100% J.B. Weld Cylinder Head? Seriously!! 

If JB weld needs advertisement, they seriously need to use this guys youtube video. This guy just made JB weld sales go up, give him royalty checks lol.

Well if the Head cracks, just repair it with JB Weld

"With a ratchet you're most likely to keep it straight." Proceeds to do the tower of pisa stance.

Wow - I never would have believed it. Thanks for the video! Suggestions: 1. Show us the inside of the cylinder head after a minute 2. Run it until it fails 3. Fix the failed JB Weld cylinder head with JB Weld, and repeat!

I'm amazed, I was expecting a "that's a lotta damage!"

Brothers Ford f150 intake manifold coolant passage cracked on a road trip, fixed it with JB weld and it made the 400mile journey back home and even did some errands around town before it broke again. Jbweld can fix anything, even a ford

You have singlehandedly assured that JB Weld will be around for another 50 years. This was incredible and this coming from someone who remembers when this product hit the shelves. Everyone should have JB Weld in their tool kit and in every car or truck you own.

This is honestly how Subaru build their motors

Just build a whole engine out of jb weld xD

You can get away with adding metal powder up to 1/3 of the volume of the epoxy. That both makes it stronger and better at dissipating heat. Cast it so i has fins like the original cylinder head, but taller to account for the worse material, and i think that thing would probably mow your lawn before it dies.

I'm watching and realising you hadn't thought to earth the plug and I was surprised when it fired up but could see it arcing to one of the head bolt washers.

Years ago I got convinced about JB weld when I watched a guy repair an aluminum AC condenser with it. Great Vid I watch your Vids all the time.

Run it until it blows!

JB weld... write this man a check!!

I just used JB Weld to repair a hole in an automotive seat mounting bracket to avoid welding. It worked perfect. Great demonstration BTW Always enjoy your videos!

JB Weld for gas tank cracks, is beyond phenomenal ! Gas or diesel, steel, or plastic tanks, JB Weld has my vote, and has saved a number of my customers $100's of dollars ! Can't say enough good about it !

I honestly appreciate the time and effort that you put to make these great contents.

Actually surprised it ran at all. Not because of the jb weld, but because there was no ground for the spark plug. It just so happened that the gap between the plug washer and the head bolt washer was close enough for the spark to jump, can see it arcing while its running.

7:50 did you see the spark between the washer and one of the bolts

What is this gentleman's background? His methodical common sense approach is just 100%. So impressive to watch.

"I like to use a ratcheting tap piece to keep it straight..." it's as crooked as a politician.

Aww. I wanted to see how long it ran total before failure and I also wanted to see inside after the test to see the damage or lack of.

Brilliant vid. Since I saw your first JBW test, I have repaired Land Rover body panels with it and today I plugged a crack in the grip of a cheap handheld spot blaster. Definitely a toolbox must have - thank you. 🙏

JB weld is pretty good stuff ! I had a 2000 E-150 with a coolant leak. Its a "dealer only" part in an extremely tight space(entire intake manifold off to fix correctly) that was leaking right where the part(just a threaded pipe) screws straight down into the block. I 1st tried RTV silicone, just glob'n it all around the base & spreading it with a fat wire bc fingers couldn't even really reach all around it. That lasted a few weeks. the 2nd time I tried an epoxy putty & that only lasted a few weeks. The 3rd time I used JB & its still holding after nearly a year.

i have a '74 Jeep CJ5 that previous owner had the motor rebiult b4 i got it. there was a crack in the block just under and back from where exhaust manifold connects to exhaust when looking from side. it would weep a little coolant, but not an unheard of issue. year two of my owning it, i got sick of seeing it so i ground it out just a touch with a cutting wheel, filled it w/ JB Weld and smoothed it over b4 repainting block....that was 16 years ago, has never leaked since and i need a strong light and magnifying glass to find it. good stuff!

Love your videos! They are so educational and entertaining!

I used JB to fasten a cooling hose in the manifold of my 4.6 Ford truck. It has ran tens of thousands of miles. Great stuff!!!!

I've never used JB Weld but after your two videos on the topic, I love JB Weld and will be using it in the future.

If you had any qualms about the bolt hole that was misaligned, you could always build it out with more JB Weld.

