Caterpillar Head Cracked || Have You Seen a Repair Like This Before | Complete Repairing Procedure

[@doubleg8030]

It'll be fine. The guy next door makes the valves using the same equipment so tolerances will match.

[@alanwann9318]

Best laugh cheers

[@mikepickell8792]

tolerances "we don't need stinking tolerances"

[@centexan]

That's hilarious! It's all crappy, so a perfect match.

[@kwakgreen]

😂😂😂😂😂😂😂😂😂 P.M.S.L.

[@bruisedorange5576]

Dude, thank you for that. Needed the laugh.

[@genefogarty5395]

Kudos to these guys, they do a whole lot with very little. Reminds of a fella I saw when I was deployed in Baghdad, he was milling aluminum heads with a belt sander set up on urethane skateboard wheels that rode on tracks. Necessity is truly the mother of invention.

[@peted5217]

Too Cool

[@toddamtmann3528]

Damnnn, brother. That's EXACTLY what I said! I even used the word "kudos"! My right hand to God! Great minds think alike.❤️

[@skeezix8156]

We didn’t have an X-ray machine for our heads at a shop I worked at in the early 90’s. An old guy from Texas showed me a way to find hairline cracks. He put desenex foot spray on it, the powder is so fine it finds the crack and settles in after about an hour. Then you either go with new or start welding if it’s feasible. The things you pick up over the years

[@ItsMeeJon]

@@skeezix8156you think machine shops have X-ray machines?

[@nikifly2]

a lot with very little ?! damn this huge machines costs a fortune

[@rickvaiBBB]

Now you can all appreciate how hard your grandfathers father had to work to put food on the table. Great job guys.

[@butchblakesley6239]

I've only seen such talented welders and mechanics in one place. It's called The shop. An old Harley shop in Ventura. My 1952 panhead had a crack in the cam case everyone else told me made it garbage. They repaired it with the same kind of skills and that old panhead still runs fine. Thank you huggy

[@HighlanderNorth1]

Wow, so it was Huggy Bear from Starsky & Hutch who repaired your engine? He must've sold his bar and bought a repair shop later on.

[@butchblakesley6239]

@@HighlanderNorth1 oddly, yes and no

[@ginog5037]

@@HighlanderNorth1 Staircase and Clutch...lol

[@james6275]

a crack in the cam is not nearly what those guys were repairing on the sidewalk. lol Huggybear!

[@richardmessenger9474]

Love it...necessity is the mother of invention...it may look madness to most but when you need to repair an expensive item you cannot afford or wait weeks/months you'll be surprised at what you can achieve...I've worked on heavy earthmoving equipment in a few countries of the world where there is no chance of getting replacement parts you just have to make and mend...👍👍

[@zedcarr6128]

I love the precision measuring instruments these guys use. The electronics repair shop next door has a counter/timer calibrated in hours if you want precision, but if you want standard measurement, they use a calendar.

[@chuckmiller5763]

surely they did a little more so the valves seat correctly. I get hand adjusting the cut depth of the carbide tool until its touching the original valve seat, so long as the guide on the tool is stuffed into the valve stem hole to keep it aligned. Still, funny as hell.

[@georgecarlinn6288]

Money is tight so precision is loose

[@barrioscorona215]

Foo you couldn't do 0.01%🤏 of what they do, even if you had all the tech in the world 🚬😎

[@chuckmiller5763]

@@barrioscorona215 What's a foo????? Is that some kind of mommas basement talk?

[@barrioscorona215]

@@chuckmiller5763 You wouldn't understand, it's a secret.

[@NO-background-music-in-videos.]

The amount of wobble in that locating rod was crazy. Its meant to slide in the valve guide and hold that cutter so as to not let it walk while cutting the valve seat. The whole crack being repaired required it to create a solid area that use to be hollow to allow for coolant or oil passages. The rocker studs that were turned red hot are not just noodles. But I was entertained and that is all that matters.

[@ThePaulv12]

It was only roughed out. There were no seat inserts just roughed out seats.

[@eweunkettles8207]

the serdi wobbles then centres and the air bed locks up a good slap with a size 12 flip flop will secure the inserts

[@badlanz8642]

@@ThePaulv12 If it was just roughed out why did the guy ream those valve guides?

[@ThePaulv12]

@BadLanz86 Just to make sure the holes were straight and clear of debris would be my guess.

[@badlanz8642]

@@ThePaulv12 ….So they’re not gonna replace the valve guides

[@joshkarena3058]

I worked with this former English Air Force Technician who had incredible welding skill knowledge and seen him repair anything placed in front of him, stuff like this, amazing workmanship.

[@chriscorrigan7420]

I reckon these blokes do a great job considering their facility. If you really want to do something then no matter what the situation is surrounding you there's a fix for everything. I've seem and done head repairs before but this definitely takes the cake. The bloke on the torch is brilliant. Who can say that they have filled a gaping great hole in a casting with an oxy torch. If anything went on like that here in Australia the health and safety joker's would be having pink fit's. Just imagine stubbing a toe just wearing those scuff thingy's. Holy shit, my eye's watered thinking about it. I think your doing a great job fella's,

[@kodfkdleepd2876]

The issue is that their fixes generally do not last and can be dangerous. I get it and I'm not saying it's wrong of them but just saying it's not that great. Anyone can do this. I once filled an inch thick gap 3 feet across in shorts in the middle of summer... my father made me do it. I guess he was trying to teach me a lesson... not about welding but about the shorts... it worked. "How many guys can say they cooked themselves welding"? [And I'm sure you know that you don't know that until after the fact] These guys definitely get things done. Imagine if they actually had the tools to do a good job. Maybe that is why the US tries to undermine their society constantly.

