Not jeep but I had an '82 Ford F150 that had an I6 300 in it. Man I loved that engine. Bought it brand new April 1982. Put 238K on it over twenty years at work as carpenter. One HELLUVA engine. >>>zero
My local engine builder says the same thing, the Jeep straight 6 engines might be the best ever. Nowadays guys are making over 1000 HP with these motors using aftermarket ECU's.
Hey man, thanks for seeing this build through, it's definitely very appreciated. I bought my second Jeep a little over a year ago and it came with a pretty severe crack from water jacket to water jacket (and beyond) between 3 & 4. Was just going to replace the head, but I ended up coming across someone selling a complete motor for $100. The head is an 0630 (96-99) but the block is a 00+. I went ahead and pulled the head to inspect the pistons, rotation, valvetrain, head, etc. I replaced all the gaskets and seals while it was apart, along with the timing set and a high-flow oil pump. It was my first time ever getting that far into an engine and "refreshing" one. The head was either recently rebuilt or had very little mileage on it because it had such little oil staining on it, it was barely an amber color instead of the coffee colored dark brown a high-mileage unit would have. Unfortunately, after a few months of driving it, there's a knock in the mid-RPM range (about 2000+) but only on light throttle and decel. Thankfully, I saved the old short block and I'm going to be performing my first engine rebuild soon. I said all that to say, this series has been extremely helpful and is making me feel a lot more confident in what I'm about to do. I'm a mechanic at a shop in Kentucky and I wish engine rebuilds was something we did here... unfortunately that's not the case. I've been reading "Jeep 4.0 Engines - How to Rebuild and Modify" by Larry Shepard also. Between your series and the builder's guide here, I'm feeling much better about the rebuild. Seriously can't thank you enough!
I'm glad I could help; I would encourage you to go for it. The main thing to remember is just take your time and make sure not to skip anything the 4.0 is fairly easy to rebuild find yourself a reputable machine shop and have the clean and inspect the block, and or bore and hone it if necessary. they can also be a big help sourcing the correct parts. There is actually quite a few upgraded parts available for the 4.0 these are fantastic engines that make great torque and provide very long life and good reliability, keep in mind they do have a tendency to run hot(I ran mine at 210 to 215 with no problems) make sure you follow the cooling system bleeding process when flushing of filling the cooling system for the first time they have a huge bubble up top in the cylinder head and upper block. in fact this issue is the most common reason for the head cracking, I can't tell you how many of these heads I took in at the shop that were cracked. and the customer told me the overheating started after they drained and flushed the coolant, when they refilled the system they did not properly bleed it. the result is instant overheating and a 95% chance of a cracked head
And I watched the whole series and now I feel a lot more confident in this. My Grand cherokee 4.0 either dropped a lifter or broke a skirt so trying to get that rebuilt if its a lifter thattl be a lot nicer lol.
Thru a curious process, a 94 XJ with superb body, interior came to my hand with a blown engine. I replaced that unit, with a few problems but find, I really like the XJ and like the power of the 4.0 for all the reasons you mention. Why this post is so useful, is that the unit with blown head gasket, hi miles, is awaiting refit to all the components you so managed in the series. I feel grateful and lucky to have the benefit of that worksmanship, so well crafted and with such great assembly guidance. A semi retired tech in Wa state. M.
I take note several viewers are interested in a known rebuildable 4.0. So I have an extra block, head, t coverter, transmission, transfer case. mmcgary(at) gmail At teardown inspection, found head gasket leak thru at center 3 each pistons and slight wear bar as high miles to piston bore. Absolutely normal and within all spec for refit/rebuild. 400 for the lot and truck ship as pallet pick up buyer pays additional sum*Wa State. M
96 and newer Jeep 4.0 engines have dowel pins the 0630 and 0331 heads have holes to align on the dowels also. One other thing is older 4.0 heads will fit the newer blocks and vice versa. I built a 2001 4.0 that is turbocharged and makes over 400 hp and 500 ft/lbs of torque.
@@benjiduzick-petrell6877 It's a totally stock bottom end except for the King rod and main bearings. It does have an Edelbrock head with some porting/chamber work and a mild Comp cam. You can make the same power with the stock heads and cam but it will take about 15 psi of boost. I am only running 12psi.
