Third country engineer here. Normal rural mechanics here have little to no technical knowledge, since we only need things to run. So, as a rule, if an engine need to be open up and fixed here, it will run like apeshit, and likely broke down a few months later. But they do work, and repairs are dirt cheap. An 1 cylinder motorbike engine here take about 50USD for a complete overhaul We use them in bikes, small boats, and agriculture machinaries.
Exactly. Dude spent a half hour making a video that gets a bunch of hits and comments, knowing this ain’t gonna work for half a dozen different reasons. Trolling for clicks and damn good at it! Lol
You mean like because the lobes aren't indexed accurately? Or because they aren't spaced accurately? Or because it was stick-welded with a vastly incorrect rod? Or because it wasn't heat-treated? Or because the channel is profiting from people with such a low standard of living that two people's labor for a full day to (probably unsuccessfully) repair a $300 camshaft with absolutely zero basic safety protocols is somehow worth it to their employer, as well as child labor?
So the most obvious gripe is what machinist doesn’t have the chunk key and uses a plate and hammer to tighten the chuck???? Oh and the welding heat destroyed the temper on that part. Not that it probably ever went back into a vehicle
What I want to know is, how the heck the engine gets out back together when there 12 children taking the thing apart and just throwing all the nuts and bolts all over the place and some how there’s not one missing bolt…🤦🏻♂️🤣🤣🤣 love this💩
Excellent work trolling all machinists , mechanics, engineers, welders, and general mechanical enthusiasts! You definitely had ME cringing before I realized this camshaft never saw the inside of an engine ever again…
sorry I am a german mechanic...watching this video, how they are doing...no way...nothing got centered, no material got equalized after welding, no measuring up...All in one...its the indian / pakstany way...not mine...
@@HurkyandBrother You know anything at all about Pakistan? These people have dirt floors, operate lathes while wearing robes. The peak of intelligence in Pakistan is equivalent to 2nd grade educated in America. You really need to pull your head out your ass. This is what poverty does. It forces you to use junk.
One time when we opened up an A-frame and entablature on a ships engine, we found a repaired broken crankshaft which had been welded together in Fiji. The repair wasn't pretty and the resourceful Fijians had done an integral job. The crankshaft was later removed but wow, it steamed them all the way to Australia and then New Zealand.
@@Karlitto шейки и кулачки валов термоупрочняют в закалочных установках, а тут все варено переварено, никакой закалки, все размеры контролируются рулеткой. Интересно, какой там угол на который сместилась одна часть вала относительно другой.
So HOW did they line up all the cams without making any markings beforehand? I inititally thought they'd drill broken ends to fit 1"'dia. guide, then line up broken ends, pin to secure - and then weld.
I can't believe this would work... Even if everything was done accurately Cam lobes are hardened and the heat of welding clearly destroyed the hardening on that lobe.... That said hey it might work for a low speed diesel.
Giusta osservazione, oltre a questo credo che non siano molto allineati i due pezzi perché quando ha fatto il foro di vedeva ondeggiare la punta, segno che indicava il foro fuori centro. Poi non si sa se e come ha allineamento le camme per la giusta apertura delle valvole. Oltre a questo ha fatto molti errori maltrattando il tornio, non ha la chiave per il mandrino della contropunta e lo chiude battendo con un lamierino sulla cremagliera, salda senza mettere una protezione per le guide del tornio, stesso errore quando usa la tela abrasiva sulla camma che oltretutto è anche rovinata sia dall'usura della tela che ne cambia la misura e sua perché ne toglie la superficie indurita dal trattamento termico che, come hai fatto notare, ormai è compromesso.
I don't believe it's accurate it's lobe has to be correctly timed to the lift is correct in the opening of whichever valve the lobe is assigned to I do not see anywhere where he indexed the two broken pieces
Ok so here is how it works.. When hardened cast steel/iron bar snaps it fractures and doesn't really twist so the fitment is nearly perfect. When the cam shaft comes in, it is fitted together at the break and marked with a series of dots on the back of the bearing bosses, They line up in a line so the repair is much closer to index once tapped. . Although not 100%, an off indexed cam, can perform well within 3 degrees over or under center of lobes..so over all you get 6 degrees to play in. After the repair is done, the cam lobes need to be hardened and polished but, in some applications a heat treat isnt a requirement for temporary service and a rough polish with 2200 grit sand paper will do and the oil and mating surface will do the rest. Cool side note when thinking about lining up those dots,... the human eye can determine as little as .005 mm out of alignment...Kinda cool when you think about employing skills most humans never really notice. .