[@glock21guy]

I've seen videos of guys repairing heads on the track with melted beer and pop cans. Pretty sure it was Drag Week. Then they push 1000+ HP and race with that. lol.

[@pbettselectric134]

And literally no overhead! Look up , their working outside so literally no overhead , get it!?

[@illegalduckhunting]

Cast iron block this size gets repaired the same way everywhere in the world. You either use powder in the oxy torch or solid material. Impressive job nonetheless with a part that big. One cold spot on the part and it is toast.

[@Scott-q8b]

😅

[@123rez]

I don’t care what anyone says about these guys. They use the tools they have. They don’t live in a disposable economy. If only we in the west understood the true blessing of skills these gentlemen possess. It may not be to exact tolerances or specs. I bet that head stays on the road 10 years before they need another head repair. Simply amazing what ingenuity and fortitude these humans possess. If these guys were given opportunity tools and resources I bet they would be world leaders in innovation! Take note people this is what men look like, no excuses no safety gear no excuses just results!!!

[@Dr.Birkenmeier]

No toes either...

[@joshs.5623]

NOPE! The valves leak as do the valve seals. Compression is also higher due to cutting the deck so much. I'm sure the fuel in that country is not that great. It'll work for a few months till the heat treatment kills the gaskets. You forget the metal that's used to repair is different...

[@billturner6564]

People would not do this if it didn't work I was working with heavy equipment in Ukraine Befor the war... the bucket pin came out of one side on a 50 ton excavator Bent the bucket ram like a twig Anyway no spare ram and lots of work to do So we took it to a place veery much like that they cut the rod where it was still straight and heated it up till it was white hot with a blow torch then rod welded a new bit on the end turned it all smooth on the biggest laith I have ever seen put a thred on the end got the eye back on staked the thred and went back to work that excavator worked for another 2 years in solid rock until the boom split I left at that point but I know they took the boom to those guys for a repeat performance

[@JusticeAlways]

Where are the steel toe sandals? 🤣

[@derekbridgerii2102]

​@@joshs.5623Getting it done is NOT getting it done right. A little savings and the could improve their facilities. Buuuuuuttttttttt, they don't. They CHOOSE to half ass it. Then these channels promote it as "surviving!!"

[@markhenry1144]

Valve seat = +/- 2mm. That's gold!

[@MrTrustafox]

just eye in the cutter adjustment

[@johanea]

The valve guide seem to have same amount of slop. Will sure be great.

[@TheJimbob1603]

Lol!

[@dskillern]

I love the firepit probably made from all their previous repairs. They'll be back soon. 😂😂😂😂😂🔧🔧🔧

[@chriscatarcio2983]

That was the bowl not the seat.

[@jdwond3673]

Yes, used to do this work 40 years ago in a Kansas City weld shop. We used natural gas, fire bricks, asbestos and later, kao wool insulation. That is straight cast iron rod with probably ferro flux. I'm sure there are still shops around the country here in the US that do this type of work.

[@ln8605]

Amazing work

[@khemchee4685]

Sounds pretty rad

[@spannaspinna]

Especially rare or vintage cylinder heads

[@scottcarr3264]

Yeah, That's "old school" just like the Stuff I learned many years ago, here in Australia.

[@jdwond3673]

@@scottcarr3264 That's right. It is hot dirty work, but when you do it right, it is the most solid and leak proof way to repair that area of the cylinder head. If you are repairing an area adjacent to a water jacket, I would then use low fuming bronze; much better flowing and all around an easier process.

[@joelfernando1]

Good news! We fixed the cracks. Also bad news. We destroyed the entire head in the process.

[@markae0]

15:24 yeah you can see it

[@pawelwis7215]

Oh really? At the end this head look`s not that bad. But I want to see You in action with a blow torch doing the same job as them guys.

[@RollingRoadEFI]

@@pawelwis7215 Why does someone have to do the same bad work for you to accept that the head is scrap? Sit down. It's scrap.

[@pawelwis7215]

@@RollingRoadEFI Maybe You did not noticed but them guys are at least 50 years behind us so they do what they can do. For our standards it`s a scrap but for them it will work fine.

[@reecenewton3097]

@@pawelwis7215 Fifty years? That only gets you back to 1972. Take away the electric tools, and you've got blacksmithing in the early 1800's.

[@jackdaicole7595]

I am a poor farmer I have a 1982 f150 4x4 4.9l 300 straight six. Had a crack in the head. I ground it down welded it back up hand lapped the vavles and went to machine shop had it flattened and pressure checked. My buddy charged me 60.00 to do it for me at the machine shop. I have been driving with that head since 1994! Runs strong never had any issues since!

[@chrisfuller1268]

Amazing!

[@magneticpulseengine3605]

your ford gas engine has no where near the compreesion ratio that a diesel has and the pressures in this cobmustion chamber are way beyond that found in your truck

[@wazza33racer]

its also not a 15:1 compression diesel with a turbo blowing in 14psi of boost and under heavy load factor on a heavy machine..........