I dig this channel big time. It went up a notch today. Having ms vintage iron on here is very cool. You a blessed man dude. Ain't one woman in a thousand have any interest in this kind of work. Thanks for ALL the vids over the years to btw.
Been looking at many videos. Yours is one of the better ones. Learning lots, getting mentally ready. First rebuild attempt. 99 XJ 4.0 235k miles.. Recently started running rough. Got check engine light. Code: p0300, p0303, p0304. Did a compression test dry and wet. Brought up to operating temp, disconnected fuel pump relay let it run until it turns off. Hold full throttle, turn engine 6 revolutions.. #1 (dry) 160 #2 (dry) 165 #3 (dry) 50 (wet) 60 #4 (dry) 50 (wet) 60 #5 (dry) 165 #6 (dry) 160 Going to do leak down. Waiting for tester (rental) at auto zone. Hopefully it's only head gasket. No oil mix with coolant. Thank goodness. Reached out to Russ Pottenger for stroker info. Waiting for reply with details. Thanks for posting...
look for cracking on my 2006 the driver's side is bad ect. ask if you want me to answer you. ps i 🤔i have those codes aka my dash is a crismiss tree 🌲right now
@@richardprice5978 In my case, the head gasket failed. Leak down test passed air between cylinder 3 and 4. Just had cylinder head checked. Replaced head gasket. Wasn't to hard to complete.
@@05glisedan did yours warp? because 2006 is head and block its so bad the water pump doesn't really seal all that well ps. got the same problems as you and some more plus valve trian issues as well
@@richardprice5978 per machine shop, very slight warp. Not much was shaved. Otherwise, valvetrain was reused. Sorry to hear about you cylinder head. Luckily, lots of 4.0 at the junkyard. Mainly off wj's...
@@05glisedan thanks 👍right /for/now im demo-derbying/quite caring the engine tell it's 💯dead 💀( this time vs the other 💀ones i played nice-e-nice with ) as the block+head+other parts are toasted+cracked ( 3th try🤬 with 4.0L so no more thanks 😉🤠. im tried of using earphone's to block out the shrill 🐷 of it idling ect. ). hopefully it will get a 2007-up smaller sized ford-V-8+automatic-6+speed swap for better on road manners as the 2006 LWB is a nice jeep just not into the current combo
Lookin forward to 351 clevor. Have two ford vans with 351, a 92 E150 drove 20 years at work and 94 E350 in 2019. Retired 2020 so they're just empty run arounds now mostly. Much as I love the 300 I like the 351 better because it has some top end to it. Gotta be in the top 10 best gas engines ever made. I LOVE pushrod motors.
Had a 91, great engine but the lower end bearing went out before the warranty expired. They also upgraded the head gasket. The first gasket they used after replacing the rebuild lower end had oil weeping onto the ousting of the block, just enough to see it
the 2006 4.0L i drive had a leak on the valve cover gasket oil leak oe engine 2nd one lost the valve cover and head gasket 3nd cracked and warped head and block + water pump+head gasket and im not starting with the camshaft and lifter's problems i have ran into in under 150K miles
@@HypocriticYT yep. but the 2006 300 v6-2.7 has been good to us ( 140K+ but got hit this year and is a teen/sold/seller car now but not ok 👍for daily use ) but it sounds like its going to be replaced with a daily driver BEV more that likely a f150 lighting as chrysler+others doesn't make a good ev yet for big guys. i have a G2 charger g-code and im happy 😃with it for the most part so 🤷♂ ( got joy ride/chopped in 2016-22 so im rebuilding and resomoding it now ) hit and a miss
Very nice to meet Mrs. Vintageiron!! And she knows her stuff!! Lucky man you are sir!! Thanks for the video!! Excited to see the Clev-or come to life!! Any word on the 289-302 build finish up? ALWAYS good info as always! Peace!!