I found this channel this morning I've been binge watching all of the lawn mower videos🖒

Wow .The dedication that you put into your projects and testing is absolutely amazing. Thank you

I know this is an old video but it reminds me of a JB Weld story. In the 80s a kid I knew broke some teeth off the ring gear in his 65 Mustang. Well, having a lot more time than money he took the ring gear out of the axle and washed/decreased it and formed up some teeth out of JB Weld. After it dried he used a dremel tool to cut them to the same height and shape as the originals and put the whole works back together. I told him 'That Shoot(or something close) ain't gonna work!'. He drove the car around the block a couple of times before it broke! I mean Yes it broke but it was pretty impressive that it made it that long! I love all of your videos. This channel is 10 times better than anything on TV these days!

Can you show the damage to the head after 5 minutes in another video?

this guy is a legend

When I was a kid, I bought a broken CR125 dirt bike for $100 because it had a huge hole in the side of the block a little larger than the size of a quarter from the motor bottoming out on a larger bolder rock. I was only 13 years old but had a lot of experience from doing stuff with my dad. I used JB Weld to fill the entire hole and then a dremel to shape it perfectly. Never leaked oil and ran great for years and then sold it for $1,500.

You are impressed with J.B. Weld and I am impressed with your ingenuity. Thank you for your public service

It looked like you were getting arcing between the washer for the sparkplug and one of the cylinder head bolts... are my eyes deceiving me?

5:05 Caveman CNC machine! I like it. I bet you had about 30 hours worth of work to make this video. And it works!

Well done. I like your videos! I used JB weld to fix a crack on an OMC outdrive and it worked great. Sand away the rest and paint over it and it’s so solid.

The inventor of JB Weld deserves a Nobel Pace Prize, along with the inventor of duct tape and zip ties.

You did not provide an electrical contact between the spark plug's thread and the mass. So you can see sparks between the big washer and one of the head's bolt - some part of ignition power wasted there. Aluminum is a good conductor, JB Weld - not.

maybe you should drill a hole in a piston and try to fix it with JB Weld. Wouldn't that be a great idear? :D

Im Sitting in my dump truck at a job site being loaded watching project Farm build a cylinder head out of JB Weld while a construction worker fixes some weird tool with JB weld on a mechanic truck LOL weird coincidence the stuff is used everywhere!! I'm amazed you answer every comment you're a good dude Todd god bless brother

I overtightened and cracked a temp sensor fitting on a 99 mustang GT intake. Fixed with jb weld. Still no leaks 3 years later when I sold the car.

In the Army we had a proprietary form of Epoxy with shreds of titanium in it for strength. We used it for repairs on the engines of tanks, APCs, trucks and just about anything else that required that the repair endure immense amounts of stress, such as a 427 blown Chrysler Hemi Diesel crank bearing housing in the back of the block. One enterprising young feller even made a barrel for an M-3 grease gun from it, and it did yeoman's duty for about 6 magazines. We decided that he'd proved his point and I personally destroyed it.

Good job, glad it ran so well !

I have to mention after watching this with my Son today and if the large washers were not used between a head bolt and the Spark Plug, the engine would not have run. It’s important to know that the Spark Plug depends on the metal cylinder head threads for its ground. The solution if ever doing this option, if needed, is to use connect a piece of wire between the Spark Plug and a head bolt that connects to the engine block. 😊

Creative videos like this one are awesome yet still informative. Very fun to watch the well detailed build process. Keep up the good work.

I wonder what JB Weld thinks about this?

a month ago you had 4k subscribers. I looked again today and you have almost 20k! keep up the great work. I love your videos! glad I can say I was a subscriber from the beginning

I've seen jb weld perminantly seal a cracked sbc 350 from frozen water Crack. Still going after 4 years daily driving... Seen a Honda 50 dirtbike with a hole in the crankcase last for at least 5 years. Repaired a leaking radiator with it as well. This stuff is seriously tough man! Thanks for your hard work, absolutely incredible

You know what you shoud make an cylinder head out of exhaust bandages you know the thing what hardens when its put out to heat. Love your videos!

That was awesome experiment.

I have to say, although this video is three years old I think it's the best video of all times. From scratch you've made a freaking head that worked, man that's bad ass. This video goes as #1 in your hall of fame of all your videos. In fact, I think you should get your viewers to judge what videos should make it and why. Just a video idea for you to kick around. Yea, you have my vote and why on this video being #1 in your hall of fame of best videos, this one is bad ass I tell you.