[@jackdaicole7595]

@@wazza33racer have a old 3208 cat motor has a crack in the block. I ground a v and drilled a very small hole to stop the crack. Welded the block up. Hasn't leaked since. I haul heay equipment and logs with it daily. It's slow and low geared with all that wieght and I love in mountain terrain. So being floored in low gear to keep it moving 30-50,000lbs plus equipment trailer yeah it holds well! I'm the type of guy who relined my old clutch I've done brake shoes that way and yes my vehicles are older but very well maintained. Although Studebaker has been long out of business this old exmilitary truck I put the cat motor in to be able to use it love the full time 6 wheel drive. Goes anywhere. About the size of a dunce n half.

[@jackdaicole7595]

@@magneticpulseengine3605 if the weld is complete and all the way and re machined to factory spec. While not traditional in a throw away and buy a new one society you live in. Lol it does work effectively

[@yasirurooj8749]

Automotive industry is based on extremely precise engineering. Believe me I'm no engineer but the way these guys are "mending" the cylinder heads is mind blowing.I live here in Pakistan and these guys repair the engines which run all the buses which we ride and our safety depends on the skills and the shabby equipment of these machinist and welders.I wonder if they have had any education in automotive engineering because these skills are passed on from one generation to next without any textbook knowledge

[@nopulpapple991]

I'm fascinated by this as well. Their creativity is so high. Reminds me of the time when car mechanics in the US would simply make their own engines

[@cs3818919]

Either fix and have a bus or don't fix and have no bus. Even in North America people used to repair things like this. Now we have forgotten and just throw it away.

[@fanman4230]

I remember repairing a cracked Land-rover cylinder head using self tapping screws. Drill a hole just past the crack, screw in a self tapper and cut flush. Drill the next hole half into the first (along the crack) and fit another screw. Rinse and repeat until past the crack. Face the head and refit. It lasted for at least 10 years before we lost track of it. Later on I came across a commercial repair kit which used a similar method, I think it was called Metalock Metal Stitching

[@scudosmyth784]

They fixed a cracked boiler at our local steam train (metal stitching) , I think 1990s. kzbin.info/www/bejne/qXnIeHelgrVoedE

[@fanman4230]

@@scudosmyth784 Sadly I'm an old fart and my experience of this process came from the early to mid 1970s.

[@badlanz8642]

@@fanman4230 yep stitch pins that’s the proper way to repair a valve seat

[@StupidBlokeStupidVideos]

That’s called cold stitching

[@kevinrice7635]

Agreed 👏

[@eweunkettles8207]

i did a bently head like this years ago , had frost damage used a section out a cast bathtub ,if you coat the gasket face with a mix of chalk powder and oil , graphite and oil or the white developer spray for dye pen kits it does not scale preheat is around 900c dull red and must be covered up and cooled as slow as possible i followed instruction from an old 1920s gas welding manual and the job was a total sucess and saved £6k i used a no 25 nozzle and sif square rods 6mm and sifcast flux still available from sif it can be arc welded too at dull red with 7018 and has no stress when cooled slow i welded some very fragile exhaust manifolds like this a lot better than the snake oil rods its the weld shrinking fast due to the preheat being insuffient that causes cracking

[@RollingRoadEFI]

You can't even spell Bentley

[@eweunkettles8207]

@@RollingRoadEFI no but i can weld unlike you septic tanks

[@RollingRoadEFI]

@@eweunkettles8207 LOL nice random assumption. Emotional maturity of a 13 year old schoolgirl.

[@eweunkettles8207]

sook my boaby

[@1crazypj]

Interesting to know although I doubt I'll be doing anything like it anytime (but, never say never)

[@pyromaniac354]

That valve cutter had more runout then Usain bolt

[@JusticeAlways]

Maybe upgrade from a Homelite drill press to a Bridgeport end mill?

[@rockkitty100]

Amazing what they can do with the tools available. I would love to see the compression numbers as there is no way they are not losing compression through those values..... Great video, thank you!

[@TheGalifrey]

The Valve seats haven't been fitted yet, and they will be cut perpendicular to the valve so they seal, all they cut was the rough port shape out of all the excess weld which is non-critical on such an agricultural engine as the gas flow is already shite.

[@kevfit4333]

Serious skills These guys will be in high demand after the apocalypse.

[@gabipaduraru2004]

Very talented mechanics ! With minimum tools tey made a great work, RESPECT !

[@martinwinther6013]

Can say they come from a great lineage. ;P That area of the world had crucible steel 1000 years before europe -

[@A_Stereotypical_Heretic]

😂

[@Alvar666]

it's the most eco-friendly grill I've ever seen in my life, Greta is happy... :)

[@raffaellobottoni871]

😂😂😂

[@ProctorSilex]

How dare you!

[@Alvar666]

@@ProctorSilex XD

[@Jack-qn4vt]

Except to Andrew Tate ha ha

[@markrainford1219]

You're kidding, there's half a rainforest there.

[@toejam7606]

I am surprised they didn’t put it on a lathe

[@andreww.6507]

😂

[@michaelsimonov5053]

Лучше б они его на токарном сделали.

[@jeffstone7912]

Obviously these guys know what they’re doing. Imagine how good their work would be if they had a decent shop to work in with modern tools.

[@ryanhogan6509]

Yup, they would be completely lost!!

[@ryanhogan6509]

PSA this is tig welding of the 50’s , and just think in 5 or 10 years the United States of America will be doing this very practice if things keep going the way they are..

[@ryanhogan6509]

And we’re worried about dropping a valve, these poor guys are worried about a pound of weld dropping down on the piston., note the amount of spare heads they have to build fire pits…

[@ryanhogan6509]

That valve seat cutter is so bent I can’t believe these guys could not do better with a hammer…

[@ryanhogan6509]

Just your normal compression release valve seats being installed… 😂 😂

[@chrisgouger9299]

necessity is the mother of all invention. amazing what these guys can do with so little...