wow./ im so lucky... I just found this video today!!!! watch the first one an hour ago.. and now I discover it literally took you years to make it come together. awesome you didn't give up :D
That engine is the AMC straight 6 and though I was never an AMC fan they had some very impressive engines. Chrysler got the engine when they bought JEEP and developed it in preference to their own slant 6. I am not aware of the detail differences between the AMC and the later Jeep builds. Ever here of Barney Navarro? He was a hotrodder in Glendale California. In 1967 he built one of these for an Indy car and it almost made the race in 1969 despite being in a 5 year old chassis that wasn't very good when new. He said he dynoed the engine at 550 hp with the turbocharger and reduced displacement of 164 CID for Indy. Seven main bearings and a great straight six. Along with the Buick V6 it continued on from the early sixties and was still top of it's class till the manufactures decided that all the tooling was worn out and killed the designs in the 2000's. Maybe it hurt their ego that an engine designed in the 1960's was still better than their more recent stuff.
no the 4.0L i drive is a 1920's engine ( as a 30's continental engine it was ok for the day )( that dos have some flaws with manufacturing and design/factory newer mods ) that doesn't play well with automatic transmissions and is a bug bomb aka cant pass EPA in 2004 ( jeep should have killed it in 1971 and was but change its mind 😆😜 ) without cheating software and at that doesn't work well with 2001 EFI let alone 2018 hardware and software
the buick v6 3100 was ok in 2008ish ( drove a le cross with one ) but a little dated could have gmc breath new life in to it yes as the SBC-v8 ( and the v6 is a baby 👶🍼of so chopping off 2 cylinders off a LT5 would have worked too ) morfed into the LT5 8v ect. but it had other people and engine platform's competing for the same engine bays ( jeep actually liked it and used it for a time in a CJ- ) and lost. my guess is passing EPA testing would have been more expensive and time consuming vs a newer designs or cheating and using a existing engine in there line up say a v8
Wow - the wife helps in the garage? super cool. So when you argue about paint its blizzard white or metallic silver and not egg shell or cream color lol
Why are these engines prone to piston slap? I have one that in cold start does not make any noise and when it warms up the slap piston starts to make noise and also when I rev it the top of the engine makes noise but it only happens when the engine is very hot (not overheating) only 2hrs of driving or something like that Your work is awesome new subscriber!
I have a 92 YJ which I will be rebuilding the 4.0 L now that I've seen all of the episodes. I did it all in the last week, so I didn't have to wait like some others. Sorry guys. Now, if you could answer a side question for me. I want to build a 350/5.7L for my boat. I am aware of many subtle differences between automotive and marine but all of the big brands deal directly with GM and Ford for the most part. At least in their gas engines. What I would like to know is if there are any improvements one could do to my build to make it more suitable to pulling things as I intend to build a small workboat using a gas engine. Towing would be the kind of work. Also, I have a Harley and wonder if you've ever done any V Twin engine rebuilds for Harley or ? Thanks.
So having resurfaced the head and new valve seats cut, did you need to alter the length of the push rods. How do you determine this after the head machining, to ensure your push rods give correct rocker arm valve clearance? As your rocker arms are non adjustable on a Jeep 4.0. If you know please share this knowledge with those of us who don't
i spoke with crane summer 2019 and they were working on roller cams for the 4.0l but comp bought them and tech support isn't aware of them working on the project..
keep in mind these engines were originally designed in the early 60's by AMC and the 4.0 was AMC designed and built just before chrysler took them over. Excellent engines.
I built a 4.0 using your videos. the camshaft i used was stock .265 lift, paper work stated rocker-arm ratio was only 1.5 not 1.6 giving me .397 I think the camshaft changed after 1995 . I see the engine you're building doesn't have a girdle i think that makes it pre 1996, can you check the lift on that engine just for fun
I love your videos!!! I can tell you're very good at what you do and I was wondering if you could give me some advice on something? I currently have a 2000 xj 4.0 with a cracked head, it holds around 13 psi of oil pressure at hot idle (verified by mechanical gauge) but there are no knocks yet. Is it worth just replacing the head?? Or should I be looking at a whole new engine or atleast a rebuild? There is around 140,000 miles on the engine. Also do you have any recommendations for either option?
