Your First Engine Job - Pulling The Head And Assessing The Damage

You know , I'm not sure a remanufacturrd anything is a better bet in this dystopian automotive future we're living in.

You have to many other customers that do know you already.

Thank You Tony,
See you Tomorrow, Reeeeeeeeeee, Keep your dick in a vice, Hello Humans Hello Humans, Stay Awesome, Go Away Now, God F*cking Speed, God Bless

According to the FSM on 4.0’s if you reuse head bolts they should be marked. Marked head bolts should be discarded and replaced when removed.

Since 4.0s are subject to overheating I suspect that head has been off a time or two and the bolts weren’t replaced.

When I rebuilt my ford 300 inline 6 engine, I tried to get a remanned head but they were and are still unavailable. Mine was cracked so I had to go buy one from a salvage yard and get it machined. When it was all said and done it was actually cheaper or about the same as a remanned head. So, while yes a remanned head will save you time and maybe some money, the availability is something to take into consideration.

They sell alinumiummmn after mafket

I hd xj jeep 2 doors and 5sp i fod it at shop it was there onthe side said what up they dont want to fix saidthey sellit said the head was shot a friend had one got back from rebuild i needs it he said i don't want to fix mine he was bodyman i

Why you swipe PEG'S LEG, Uncle TOny!!??? lol😉

good job uncle tony sir.!.

4.0 intake valves have a height of 4.912"
Exhaust valve height is 4.940"

Anytime I remove oem head bolts I throw them in the scrap bin, head bolts are cheap enough to buy a new set and have peace of mind.

I was building an engine from old parts. Just lined up headbolts by length from 3 different motors and used the shortest ones.

The scandinavian hot-rod standard engine is the volvo redblock. Known being inside in the highest miler car volvo p1800. I think it has the same burnchamber as in a buick.
Factory performance motors have around 1hp/cui, but they go up to 2hp/cui NA. Stock motor, with new rods can go 3hp with turbo. Record for this motor is in a dragster thay goes more than 800hp from a 2litre 4 cyl, desinged in the 1950s.
You could go and see this guy "David Bello" or another enthusiast.
I think you would enjoy seeing a teardown of a volvo b18/b20 while talking about similarities on american desings ;)

Thanks for the teaching.

I'm pretty sure one of those head bolts needs permatext when installing cause it protrudes into a water jacket

Another thought about the gak in the intake ports could also be from the PCV valve. Depending on where it is located on the valve cover, and where the vacuum hose for the PCV valve is located could cause that build up. I could be wrong, but that could be the build up in those ports.

Shoulda pulled the head and found your watch.
J.E.E.P.
Just Exchange Every Part.

Thanks UTG - I liked the gas in the combustion chamber testing for valve leaks

What's in the inlet port is also EGR and PCV residue.

Sweet getting it done, brother.

I have seen a lot of your videos. Wish I had your knowledge. To me it's a hobby. But with your skills it'd be a great career! Keep up the good work and thank you.

PLEASE add something in the description or title that indicates which number in the series these videos are. I'm thinking about those that may stumble on to this invaluable series years from now, and the importance of easily identifying which video is next.

Excellent channel! I've rebuilt one engine so far, an International Harvester 345 V8. My daily driver is a '98 Jeep XJ with a 4.0 so I'm especially interested in this series.

Looking forward to this whole series. As a guy who has never done an engine but would discount doing one in the future if the chance arises.

Be careful on those 4.0 some of the bolt holes for the head go into water jackets you must use silicone Or liquid Teflon

As for your theory on bolts,I will listen to ARP first,before your theory,which is off by a lot.