[@harryprater9014]

They do the best with what they have. Amazing work !!!! Hope the motor runs more than few hours. Still, very impressive..👍👍👍

[@jeffputman8242]

It will be fine , The next guy doing the valve work will bring it to spec's...This was just block repair.

[@andreww.6507]

5 minutes into the video I keep pausing it trying to wrap my head around HOW are they going to pull this off 😂 these videos are just amazing, the skill those guys have. I just love this channel. In Europe a repair shop would never touch this. They would tell the customer it cant be repaired. You have to throw it away and buy a new part.

[@williamfgreene6855]

same iN USA

[@danburch9989]

The new part you'd be buying would probably be this "remanufactured" head.

[@Lauterbach24]

Where labor costs are high it makes sense to not try to repair something this damaged. Where labor costs are low and parts are hard to find it makes sense to try and salvage it.

[@NikovK]

The shit you can do when you don't have to meet emissions standards.

[@joelrunyan1608]

Yeah. Cuz they won't waste their time... this head will won't survive 5 miles.

[@polduseri909]

“Yes, we offer lifetime warranty” but it will be very difficult to find us after this life 😂😂

[@ralph5476]

when it stops again, it's dead, and warranty no longer applies.

[@piopierrew2800]

Warranty ceases if the engine is started....

[@FrozenHaxor]

Warranty to the doorstep, but there is no doorstep, only dirt and sandals.

[@A_Stereotypical_Heretic]

They offer the "outta sight guarantee" As soon as you're out of sight, guarantee is over...

[@ДмитрийТаракан-ф1ъ]

На самом деле хоть все и примитивно, но технология ремонта соблюдена, кто учился в профильном вузе тот поймет

[@beni8121]

I love these charcoal fires in Asian repair movies. Gives lots of atmosphere. And talking about precision: you can always try better in your next life, or in the next life of the chap who relied on your repair.

[@emerald640]

Submarines are welded in a similar way . Outer hull is heated until the welding introduces no stress. Then a patch can be welded in without introducing stress arias and make the whole thing equally strong

[@Pottalowski]

It's about the Heat Affected Zone (HAZ) I've thankfully never needed to use all the knowledge I got from trade school as I'm no welder but the tutor was a welding engineer so we all got an in-depth course of the theory involved 🥸

[@oiooiioioiooioii5400]

It amazes me how much some people are capable of doing with so little. Those bent bits killed me, this is too good. These people need a site where donations can be sent so they can atleast get some new bits.

[@phuqdcreator]

I'm not even sure it was just the bits, it looked like the whole spindle was out.. funny as hell though... lol

[@lookingbehind6335]

I watched a mechanic weld an engine cylinder with a torch and coat hanger. He preheated it on a bbq pit. Put the engine in his wrecker and used it for years. That was in the mid 80’s. I ran into his son and he said it ran like a champ until 99-00.

[@A_Stereotypical_Heretic]

Coat hanger is probably better metal than most heads 😂

[@ProctorSilex]

18:05 Two men can lift the head. 21:29 Two men can carry the head and lift it onto a mill. 26:09 Two men lift it off the mill to move it to the fly cutting mill. 26:50 Two men cannot lift the head. I think the dude in the sandals with the hoist is the brightest bulb in the bunch. He'll still have a strong back when he's 40 even if he doesn't have any toes left.

[@garycooper3021]

Pffffttt… doze were steel-strapped flip-flops. OSHA ignored…

[@vincentoflynn6996]

GOLD.....

[@stephaneracicot791]

blahhaaaaaa thats good buddy im rolling here blahaaaaaaa ya got it

[@nickolastd21]

simple, the surface grinder is a pricision machine and you dont drop anything on to the bed ever. but you also should consider with each sucsessful operation the parts value goes up.

[@NikovK]

25:40 Remember kids, if you cut first and measure second you can always round the number off to being within tolerances you never check.

[@NikovK]

Oh never mind, quality control came in a second later to check inside diameters, comparing one hogged out cylinder with a cylinder that was recently given a layer of forge scale from the 55 gallon barrel of homemade charcoal they used.

[@robertkaplan1146]

Heat treatment is paramount to a cast iron repair. Very good workmanship. 👍

[@heinzbaron9129]

These guys are highly skilled. They make up for a lack of precision equipment with years of experience and thorough knowledge of their craft.

[@lindsaythomas2283]

I would like to see the rest of the repair. The valve guides and valve seats, because the valve guides looked way oversize and out of round. Maybe it goes to a machine shop next. Cheers.

[@bigteddy66]

Me to. I think they reemed out the old guides to take the shank of the cutter then will replace the guides later when the seats are done. Bit that confuses me is the wobble in the cutter. Why?

[@hiscifi2986]

@@bigteddy66 It's to take up the wear in the miller bearings, so the loose head centralises under the cutter... Next question..

[@bigteddy66]

@@hiscifi2986 oh well... There's no need to be so rude... Next..

[@scottcarr3264]

I hope so.

[@derekstocker6661]

Amazing work, wow, what a fabulous skill these guys have got, who would have thought that such a wonderful repair could be carried out and probably save the Cat owners a whole mint of money, or even having to scrap the engine. So very well done guys, !

[@ihaligrygg9411]

That is a-maz-ing. It isn't something from nothing, but it is a terrific result from a fantastic effort in very challenging circumstances.