junk it. the 4.0L auto 2006 jeep i drive has gone though 3 engine's/rebuilds 120k Mi ish on the clock and starting to have problems with the OG transmission. my understanding is the 4.0 started out life as a 1920's gmc/continental tractors-ish engine ( AMC somehow got ) ( and at least with the other owners i have met said that there jeep gets terrible MPG and i my case is under 14-max ) and was ok for the time with a stick mag+carb, the transmission is 1960-70's car unit and both are ok 👍by themselves, but as a combo junk 👎, i feel the LSX ( first pick for gasoline ) or 3G/v6 mopar or diesel ( or ford coyote for for nuts as my family member is, just not my first pick as parts as more $$ ) engine swap is a better deal for automatics ( and well your at it grab the newer overdrive transmission aka 10L80E and atles T-caes ) and mostly a d&d jeep
the 2006 rubicon LWB has a cracked block and head right now and a cam/lifter thats bad/threatening to lock up the engine aka it drive's but it's junky 🤬🤬
If you look at all of my comments you will see I said exactly that. To be even more specific the 87-95 do not have dowels the 96-06 have dowels. His block and head both have spots for dowels but he didn't have them in it.
I have a weird question in doing a lifter job on the same engine for the first time are the lifters supposed to be spongy or hard to where they don't move
Hey it’s probably a long shot but I’m looking to get a 4.0 rebuild. My local guys aren’t nearly as meticulous as you and this build. What is your contact information?
What is the new head casting #? If anyone wants to know head casting and respective flow numbers for each head. www.bigdoggarage.com/jeep-4.0-head-numbers.html
![We Test 5 Jeep Cylinder Heads [How Much is Porting Worth?]](/img/n.gif)
I just found this build series and watched them all without having to wait three years for the final installment! WOOOHOOO!!!
Haha me too 😅
It’s a blessing for spouses to have shared interests other than the children because one day the children are grown and gone.
Not jeep but I had an '82 Ford F150 that had an I6 300 in it. Man I loved that engine. Bought it brand new April 1982. Put 238K on it over twenty years at work as carpenter. One HELLUVA engine. >>>zero
So cool to see a woman in the shop handling business! You're a lucky man,
Yes I am!
SWEET!!! MRS Iron relay knows how to do the particular machine work! YOU are BLESSED!
Holy shit I've been waiting on this for THREE YEARS MAN! 😂
Same here!
@@PatrickInCayman i was starting to 🤔 if i had that engine in a 2006 nope thankfully 😅🙏 ,some other POS
She is a very cool lady! You are a lucky man! God bless you both!
You and wifey are a beautiful couple! I love all your videos, its a refresher course of what my Dad taught me as a younger man. Thank you!
My absolute favorite channel!! You two make a great team, and I'm sure a very healthy marriage. Stay blessed!..
Since Mrs. Vintage Iron is a part of your work I am so glad you finally put her on camera too !!!!!!!!
My local engine builder says the same thing, the Jeep straight 6 engines might be the best ever. Nowadays guys are making over 1000 HP with these motors using aftermarket ECU's.
Hey man, thanks for seeing this build through, it's definitely very appreciated. I bought my second Jeep a little over a year ago and it came with a pretty severe crack from water jacket to water jacket (and beyond) between 3 & 4. Was just going to replace the head, but I ended up coming across someone selling a complete motor for $100. The head is an 0630 (96-99) but the block is a 00+. I went ahead and pulled the head to inspect the pistons, rotation, valvetrain, head, etc. I replaced all the gaskets and seals while it was apart, along with the timing set and a high-flow oil pump. It was my first time ever getting that far into an engine and "refreshing" one. The head was either recently rebuilt or had very little mileage on it because it had such little oil staining on it, it was barely an amber color instead of the coffee colored dark brown a high-mileage unit would have. Unfortunately, after a few months of driving it, there's a knock in the mid-RPM range (about 2000+) but only on light throttle and decel. Thankfully, I saved the old short block and I'm going to be performing my first engine rebuild soon.
I said all that to say, this series has been extremely helpful and is making me feel a lot more confident in what I'm about to do. I'm a mechanic at a shop in Kentucky and I wish engine rebuilds was something we did here... unfortunately that's not the case. I've been reading "Jeep 4.0 Engines - How to Rebuild and Modify" by Larry Shepard also. Between your series and the builder's guide here, I'm feeling much better about the rebuild.
Seriously can't thank you enough!
I'm glad I could help; I would encourage you to go for it. The main thing to remember is just take your time and make sure not to skip anything the 4.0 is fairly easy to rebuild find yourself a reputable machine shop and have the clean and inspect the block, and or bore and hone it if necessary.
they can also be a big help sourcing the correct parts.