Heads are very suspected cracking also

Hugh,I agree with you,you do a average build,parts and maching1500-2000,and now you don,t want to spend 50$ on bolts,go right ahead,watch that head gasket come out.Alot of times the threads at the top of the thread length are sitting above the deck in the head bolt holes,even if its just a couple,and over time,bad oil and gas and carbon gets in there and sits for how many years,as a example,you remove a head and the head bolts are covers in black crap sitting rotting the threads and the shank of the bolt away.After working on engines for 49 years form race cars,trucks,and aviation,you see alot of shit,and there can be badly made bolts on the factory line,god forbind that out of the 10,s of millions of bolts being made for as cheap as possible that there be a few thousand difference in the thread pitch or the diameter.Scott Preston/mrmopartech

The #1 cylinder is the one that overheats on these engines. On a totally unrelated note I have some good stock valves and pistons from a no longer complete engine I could probably ship your way.

No doubt Uncle's right about just replacing the head to save time and money, but I'm hoping he does a rebuild on it himself.

In Australia a 6 cylinder Ford 4.1 liter was only $500 to $1000 most of them were new heads, all the best to yous and your loved ones

TY Tony for the shop class . love this stuff.

Harikasın tony

I have not had good experiences with reman 4 liter heads. I had one refreshed at a machine shop for less than 300 bucks. Cleaning, valve job, springs, seals. Ready to paint and install, and I knew what I was getting. Why would anybody bother with a gamble on a reman.

The bolt stretch is 100% correct, this happens when the bolt's yield (and likely ultimate tensile) strength is exceeded and it begins to neck. It will lengthen at the expense of diameter and that relationship is described by Poisson's ratio.

My materials class finally coming in handy :D

Let's say you do end up going down the route of a remanufactured head. Can you list out what exactly you should take with you to the place you ordered from, in terms of what a proper "core" is they're looking for? Like would the remanned head come with rockers, or would it stop at valve springs typically?

soaking in all the practical knowledge you share, thank you.

Thank you Uncle Tony for this, I have a 99 XJ myself and Im planning on keeping her as long as I can and I know there will come a time that this may happen.

Thanks for the new series UT. This perfect for me. I’m sorta starting to become fascinated by the IC engine invention, in general, and only now appreciating just how many explosions are actually happening per second in an engine🤯Then it’s all timed!?! 🤯and how strong the block is?!🤯 etc. Its cool to see this step by step breakdown and series. 👍🏻

we need to get these videos numbered i cant tell which one i see next lol

HOWdy U-T-G, ...
Thanks for the insight on Head-Bolt S T R E T C H ...
can this S T R E T C H I N G be applied to legacy WIVES = to return the Hour-Glass-Shape ? 🙂
RE-MANUFACTURED Head = I trust my work on my rebuildable OEM head >more than these aftermarket REBUILDERS on who knows what CORE they pulled out of the junk-yard ...
COOP
the WiSeNhEiMeR from Richmond, INDIANA
...

You look like a man I knew, Simon. Around your age, more or less worse for wear and now he's in prison. Cool dude, taught me to praise God in all I do no matter how negative because the sun will always rise. Needa send him a letter

Great advice on getting a reman head if the teardown sees trouble. I once had a Chevy Cavalier that needed valves ground. Due to cracks between the spark plug and exhaust valve (those engines were known for them) It took 3 heads to get one that was good enough for the machine shop to rebuild...by which time I had almost exactly the cost of a reman head in it.

I've got a 1968 jaguar 3.8 that's locked up. It's been soaking for months and I've finally resigned myself to having to open it up. Looks like I'll be watching this series of UTG on repeat over the upcoming winter. (Southern Hemisphere)
Looking forward to it if I'm honest

That gas trick is smart, im so used to sending heads out at the shop I work at. This is great for DIYer's

Wha Happen ? IDK whu hoopin ?😊

So why would you use gas to check for leaks on the valves rather than water? I’ve seen people pour in water and use air to see the bubbles. Just curious

Does anyone know what is a good source of remanufactured heads? I am looking for one for a 2002 Trailblazer. non performance.

if i remove a head correctly without any overheat issues will the head always be straight? and how bad is it to not follow the star pattern?

Can I just say thank you for this? No one takes the initiative to teach newbies anymore, and I would not nearly have this quality of knowledge from most other sources. It has been my life's dream to build a race car, and I'm doing now. 🔥