[@SlwRpr]

Retired machinist here, I loved it!

[@ruijacinto8225]

Congratulations you are the real engineers you alie the experience with the fundamentals of metallurgy the previous eat up reveals you know what you are doing

[@theshyguitarist]

Always great to see that they always put safety first.

[@barrymacokiner9423]

I was glad to see two guys wearing a mask to keep Covid away

[@mountainmyst9026]

This was the first time I saw closed shoes

[@Lord-hoboco777]

That machine drill had some serious wobble but i love how they improvise 🤣

[@dave_in_florida]

They double checked it with those calipers, just comparing from valve to valve the same degree of oval Ness

[@Choober65]

They even got John Belushi to to the grinding work.

[@artur8403]

Drill table had counter wobble so it's ok

[@A_Stereotypical_Heretic]

A little loss in compression never kill anyone 😂

[@A_Stereotypical_Heretic]

​@@dave_in_florida 25:58 glad the fat guy took over else it wouldn't have been so precise...😂

[@surethatsok]

I'm no machinist, but the runout on that machine looked a bit alarming. Amazing what these guys do, though, with the tools they have.

[@steve-ph9yg]

It’s amazing here in the US that head would have been scrapped and replaced with a new or used one. Would I trust that head in a very high compression, high pressure large diesel no probably not. They did a great job and with minimal machine tools they did everything right, they did a blacksmithing process to replace the metal that was cut out with the cracks they got it red hot and fused new metal. If they didn’t heat the head to high temperatures the new metal wouldn’t fuse properly be weak and fail.

[@luukdeboer1974]

If they would use all these efforts to make new engines they would be far better off. Those are industrious and diligent people

[@tomherbert160]

I am a machinist and I agree, the run out was hard to watch. But. After watching it I realised the head itself was not clamped to the work table when he was cutting the valve seats. That then negates the worry of the wobbly tool piece, because the head was moving around all over the place. The tool guide was doing as it should, guiding the tool piece, and the head was moving around with the wobble of the machine. Hard to watch from a perfectionist point of view but I believe it was all working as it should

[@user-yu5by7nb8r]

​@@steve-ph9ygзачем обжигать на костре головку двигателя?

[@lowbornfabrication]

Think those were coolant jackets that were oxy-welded closed in those cracks….

[@DGH12]

I wish I had hard workers like that at my shop . At my shop people are more concerned about their cell phones than the work they are there to perform. Sad generation we live in .

[@ratherbeflying101]

Damn good work for what they have. Incredible determination.

[@frankkolmann4801]

Astounding, now assemble the engine , show us the amazing repair in action.

[@billtrenaman7368]

This was the function of a place in Adelaide, South Australia that I worked at about 60 years ago. We would repair heads and blocks from any thing from Vesper Scooters to Train engines. It was a proper workshop, with all the right equipment.

[@JusticeAlways]

Yeah...a "proper workshop" requires lots n' lots of $$. These guys probably do it at 1/10th the cost. 😄

[@billtrenaman7368]

No it was done in a similar function as is being shown, and probably for a similar cost, the preheat function we used was a bit more developed. The end job was as good as a new product.

[@mathewmolk2089]

Just a note to the Bob Villas out there that think Muggyweld, Stainless or NiRod with no proper prepheat is the way to weld Cast Iron. - What you just saw is the ONLY way to WELD cast iron. If you look you will find it produced an undetectable repair. - Actually re-cast the iron in the broken places. Any other way is just to camouflage the damage. - Oxy Fuel with real cast iron rod is the only way.,,,,and other then a programmable oven charcoal is the only way to pre and post heat the part. - Just cover it in burning charcoal when you are done and let the fire go out over night (or more) and leave it there until it's cool enough to pick up in your bare hands. On the other hand,,,,in the US to make that repair the welding alone would cost more then a complete new loaded head, if you could still find someone with the skill to do it,,,,But just because we would scrap it over here doesn't mean they didn't properly repair it over there.

[@NikovK]

It reminded me of something out of a blacksmithing manual.

[@joeh5428]

Amazing people an very talented at enganuity an a different way of thinking. Simply Amazing to watch.

[@mattblack9069]

These guys are very clever and the work they do is outstanding. Repairs they are doing today are clever and believe it or not such types of repairs were accomplished in most garages and workshops around the world as a matter of having to because of the massive cost if done professionally and of course in the West professional repair shops capable of doing "Guaranteed" work were few and far between prior to the 50's and 60's, and of course if your repair failed you either got sued or run through the courts until it broke the bank. Here these guys are not threatened by Insurance companies or threatened by Court action and I would guess that these repairs are not long- term and there are rather regular re-does which I guess they happily do.

[@SteveO95]

These guys are so good at this stuff. The only people that have hate for this are the ones spoiled by machine shops,where skill isn't as much of a factor. Bet it worked just fine.

[@kevinheffer1006]

yeah Caterpillar were probably misguided in thinking that those exhaust valve-bridges needed cooling in the first place.. blocking the water jacket passages up with weld will be absolutely fine 😂

[@sprint48219]

Strangely enough I have seen head repairs done similar to this with different heat sources not coal and it can be done successfully I used to know a guy that could weld up cracked aluminum cylinder heads back when they were first coming out with those and having so many problems. it was a long slow heating process then do the repair and then wrap it up in insulated blankets and let it cool for about two days are used to think that many blankets would be overkill but you would end up with a cylinder head wrapped in about 2 foot of insulation to make it cool slowly The guy had a very high rate of success doing that

[@jayterrill3252]

no

[@juanrrobledo89]

Awesome skills from start to finish, sure be nice to see the final assembly

[@JusticeAlways]

And see the engine start up. Curious what the overall price for repair be.