There is actually quite a few upgraded parts available
for the 4.0 these are fantastic engines that make great torque and provide very long life and good reliability, keep in mind they do have a tendency to run hot(I ran mine at 210 to 215 with no problems) make sure you follow the cooling system bleeding process when flushing of filling the cooling system for the first time they have a huge bubble up top in the cylinder head and upper block. in fact this issue is the most common reason for the head cracking, I can't tell you how many of these heads I took in at the shop that were cracked.
and the customer told me the overheating started after they drained and flushed the coolant, when they refilled the system they did not properly bleed it.
the result is instant overheating and a 95% chance of a cracked head
And I watched the whole series and now I feel a lot more confident in this. My Grand cherokee 4.0 either dropped a lifter or broke a skirt so trying to get that rebuilt if its a lifter thattl be a lot nicer lol.
One Lucky guy Sir to have a Lady that shares in your interest.. cant wait for Part 8 of Pontiac 350 rebuild. God Bless.
Thru a curious process, a 94 XJ with superb body, interior came to my hand with a blown engine. I replaced that unit, with a few problems but find, I really like the XJ and like the power of the 4.0 for all the reasons you mention. Why this post is so useful, is that the unit with blown head gasket, hi miles, is awaiting refit to all the components you so managed in the series. I feel grateful and lucky to have the benefit of that worksmanship, so well crafted and with such great assembly guidance. A semi retired tech in Wa state. M.
I take note several viewers are interested in a known rebuildable 4.0. So I have an extra block, head, t coverter, transmission, transfer case.
mmcgary(at) gmail At teardown inspection, found head gasket leak thru at center 3 each pistons and slight wear bar as high miles to piston bore.
Absolutely normal and within all spec for refit/rebuild. 400 for the lot and truck ship as pallet pick up buyer pays additional sum*Wa State. M
Holy shit, you've got the wife cutting valve couterbores? Sorry bud, don't bother with the lottery, you've already won it. What a lady!
96 and newer Jeep 4.0 engines have dowel pins the 0630 and 0331 heads have holes to align on the dowels also. One other thing is older 4.0 heads will fit the newer blocks and vice versa. I built a 2001 4.0 that is turbocharged and makes over 400 hp and 500 ft/lbs of torque.
Did you do anything to the engine prior to adding the turbocharger? If so, would you add what upgrades you did the the base engine?
@@benjiduzick-petrell6877 It's a totally stock bottom end except for the King rod and main bearings. It does have an Edelbrock head with some porting/chamber work and a mild Comp cam. You can make the same power with the stock heads and cam but it will take about 15 psi of boost. I am only running 12psi.
@@jeremymardlin5381 what type of ECU management are you working with?
@@benjiduzick-petrell6877 Stock 1801 ecm returned using HP Tuners.
@@jeremymardlin5381 What tuner would you suggest?
I dig this channel big time. It went up a notch today. Having ms vintage iron on here is very cool. You a blessed man dude. Ain't one woman in a thousand have any interest in this kind of work. Thanks for ALL the vids over the years to btw.
My wife cut them valves.......my brain is experiencing an error but damn that’s an awesome statement to make congratulations
Great to see the final video. I'm in the process of rebuilding a 4.0 and am using your video for guidance. Thanks for posting.
That coolant on the bolts must transfer cooling up its shaft.
I just found your channel and this series of videos. Outstanding series and a great inspiration to me to want to build my own Jeep 4.0 Liter engine.
Been looking at many videos. Yours is one of the better ones. Learning lots, getting mentally ready. First rebuild attempt.
99 XJ 4.0 235k miles..
Recently started running rough. Got check engine light. Code: p0300, p0303, p0304.
Did a compression test dry and wet. Brought up to operating temp, disconnected fuel pump relay let it run until it turns off. Hold full throttle, turn engine 6 revolutions..
#1 (dry) 160
#2 (dry) 165
#3 (dry) 50 (wet) 60
#4 (dry) 50 (wet) 60
#5 (dry) 165
#6 (dry) 160
Going to do leak down. Waiting for tester (rental) at auto zone.
Hopefully it's only head gasket.
No oil mix with coolant. Thank goodness.
