash back. After that I always checked.
Excellent video. from a mechanic. Thanks!
Learning all this soon I'm my auto class, can't wait to build up my 4.0 the trails are calling this summer, to the garage I go!
Thank man good vid .hope it has cooled off there. Its 90 one day then 47 the next in richadson tx
Love it. Looking forward to the 390 as I have one sitting in a truck outside and might be my first project, just need a shop or good weather
Wish I could afford to send you my 348 big block.. I would love to watch my engine being built like this
where is part 4!! I have to rebuild mine and the info you give is awesome
I can't fins a head still looking
cool beans I'll stay tuned!
I've never checked a cam, always just jammed em in and went
Hey buddy
I hope you and your love ones are doing ok
My son and I are rebuilding a 96 4.0 the machine shop put the cam bearings in for us. My concern is the the 3rd bearing in with the two holes in it. Only one of them is lined up with a oil holes and the other is going to the bore no hole. Wondering if this in normal.
Thanks
thank god so much better then watching a DIYer . its nice to learn something
Great videos and a lot of useful information that I forgot lol. Thank you
Appreciate your time,thank you!
I am really loving these videos! I'm learning so much. I am having a 4.0L built right now. I was planning to keep it stock but you mention a different cam for greater low end torque. My rig is really being used off road for exploring & crawling. Will I get significant increase in torque if I change the cam? What do you recommend? (brand, lift, duration, etc.)
Where's part 4 ... you got me hooked. C'mon man!!!
I love this series.
One question about the valve springs you recommend replacing them, when I've had valve job's done only had one set replaced but for the cost of em I'll have them done good video.
I love seeing you build the Jeep 4.0 six. Thanks for documenting it for others to benefit from.
Any chance that you would consider building an AMC 360 or 401 V8? A lot of old AMC era Jeeps still running those motors.
Thanks for doing these videos. They helped immensely! However, I at the point of installing cam shaft position sensor shaft and oil pump. Your video jumps from putting the timing chain cover on, to an engine with the oil pan on and getting ready to put the head on. I would really like to see how you made sure the cam position sensor was lined up properly and what, if any gasket maker (RTV) did you use on the oil pan (in addition to the standard gasket). Those always leak!
Also, did you video any of the head assembly with the lifter/push rod/rocker arm assembly? That would really help to see those.
BTW - My engine is from a 2001 XJ. I had to replace a cracked head and they had overheated the engine, trashing the pistons. Thanks. Excellent job!
I liked the attention to the balancer. Me being a novice, my 1993 Jeep Grand Cherokee apparently had the "harmonic balancer" fail, per the Jeep dealer (at 160,000 miles). Are these the same parts? If so, how the heck does it just fail?
Is flat tappet cam only option for a jeep 4.0 head? I recall you stated you don’t like them.
I didn't see if there is a gasket for the timing chain cover?
Great Video!
Love the videos, I’m currently about to undergo rebuilding my 87 Cherokee and these were a big help in giving me insight into what I’m about to get into for my first rebuild. I was just wondering if there was anyway you could post a link to the cam you were going to use here as well as point me in the right direction of a good master rebuild kit. Thank you for posting these videos, they really are extremely helpful and motivating for someone like myself. Thank you and have wonderful day!
Isn't there a retainer that keeps that camshaft from moving in and out of the block, or does that pin and spring do that? I think the 2000-2006 4.0 has a plate with a big hole and two bolt ears on it.
Yup, doing mine right now 02
Thank you so much for these videos
Good video 📹 👍 what's the cost $$$ for that same rebuild?
What was the mileage on this 4.0L before the rebuild? Thanks
Saludos . Desde España👍
Love your informative videos. I'm getting ready to rebuild a 4.2 liter 258. Going with a GM HEI, MC2100 2 bbl and considering doing a 4.0 head swap. Question is what 4.0 head would be the best for this. Going to possibly add fuel injection later on but will use the carb for now. Also could you recommend a good mid-range cam for this engine? Something good for low end torque and higher RPM'S, best of both worlds I guess you could say.
The best head would probably be the Edelbrock aluminum head. However, those are extremely expensive. Also, if you get one, it is best to buy it bare and have a cylinder head expert precisely assemble it and use really good valves and other parts. There are replacement 4.0 cylinder heads made of iron that cost far less. They also have extra iron where the OEM heads are likely to crack. Some eBay stores even sell them with oversize valves installed, and some people even sell them with porting already done.
I don't know your budget, so I can't give perfect advice.