[@alanmichels3846]

We did this in Hollywood, Florida in the 1970's. I was the helper for the welder. I ground out the cracks, pulled all the valve seats and set it up in a firebrick oven with asbestos covering the top. We used a big propane torch to heat up the head and when it was ready Lucky would go in with an oxy/acetylene torch, a cast iron rod and flux and weld it up. After cool down it would take me several hours just sandblasting the scale off in preparation for machining. I don't know if anybody still does that in the states though.

[@fundermentalist9473]

I gotta say that’s a fine job you guys did there with skills like this I’m confident you could repair anything… Well done 👏

[@a.g.somsen3419]

Would like to see the next video when it runs??

[@cameronlilly4814]

I wouldn't have thought of simply leaving the iron in the charcoal until it burns out; the ash would be a good insulator to ensure the iron cools slowly. 'Very cool watching people make repairs like this under adverse conditions (tired tooling, etc). I suspect that Gru would approve...

[@KenFullman]

I'd love to be the guy being paid to just wait until the charcoal burns out. 😁

[@jonyoung6405]

He was up all night and is paid less

[@steelwheels327]

Is it my eye but they filled in the cooling jacket on the repair ? also the pilot bit was a bit out of round ....what are the tolerances ?+ or - a inch lol!!

[@hycron1234]

It never ceases to amaze me the ingenuity from some countries.

[@HVASEA]

The big shot gets a table and chair ! Very poor conditions these workers must endure... Much respect!!

[@MrInnovativeEnergy]

This is also how we repair Jet engine blades in the Bayou.......Works great!

[@daleslover2771]

🤣

[@eweunkettles8207]

i repaired turbine blades in a purge chamber in scotland for a yank company id rather work with the indians ! the yanks were all Cowboys !

[@MrInnovativeEnergy]

@@eweunkettles8207 Interesting that those "cowboys" are who built the entire aircraft industry, Boeing, McDonald Douglas, Lockheed Martin, which used to be the only people to talk to if you needed a proven technology, reliable and tested.

[@CrazedCrittic]

Damn! I waited until the end but they didn't show the fitment of the oval shaped valves :)

[@ShadowsOnTheScreen]

It looks great. My only two questions are 1) it looks like they filled the water jacket passages. That might make this crack again quickly, and 2) I didn’t see them drill the new bolt hole they filled!

[@A_Stereotypical_Heretic]

These guys don't care. These machines run with no radiators anyway

[@916hayabusa]

Think that pillar drill could use some recalibration but great to watch, these guys obviously know their stuff 👍👏.

[@ms.annthrope415]

Amazing skills. Just imagine how much more they can do if they had work benches and even shoes.

[@keithyoung7]

Amazing - all the machinery was probably second hand and well past its useful life with tolerances beyond acceptable. However, the guy who gave them the cylinder head for repair understood the price reflected that he was not getting a job performed by Caterpillar trained engineers using modern machinery - but his equipment would be operational for a while longer -- it would be interesting to find out haw the repair functioned.

[@keithyoung7]

@No Name you must improve your reading skills - the word ‘not’ means the personnel performing the repair were ‘not’ Cat trained. Before making insulting remarks (indicating a rather unpleasant personality) make sure of your facts.

[@tim5158]

Could you imagine if they had access to newer equipment and steel toe shoes.

[@kevinrice7635]

Hahaha agreed 👍

[@Darth_Chicken]

They'd probably kick it back into shape!

[@markrainford1219]

Shoes wouldn't last long. They'd be used to repair something else.

[@sjd7188]

You know this shop is safety conscience because they wear closed toe sneakers vs sandals … but seriously amazing that any of this works and the ingenuity to rework stuff when that is what they have to work with…probably no supply chain interruptions ….

[@ProctorSilex]

Except the guy at the fly cutting mill, but he's the smart one with the hoist not destroying his back.

[@roceye]

These guys are top tier- you can tell by the way they have actual shoes.

[@piotrpartacz8622]

I m from poland in my country nobody can t repair head from cat c12, in pakistan it s possible good work i love repairs from pakistan

[@joeowen1068]

Yes, this is a salvage process to try to save an expensive head that is no longer in production such as these D343 heads. I was a Cat factory Service Rep in the San Diego area years ago and fought with a local repair welding shop there who was spray welding heads and blocks and claimed to have a "like new" product when done! We never allowed the dealer to use those repaired heads on a warrantable failure as we had to stand on their quality. Oftentimes the welded product did appear to be as good as a new product but paint can hide a lot of variations!! Buyer beware!!

[@marktaylor171]

There are many reasons why I wouldn't allow any "repaired parts" come into my shop. It's not a matter of if, but when they fail, they will cause a lot more damage than the hole unit is worth brand new. However, it is understandable when you actually think about what you're seeing. All of these videos that show assentully scrap parts being "repaired" are done in locations where everybody is very poor. These parts belong to a very old piece of equipment and are no longer in production. The few used parts are still in existence are expensive because they are no longer in production, and the owners know they can get a high price because of that. They can not afford that and definitely can't afford to buy another machine.

[@A_Stereotypical_Heretic]

They still make new d343 heads

[@ClipDog]

That's some fine machine work going on there, that valve cutter has more wobble than my Dewalt!!