Reached out to Russ Pottenger for stroker info. Waiting for reply with details. Thanks for posting...
look for cracking on my 2006 the driver's side is bad ect. ask if you want me to answer you. ps i 🤔i have those codes aka my dash is a crismiss tree 🌲right now
@@richardprice5978 In my case, the head gasket failed. Leak down test passed air between cylinder 3 and 4. Just had cylinder head checked. Replaced head gasket. Wasn't to hard to complete.
@@05glisedan did yours warp? because 2006 is head and block its so bad the water pump doesn't really seal all that well
ps. got the same problems as you and some more plus valve trian issues as well
@@richardprice5978 per machine shop, very slight warp. Not much was shaved. Otherwise, valvetrain was reused. Sorry to hear about you cylinder head. Luckily, lots of 4.0 at the junkyard. Mainly off wj's...
@@05glisedan thanks 👍right /for/now im demo-derbying/quite caring the engine tell it's 💯dead 💀( this time vs the other 💀ones i played nice-e-nice with ) as the block+head+other parts are toasted+cracked ( 3th try🤬 with 4.0L so no more thanks 😉🤠. im tried of using earphone's to block out the shrill 🐷 of it idling ect. ). hopefully it will get a 2007-up smaller sized ford-V-8+automatic-6+speed swap for better on road manners as the 2006 LWB is a nice jeep just not into the current combo
The 2 head bolts with the unthreaded studs should be one in from the ends. They locate the factory style newer 1 piece rubber valve cover gasket.
Lookin forward to 351 clevor. Have two ford vans with 351, a 92 E150 drove 20 years at work and 94 E350 in 2019. Retired 2020 so they're just empty run arounds now mostly. Much as I love the 300 I like the 351 better because it has some top end to it. Gotta be in the top 10 best gas engines ever made. I LOVE pushrod motors.
Awesome....thanks Mr and Mrs V.I.
WOW! Who gets the wife to help seat valves?! Congrats! Has to make for a great relationship. Always enjoy your presentations.
Only the front bolt outside of the valve cover goes into the coolant passage. The rest of the head bolt holes are blind.
Yea but why not just seal em all in just in case
The family that works together. That's cool ! 😊
For a long life engine I'd prefer the block and head made out of the same material. Due to the heat cycles of expansion between different metals.
Had a 91, great engine but the lower end bearing went out before the warranty expired. They also upgraded the head gasket. The first gasket they used after replacing the rebuild lower end had oil weeping onto the ousting of the block, just enough to see it
the 2006 4.0L i drive had a leak on the valve cover gasket oil leak oe engine 2nd one lost the valve cover and head gasket 3nd cracked and warped head and block + water pump+head gasket and im not starting with the camshaft and lifter's problems i have ran into in under 150K miles
@@richardprice5978 Chrysler quality control
@@HypocriticYT yep. but the 2006 300 v6-2.7 has been good to us ( 140K+ but got hit this year and is a teen/sold/seller car now but not ok 👍for daily use ) but it sounds like its going to be replaced with a daily driver BEV more that likely a f150 lighting as chrysler+others doesn't make a good ev yet for big guys. i have a G2 charger g-code and im happy 😃with it for the most part so 🤷♂ ( got joy ride/chopped in 2016-22 so im rebuilding and resomoding it now ) hit and a miss
@@richardprice5978 crossing my fingers with my 2008 p/u truck with the 5.7 hemi. So far only the water pump let go Christmas day a few years back..
Very nice to meet Mrs. Vintageiron!! And she knows her stuff!! Lucky man you are sir!! Thanks for the video!!
Excited to see the Clev-or come to life!! Any word on the 289-302 build finish up?
ALWAYS good info as always! Peace!!
just talkes to Charlie yesterday the 289 just need trans lines and some wireing in order to fire
@@Myvintageiron7512 fantastic!! Hope to see it running down the road! Will you be doing any dyno runs?
wow./ im so lucky... I just found this video today!!!! watch the first one an hour ago.. and now I discover it literally took you years to make it come together. awesome you didn't give up :D
Hope you enjoyed it!
Looks like you have a 0630 head there. It has the dowel holes and looks like a big exhaust ports.
Only one head bolt needs sealant
Great video! Can you explain how to"burp"the engine to prevent cracking?
Mrs Vintage is great!