JB Weld is great stuff. My dad rebuild a steering box for a tractor with it once and I fixed the coolant overflow tank on my dirtbike with it.

Years ago I had a tiller that had a tree limb fall on it braking the carburetor and half of the bolting surface off of the block. I used a toilet paper to reform the intake hole and painters tape to make a form then poured JB weld in to "recast" the block then filed it down and tapped the mounting hole. That lasted 7 years. I must say that $5.00 worth of JB Weld paid off time and time again.

Love the hard work and dedication you put in your videos keep it up

Eventually, an entire car from JB Weld...

I bought a Honda XR500R dirt bike cheap where the engine case had been cracked and repaired with JB Weld by the previous owner a few years before I bought the bike. On this bike, the engine also serves as a stressed member of the frame. I had it for 5 years and never had a problem with it and later sold it to someone else. That proved JB Weld's strength to me.

I'm never disappointed with PF work. Man deserves to be a Millionaire.

I was wondering how you were going to ground the spark and then I saw it arcing to the head bolt for ground

JB WELD AMAZING JOB INFORMATIVE TESTING 💯👍🏻🇬🇧

This is a nice throw back to when you were just a small channel. You've definitely earned all of your success!

It’s a crime that this video is not sponsored by JB Weld

Amazing experiment, I was hoping you were gonna run it until it broke and/or show us the aftermath. Keep those videos coming.

"Alright guys, i want to keep this channel for scientific purposes and for information. Now lets make a cylinder head out of JB Weld" i love this channel😂

Impressive! Great job making the head!

I know this is old but thanks for doing these types of things. These ideas do cross our minds as we work with this stuff (JB Weld, Glues, Mechanical Item, etc.) but we do not have the time to satisfy our curiosities. Now you do it for us. THANKS!

You are an extremely clever guy. I watched you very carefully how you did different tasks and you're totally professional. It's nice to know and also from the point of mechanical things, of course, we should always use them within the parameters for which they were designed. What you have shown is that amazing things can be done and motors can survive an awful lot. Most people I know, never change the engine oil in a mower. Just think how much hassle the engine has to deal with, with owners like that. You asked what kind of additive you should test since you are very sceptical about them. I'd like to see Ceramizer tested to see if it can really repair scores in bore or piston and to what extent can it do that say with a very old engine. How far can it really restore all the old wear damage, the light scoring and so forth?

First of all, I love what you do. You're one of the most informative channels on youtube....... I just wish you'd have run the head until it failed. I'm curious to see how long it would last.

Love that JB Weld it’s my go to product!! Works every time!!

JB weld is amazing stuff. Hand my sled chew up a ring and pitted the head. The local power sports repair guy. Buffed the high points of the pits out of the head. Then he filled on the low points with JB weld. Then buffed again so it was smooth. I was very sceptical of this repair But it was a much cheaper fix then buying a new head. He also guaranteed that if it failed he would rebuild the engine with a new head. Well it's been 6 winters and about 4,000 miles and no issues. Made me a believer

"With a ratchet you're most likely to keep it straight." Taps it at three different angles. Just razzin' ya.

Hello PF, The various tests that you’re conducting are very basic by design but pure genius in the well thought out way that you conclude your test and present the amazing results. What you’re doing could be called a scientific art form for the logical mind. You explain every step of your project in a way that even the self proclaimed web experts should be able to understand. And above all else, on the rare occasions that you make a mistake , you don’t hesitate to mention it and that speaks volumes about your integrity. I ran across your ingenious activities by chance while browsing through this sea of brain dead geeks doing silly things to amuse their simple minds. Now I’m having a difficult time attempting to move on to anything else. Your projects yield results that can used

I just used jb weld slow set to glue anchor bolts into the broken lifters inside ford focus 1.6tdci. They broke off half way down when I tried to extract them. Tried super glue, tried gorilla glue epoxy neither held up but the jb weld got the job done wish i had of videoed it was an amazing job which most workshops would of said cylinder heads scrap thanks for your tests on jb weld that gave me the chance to use it great job.

I used JB to weld a broken / cracked exhaust manifold on my crownline boat! It worked great. JB might not be perfect in all applications, but with good preparation you might be surprised! I have even bonded and then machined parts. It’s great stuff!