Looking forward to your next video. I've mised you!
Yea still looking for a head ours is cracked
Do you still teach at universal technical institute?
Is that the Jeep 4.0 high output motor
Id love to do an engine rebuild.
go for it
Myvintageiron7512 i enjoyed the video. Thank you.
I hope someone here can help me, I have a Cherokee with the 4.0 and I am currently trying to replace the head gasket. I have a similar block to what is shown in this video with coolant passages going between the block and the head around the head bolt holes but every head gasket I have bought and can find online does not have these holes. Does it not matter if those holes are covered by the gasket? The last time I did the gasket I had trouble bleeding coolant, I am not sure if that would be due to these passages being blocked
compression on the cam is in the 180 position from the dot to dot is that correct?
Great job ... so were is your shop at i would like some work done in xj
So what your saying is we need to use some lube
Or they could put the wrong cam card in?
Where is the rest of the build? I cant seem to find it
Use blue locktite on cam bolt..
I am rebuilding a 2003 4.0 and dont remember an oil slinger when I disassembled. Should a 2003 4.0 have a slinger?
My 2001 4.0 did not have one either!
Could a person make a good living rebuilding old Jeep motors? This is my dream wondering if it is possible
Question. What inspires you to train and instruct people? Why are you driven to make “shit right” in builds and general info? Hey thanks, ;;;it’s awesome that you do this. Get a cam card.
What's a fair price to rebuild a 4.0 Jeep engine to this level of detail?
So I don't need to use a timing wheel like on other engines
Did you sell the rebuilt 4.0…😂🍷
You being the more experienced person i have to ask. is it better to use ZDDP lube for cam break in or will the assembly lube you used work just fine? also building a 4.0.
ZDDP lube is a good idea but you also need to run the correct breakin oil
Myvintageiron7512 what break in oil would you recommend. I cant see in the video.
Joe Gibbs BR.
How much does all this cost
Did you have to adjust the computer due to the cam being larger?
possibly not sure yet
Some cams will advertise "Compatible with stock computer"
Some will advertise "Compatible with reprogrammed stock computer"
and then some will advertise that major changes that are needed.
On thing I have read is that with popular Ford engines, there are situations where some cams are compatible with all computerized engines, and others will only be compatible with mass air EFI. A "Mass Air" engine uses a sensor that directly measures how much air is entering the engine. Engine that aren't "Mass Air" use a pressure sensor in the intake manifold and then use charts that calculate incoming air by calculating how much vacuum the engine pulls.
The Jeep 4.0 is not a Mass Air EFI engine, so it is more likely to be affected by changing cams.
Skyline Fever youre kinda wrong.. MAF on a ford is the way to go, not sure about jeeps but on a speed density ford truck your cam selection is very limited
I did say that MAF is better than speed density.
Skyline Fever sorry mad read that last little tid bit wrong, I thought you said it was a MAF engine lol fail
Your cam card is correct. You only have 3 digits to work with. 0.4096 rounds to 0.410. Hence... your measurements were dead on.
Hey man, I get what you do. It is awesome and thanks so much... this from a motor head. Right?
Do any of the Jeep Wrangler TJ's come with this engine?
I think they used the 4.0 from the early 1990s up until about 2005.
What happened to this engine originally to require a rebuild if low mileage?
over heated
Oh okay. Anyway love the engine rebuild videos and keep up the good work! You definitely have a niche here on youtube with these
Is it better to rebuild or just to drop a new engine in?
I depends on how much a new engine costs and how much the rebuild in your situation costs. Some all new engines aren't that expensive, and some engines that are heavily damaged actually cost more than a 100% new engine.
Do you have a shop in AZ?
Yep
What do you charge to build this motor for someone?
$2800.00
Next pt?
Looks a bit like an australian falcon 6 motor
Would you be available to build a Jeep 4.0 for a really good customer who is happy to pay for all the perfect details? Hit me back if you can.
Your calculated lift of 0.4096" rounds of to 0.410", with three significant figures. Just sayin'...
I would like to have you build my engine is there a way I could reach you?
facebook message me at myvintageiron7512
Tom hanks wants his 4.0 back
Al Senzick Wilson! It’s suppose to be 1995 but it’s a 97+ model.
i got the math and didnt need a calculator
Wonder how much this guy got paid for wearing the tshirt modern advertisement at its best
not 1 cent
@@Myvintageiron7512 guess we will never know for sure that place is good for nothing you want to learn go get a job and don’t take no for a answer be their every morning apply constantly call every day