Definitely good tech tips!
Thanks for showing some six bangers! Too much V8 content out there sometimes🤓👍
That engine is the AMC straight 6 and though I was never an AMC fan they had some very impressive engines. Chrysler got the engine when they bought JEEP and developed it in preference to their own slant 6. I am not aware of the detail differences between the AMC and the later Jeep builds. Ever here of Barney Navarro? He was a hotrodder in Glendale California. In 1967 he built one of these for an Indy car and it almost made the race in 1969 despite being in a 5 year old chassis that wasn't very good when new. He said he dynoed the engine at 550 hp with the turbocharger and reduced displacement of 164 CID for Indy. Seven main bearings and a great straight six. Along with the Buick V6 it continued on from the early sixties and was still top of it's class till the manufactures decided that all the tooling was worn out and killed the designs in the 2000's. Maybe it hurt their ego that an engine designed in the 1960's was still better than their more recent stuff.
no the 4.0L i drive is a 1920's engine ( as a 30's continental engine it was ok for the day )( that dos have some flaws with manufacturing and design/factory newer mods ) that doesn't play well with automatic transmissions and is a bug bomb aka cant pass EPA in 2004 ( jeep should have killed it in 1971 and was but change its mind 😆😜 ) without cheating software and at that doesn't work well with 2001 EFI let alone 2018 hardware and software
the buick v6 3100 was ok in 2008ish ( drove a le cross with one ) but a little dated could have gmc breath new life in to it yes as the SBC-v8 ( and the v6 is a baby 👶🍼of so chopping off 2 cylinders off a LT5 would have worked too ) morfed into the LT5 8v ect. but it had other people and engine platform's competing for the same engine bays ( jeep actually liked it and used it for a time in a CJ- ) and lost. my guess is passing EPA testing would have been more expensive and time consuming vs a newer designs or cheating and using a existing engine in there line up say a v8
GOOD FOR YOU MAN !!
You lucky bastard. :D
Wow - the wife helps in the garage? super cool. So when you argue about paint its blizzard white or metallic silver and not egg shell or cream color lol
she wins
Why are these engines prone to piston slap? I have one that in cold start does not make any noise and when it warms up the slap piston starts to make noise and also when I rev it the top of the engine makes noise
but it only happens when the engine is very hot (not overheating) only 2hrs of driving or something like that
Your work is awesome new subscriber!
I wish I had something to put this engine in.
I have a 92 YJ which I will be rebuilding the 4.0 L now that I've seen all of the episodes. I did it all in the last week, so I didn't have to wait like some others. Sorry guys. Now, if you could answer a side question for me. I want to build a 350/5.7L for my boat. I am aware of many subtle differences between automotive and marine but all of the big brands deal directly with GM and Ford for the most part. At least in their gas engines. What I would like to know is if there are any improvements one could do to my build to make it more suitable to pulling things as I intend to build a small workboat using a gas engine. Towing would be the kind of work. Also, I have a Harley and wonder if you've ever done any V Twin engine rebuilds for Harley or ? Thanks.
So having resurfaced the head and new valve seats cut, did you need to alter the length of the push rods.
How do you determine this after the head machining, to ensure your push rods give correct rocker arm valve clearance?
As your rocker arms are non adjustable on a Jeep 4.0. If you know please share this knowledge with those of us who don't
i spoke with crane summer 2019 and they were working on roller cams for the 4.0l but comp bought them and tech support isn't aware of them working on the project..
Comp Cams also bought out Edelbrock. I'm a senior sales rep for Summit Racing Equipment and it was kind of a big deal fo everyone involved.
keep in mind these engines were originally designed in the early 60's by AMC and the 4.0 was AMC designed and built just before chrysler took them over. Excellent engines.
Would love to buy it! What's the asking price and what area do you live in so I can figure freight?
I built a 4.0 using your videos. the camshaft i used was stock .265 lift, paper work stated rocker-arm ratio was only 1.5 not 1.6 giving me .397 I think the camshaft changed after 1995 . I see the engine you're building doesn't have a girdle i think that makes it pre 1996, can you check the lift on that engine just for fun
Love 4.0 Jeep engines
Subscribed 👍
What, no roller camshaft upgrade? There has to be one available.
She grow up in a mechanic hot rod type family?