[@edwinpadilla856]

I am amazed what this guys are able to produce with the tools they have, here in the U.S it would require certifications, which means schooling, which also means taking on debt, then facilities and tools approve by osha, then followed by gov business practices, insurance, licenses to operate. Cheaper just to mail the part to this guys, repair it, and then shipped it back.

[@krispykruzer]

Probably mentioned and common sense to most, this might not be the ideal repair, but when considering the cost of repair versus the cost of replacing a head, there’s no doubt that this approach will win. Also, the lack of a full blown tool shop equipment keeps the cost low. Either way the repair will get the trickiest back on the road with a small bill instead of a mortgage

[@orwellboy1958]

I see a lot of jealous, petty comments here. These guys clearly know what they are doing, not just standing by a modern machine pushing a few buttons, you may call yourself skilled workers but these guys have more skill in their little fingers than most of you haters put together.

[@СергейКондауров-ъ5х]

Особенно понравился мангал из головок!!!

[@TheRitchieLeeShow]

I’m amazed at the lengths these people go to to make these kind of repairs. Hope they actually work. This part where they let the head soak in the fire to get them up to temp. Kind of makes sense.

[@TheRitchieLeeShow]

@Jay Smith gotcha kinda like putting the sawdust in the oil.

[@NikovK]

If this thing ran rough, dirty, drank oil and belched soot it would still "work" well enough for some bulldozer or backhoe in a country without regulatory overhead. If it outright didn't work, your customer shows up at your shop with all his cousins asking for a refund. I suspect this will make do.

[@hermesjackle5903]

Good on these guy's , now the valves will get bedded in with a twirly rubber sucker cup. they do things the old way and it works, watching these guys has made me realise I worry too much working on my old four cylinder VW van. from now on I'm going to get my drill press out and my files and sandpaper and concentrate on doing, and less on worrying about a few millimetre.

[@claudenormandeau9211]

India is such an amazing place. I have there and enjoyed the time seeing all the various skills.

[@davidfrank2824]

I absolutely love the fact that instead of throwing this away you went ahead and fixed it. You just don't see that anymore. And the United States we are quick just throw something out and buy something new. I would bet good money you would not find a machine shop that would have fixed this cylinder head. And if they say they can they give you an outrageous quote for the price. All the time hoping you make the decision to buy new. I think the biggest reason I can relate to these videos is for the fact I am sort of like these men. I will do everything I possibly can before throwing something away. I've never had a problem taking anything apart and ordering new parts to fix it. Now if it's something I really didn't like in the first place of course I don't fix it I strip it for parts. As always I made sure to give you a big thumbs up and of course I've already hit the subscribe button a while ago so I can only do that once. I'm really looking forward to your next video. I hope you and your families have a great New Year's.

[@barrymacokiner9423]

I saw my buddy’s grandfather fix a head bolt on his old tractor. My buddy and I were putting a new piston in the engine of his snowmobile when his grandfather took the tractor out of the shop to blow snow. 5 minutes later he came back into the shop. Said something was wrong, it was leaking anti-freeze. Tapped on the head bolts with a wrench and found a loose one. Pulled it up and it was broken off. Flashlights, drill, air, vacuum. He drilled into the remaining bolt, used easy outs to remove the rest of the bolt. It was a 3/4” bolt about 16” long that went from the head down past the cylinders and threaded into the block down near the oil pan. He drilled a 1/4” hole about 1 1/2” deep in each half of the broken bolt. 3/16” holes sideways through the bolt into that 1/4” hole. Welded 1/4” rod into the bolt using the 3/16” holes filling them with weld. Add the second piece and welded it all together. Took it over to his 10’ machinists lathe and turned it true. Reinstalled the bolt and went back out to blow snow. All happened in about 30 minutes. That man fixed stuff, not replaced parts.

[@wellby5000]

​@@barrymacokiner9423removing a broken bolt is not that uncommon even welding up cracks in blocks and heads is somewhat common place but what they did need persise machine work not what they did here.

[@EarthSurferUSA]

That is all well and good, but if you can afford a new head for the machine, (and can still get one), that is nothing wrong with buying a new one, especially if you may depend on it a lot. The chances of this work breaking again in short time is too high of a risk if you need the machine with as little down time as possible, and too high of a risk for anybody who can afford a new one IMO. This--is all they can afford. Quite capable grinding surface machines I saw though. They could have finished the job if they had a good sized manual mill instead of that drill press. They must have sent the head out to get that machining finished, and the seats pressed in.

[@paulhancock3844]

You don't see it anymore because for most of the world, the man hours v cost v future reliability doesn't make it worthwhile. Ok for these guys on a dollar a day , hats off to them, but it's slave labour in action

[@charliehustle2579]

Developed countries: parts are cheap and labor is expensive where in 3rd world countries parts are expensive and labor is cheap.

[@andrewnelson4368]

Surely the welds will have blocked or compromised the coolant passages which would cause hot spots and head failure . . again!

[@DaileyLabs]

those coolant passages where the reason it cracked. we went ahead and welded it solid for you. LOL!

[@vetrieska11]

I think the same. Maybe under light load it will work, under heavy nope i think.

[@philipkudrna5643]

I was wondering the same and believe that they must have welded the cooling passages shut. But that‘s probably what you have to take in stride. There is just no way you can fix the cracks and at the same time „save“ the cooling cycles(?). At least not by means they have at hand…(?)

[@PACTO4HuK_]

Зачем шлифовать головку которую только выкидывать, после всех предыдущих манипуляций, остаётся?