I have used JB weld for alot of years and love it, If they dont endorse your video something is soooo wrong!!!!

Well, I'm sold on J.B. Weld! :D

Very cool experiment. Fun to watch. Thanks for your time and expertise.

I laughed through the entire video! God! IT WAS GREAT!!!!! Thank you for your time, patience & ingenuity! I never bitch about the price of JB Weld.....& I have used LOTS of it over the years. I personally thought the head would split & bits & pieces would fly. Simply AMAZING demonstration! Great stuff as usual.

Was using jb weld Years ago. A guy with A caterpillar dozer jb Welded the block, when it Cracked in cold weather. Worked fine for years. Great product 👍

Nice video, keep the good work

My college roommate had a small boat. It had cylinder damage just under the head. A small channel between the cylinders, about 1/4 inch. We filled it with JB Weld, put the head back on and went water skiing. Worked great.

A friend of mine in Valdez, Alaska, repaired a hole in his gas tank sustained when he drove over a rock on the highway. The hole was about an inch long and maybe 1/8 inch wide. He repaired it externally with JB Weld and the repair held for years. He actually sold the car with the repair intact.

That's so cool ,I would have liked to see it's failure point. Future video?

It would have been interesting to see a long term test with this. 5-10 minutes running, multiple cycles cooldown cycles (we'd take your word)

It’s a completely absurd idea, and I watched every minute of it! Thanks for all you do

I had an old FZ 700 Yamaha sport bike as a young man. The type with half a fairing and the lower part of the engine sticking out. One day I dropped her at a car wash and cracked the casted oil cover on the engine. It broke into at least 10 pieces and most of those went down the huge drainage grate! All the oil leaked out and had to call a buddy with a pick up to bring her home. Yamaha wanted $200 bucks for that little ashtray sized piece of pot metal and back in the late 80's that was a WHOLE WEEKS paycheck for me! So I grabbed a few packs of the old school JB weld, Filled in the giant whole in the oil cover then sanded the inside out to clear everything. I smoothed the outside to a perfect oval original shape then painted it black. It looked FACTORY made and I just wanted it to hold for a few months till I saved up the money to buy a new one. Well never bought a new one because that sucker lasted the 4 years I owed her, Not a single LEAK! JB Weld has been in my tool box since then! Great Vid!

Would have liked to see how long it would have lasted! I also was curious as to how you made that spark plug work considering they usually use the metal they screw into ALSO as the conductor of the negative polarity of the power that make im them spark. Did you achieve that through those two adjacent metal O rings that sit on top of your homemade cylinder head, one of which sat around the spark plug? (BTW, is an O-ring the same as a washer?)

why just one min why didn't you let it run for long btw you should have checked if engine is overheating with this head as this won't be a good conductor of heat and due to bad heat transfer engine could over heat

Try installing a box with a SPDT switch and a momentary normally open switch. Black lead from drill press to center pole of SPDT. Wire one side to the momentary and attach short wires to the unused terminals of both switches. Wire nut the 2 short wires to the black wire of the plug. Put the tap in the drill press and set the SPDT so the drill doesn’t run. You can bump the momentary switch to barely move the drill allowing you to tap a perfectly straight hole. I was waiting to see how you were going to make the cooling fins for the JB head... LOL! I really enjoy your videos because they are informative, entertaining, and they make me think! Keep up the good work and, as always, thank you for your service!

Totally cool man ! Thanks for sharing. Stay safe my friend.

Try this aero space epoxy. EA 934NA Aka metal set. That stuff works miracles It’s similar to jb weld

Wish I had tools like yours. I couldn't take my eyes off the screen when it was running. Great video.

Crystalline solids have well-defined edges and faces, diffract x-rays, and tend to have sharp melting points. In contrast, amorphous solids have irregular or curved surfaces, do not give well-resolved x-ray diffraction patterns, and melt over a wide range of temperatures. Amorphous material makes the difference as the concrete endures for more than decades. I love the video

I love your videos man. I always learn something that sticks with me. Thank you.

You seem like a genuinely great guy and your reviews/ tests are hands down the best scientific tests on RU-vid

would double like if I could! thanks for taking the time for this experiment. if I wasn't already subbed, I would be now!

Jb weld is good stuff. I have been using it for years and about everything. It is good for quick fixes if you don't have proper tools available.. Very good video! 👍

Impressed with both the JB weld and his work of art.