She's pretty- I mean she's pretty cool. I mean this is pretty cool. I mean, you know...
Your wife is cool. Are you moving shops or shutting down? Have never seen the garage floor.
Hi @myvintageiron7512 Did you sell that rebuild already ?
I love your videos!!! I can tell you're very good at what you do and I was wondering if you could give me some advice on something? I currently have a 2000 xj 4.0 with a cracked head, it holds around 13 psi of oil pressure at hot idle (verified by mechanical gauge) but there are no knocks yet. Is it worth just replacing the head?? Or should I be looking at a whole new engine or atleast a rebuild? There is around 140,000 miles on the engine. Also do you have any recommendations for either option?
junk it. the 4.0L auto 2006 jeep i drive has gone though 3 engine's/rebuilds 120k Mi ish on the clock and starting to have problems with the OG transmission. my understanding is the 4.0 started out life as a 1920's gmc/continental tractors-ish engine ( AMC somehow got ) ( and at least with the other owners i have met said that there jeep gets terrible MPG and i my case is under 14-max ) and was ok for the time with a stick mag+carb, the transmission is 1960-70's car unit and both are ok 👍by themselves, but as a combo junk 👎, i feel the LSX ( first pick for gasoline ) or 3G/v6 mopar or diesel ( or ford coyote for for nuts as my family member is, just not my first pick as parts as more $$ ) engine swap is a better deal for automatics ( and well your at it grab the newer overdrive transmission aka 10L80E and atles T-caes ) and mostly a d&d jeep
the 2006 rubicon LWB has a cracked block and head right now and a cam/lifter thats bad/threatening to lock up the engine aka it drive's but it's junky 🤬🤬
Is it pointless to replace main bearings and pistons every 100k miles on a Jeep 4.0?
You stated that this engine is for sale. If you still have it in certanly interested and live near the area.
Please advise. Thx!
That block has spots for dowels in the corners also so is a 96 up NVH block. Were the dowels not in the block when you tore it down?
the early 4.0 does not have dowls from the factory you are mistaken
If you look at all of my comments you will see I said exactly that. To be even more specific the 87-95 do not have dowels the 96-06 have dowels. His block and head both have spots for dowels but he didn't have them in it.
Nevermind, what I saw dowel holes in was just the head gasket so it is a 87-95 block.
I have a weird question in doing a lifter job on the same engine for the first time are the lifters supposed to be spongy or hard to where they don't move
the new lifters will not be pumped up you should be able to move the plunger
Harland sharp roller rockers?
How much for the Engine and where located ?
what's you take on using a piston with an oil ring support rail for street use, rpm below 5500?
Is the engine still up for sale if so how much you asking
What Jeep and year was that 4.0 out of, and is it still for sale?
Ok, how much for the engine?
Still got that motor?
So, how do these 4.0 compare to Ford's 4.9?
Thats a tough one I am actually a big Fan of the 4.9L ford They both have great potential
Do you still have the jeep motor
You married out of your league, I see, just like me.
Did you sell the engine?
My wife wants me to buy a crate FE 390 to replace my FE360. You wouldn't happen to have one would you?
Hey it’s probably a long shot but I’m looking to get a 4.0 rebuild. My local guys aren’t nearly as meticulous as you and this build. What is your contact information?
sorry fresh out
I did not see a head gasket go on, guess I missed it.
Yea you did
@@Myvintageiron7512 I guess we ALL missed it!
Is this engine still for sale
Did you sell the 4.0 yet how much
I need a new 4.0 for my 99 jeep grand cherokee. I will buy it if you have no takers
No port matching?
How much for the motor?
Phoenix
She seems like a nice lady. But then, I'm not married to her. 😆lol
is it still for sale?
Still forsale?
👍🥂😉
Is this motor for sale lol
Will you be Dyno-ing the small block ford?
What is the new head casting #?
If anyone wants to know head casting and respective flow numbers for each head.
www.bigdoggarage.com/jeep-4.0-head-numbers.html
where is the head gasket
where are you located
He's in Phoenix
She have any sisters that like wrenching too lol 👍 I'm single
How can I contact you. Your wife is great, my wife calls a Cresent wrench a monkey wrench, so yeah your a lucky guy.
Is it still for sale?