[@levali3699]

рубашку охлаждения заварили. 🤣😂😂

[@grumpyg9350]

Can’t watch anymore. 🤦‍♂️

[@владимирвасильев-д7д]

Да ты что! Еще ездить будут... они же до ремонта как то передвигались 😂😂😂 а тут два дня точно воду выбрасывать не будет..👌😂

[@VladimirPereslavtsev]

Когда седла клапанам начали разворачивать я офигел от точности! 😁

[@МихаилПетров-я6ц]

@@VladimirPereslavtsev ещё год войны и ты так будешь, голосуй за путина

[@isladelobos]

I like the method the young people learn. this is a public job and any person can learn how to make real life.

[@dg5448]

В центре головки (3 или 4 цилиндр) забыли просверлить и нарезать резьбу под свечу, а так норм. Если что то на 5-ти цилиндрах работать будет

[@codyprice0295]

It only needs the candle to start in cold conditions. This is a compression ignition engine. It does not require a candle.

[@владимирвасильев-д7д]

Да судя по изначальному состоянию они на двух цилиндрах пылесосили... видать барбухайка совсем перестала двигатся.. вот и ремонт пришлось делать

[@zbufferasat]

Это специально сделали, чтобы новые трещины не образовались)

[@Odessa-2maya-2014]

Там тепло, оно и без свечей заведётся. Тем более часть осталось

[@alexeygennadievych8913]

Форсунку.

[@wannabepaul]

usually a friable ceramic plug is installed in the valve guide unless it's small then welded around and drilled. yes the guides are used to help set up the drill alignment..but the drill press is about 4 times larger and heavier...and not dependent on the guide. heat treatment and materials and techniques are universal...but the coking fire is unique. a number of things can be done with the drill press, then it has to be refined with a heavier more precise articulated mill, and then re-ported and gasket faces ground. process is rough tolerance to finer each step.

[@A_Stereotypical_Heretic]

It's fiiiiine

[@Dr.Birkenmeier]

I am sure they will be able to get all those supplies from the Home Depot in Islamabad

[@gmans2941]

Is this a video on how to convert a 6 cylinder engine to a 3 cylinder?

[@jonastappe8537]

This is downsizing in 3rd world countries

[@thechallengestradale]

Not gonna be the most efficient head, but it’ll work. Really is cool watching this. It is a needed skill.

[@myc0p]

Those guys are great! Their head jobs are the best!

[@npsit1]

I wonder how well this holds up. 5:07 Also, I'm sure that the piece of stone flying past the cameraman is fine...

[@Exhalation19]

Wow good eye; it almost took out someone else's lol

[@minguyen-rl7sn]

They look like they’ve been in business for a while

[@A_Stereotypical_Heretic]

Was that his grind stone or a piece of that head? 😂

[@JusticeAlways]

@@A_Stereotypical_Heretic Grindstone. He replaced it right after it broke.

[@A_Stereotypical_Heretic]

@@JusticeAlways ah I see it now

[@brianvalliere552]

Does that repair come with the infamous tail light warranty?

[@Denvermorgan2000]

It’s guaranteed that, if it breaks in half you get both halves.

[@festus51]

I often wonder how long these repairs will last ?

[@marianpodgorski9842]

I doubt it will last long. Valve seats were done w/ visual control only w/o any measurements.. like wtf

[@vetrieska11]

@@marianpodgorski9842 I think that new valve seats were seated later. but i think that under heavy load it won't last long because of disturbed flow of coolant and local overheating. water channels in crack places were simply filled in. but under light/moderate load, who knows?

[@NikovK]

@@vetrieska11 Although they filled some of those channels I'm curious if the channels run as a big mesh or more linear. If its a mesh, some of those channels are kind of, sort of, maybe, redundant?

[@summitlt]

Minutes. Possibly a few hours.

[@chriscatarcio2983]

A lifetime. If the operator doesn't get the dam thing hot again.

[@watchman2001]

I fact yes I've seen a similar job on an aluminium head of a Sunbeam Stiletto in the eighties in the Netherlands, the head turned out fine, good job ! 👍😀

[@rodd555]

the more I see of these Indian guys and some of these restoration videos the more respect I have for the way they do things.

[@rottondog1473]

32:22 looks good except I'm just a little wary of the 3rd from the bottom ports

[@Happyfacehotwheels]

I guess there gonna go through the whole process again.

[@ЛеонидПономарёв-з6ч]

Молодцы ребята, знают своё дело. Их работоспособности можно позавидовать в таких условиях

[@bubblegum9969]

Мне интересно,на кого ты похож? Валух конченый

[@darinblomquist422]

It might be easier to check the coolant next time

[@BlackhawkPilot]

I saw the same kind of work done in Korea when I worked there in the 70s. It is amazing what these folks can do!

[@Vermiliontea]

Videos like this is a great comfort to me. Because then I know, that even if civilization collapse, most of us dies and cannibal militias take over for a while, then, still, humanity will rise again, somehow, somewhere.

[@nicolasklopfenstein1305]

Checking the tolerances with a compass! 🤣

[@scottcarr3264]

They were Inside Callipers I learnt my trade with Hand tools. I could feel out of round to 1 1/2 thou with callipers.

[@stringfellowbalk2654]

That guy has probably been doing that kind of work for so long he can just eyeball it. Skills.

[@magneticpulseengine3605]

don't forget there must have been a measuring tape in there somewhere

[@chrishamilton5204]

The wobble on the valve guide lol