@@tomthompson7400 For low RPM emergency applications run out can be as much as .050 on the boss's and nearly a full 10th of an inch on the cam You see, playing within the tolerances is acceptable and going past them is not unheard of. In fact, this is diesel so, things tend to have larger bearing surfaces and tolerances for "Function" when Efficiency and top performance is not a goal. The option to regrind bearing boss's and make some over sized bearings is there but most likely in an area struggling for resources it will do for now. Oddly enough, that thing could possibly last another 30,000km or more as is, or snap on turnover.. It is what it is. Remember, This is not the first world where you can just order up a new cam from Ford.. Even if you could, Where do you find a cam for an old thumper that was most likely cobbled together from various components from several manufactures in unknown back alleys 40 years ago?
@@redneckhippiefreak ok , so low rpm in a diesel engine is actually classed as anything under 600rpm ... thats that argument over what part of the world is 2.4mm run out on a cam acceptable ,,, that would eat caps and then you will have no oil pressure , where are you getting these fantastical numbers from . and you still have not thought about the crystalline structure in the haz. If it runs its more by good luck than good judgement . Still I cant see the mot testers worrying too much. as for it being cobbled together from various manufacturers ,, lol really? thats about the daftest thing Ive read. Have you built many truck engines ?
@@redneckhippiefreak That explains your answers .... you dont really have a clue , but in the Futon wetting, shandy drinking quiche hunting world that most ethnic yogurt weavers live these days its better to side with the down trodden than to fess up to rubbing llama wax into your hipster beard ,,, careful or you will forget your third world sympathy and put socks on tomorrow by mistake .... me ,, I used to build truck engines for a living , but what would I know. When a wise man points at the stars ,,,,, only a fool looks at his finger. Tofu anyone ??
@@tomthompson7400 LOL Its not about how many I have Built, Its about how many I have Pushed past the limits. XD BTW< How long have you lived in a 3rd world nation without access to needed parts and how many motors have you cobbled together to get the job done? .. Or how long have you been Poor as dirt in a 1st world nation with the same limits to acquiring parts and still needing to complete the contract to eat that night? .. Ill wait..Till then... I wonder if you ever heard of International Motors? You know, the company that cobbled vehicles together from various companies so much so that the motors and transmissions from a wheat harvester and a corn Combine were used for a car and a truck line and engines from every American manufacturer was mated up to transmissions of competing manufacturers? That all is happening today in a 1st world company using various parts from over stocked manufacturers. We put a Yamaha engine in a Ford with a Mitsubishi transmission and Daihatsu brakes. Finding parts for one today is getting Very difficult. ..Imagine having access to not only all the Asian developed stock but also Soviet Bloc and Indian Industrial company parts as well.... Entire engines were developed around military surplus camshafts and cranks that were never produced again, all mating up to transmissions from Mercedes haulers, Chinese tractors and soviet tanks.. . Your Privilege is showing. XP
As a static repair never meant for service again they did a great job, but as a useable part aside from halve the motor being outa time and the overall length and the hardness change on the lobe and bearing surfaces near weld the center drills were off center so now so it has a warp
This is purposely broken camshaft. There is no spot of oil on the broken surface. I think very good training lesson for work with metal. This part will never operate correctly. However they can use electronic timing unit for controlling valves.
Ну блин такое себе. Там же нагрузки лютые. И кмк раковин там после электрода осталось уйма. Под рентген вряд ли он его отнес. Да и по центровки колена он вроде промахнулся.
I love how at the end the young boy gives a thumbs up to say “hey look at the paper weight we made” 🤣 whole video made my head hurt. Put it in the scrap bin Jimmy
This man can make a fortune running an on school class teaching old school machining like this. Nowadays most people can only use a computerized CNC machine and wouldn't know or understand how to run a three-axis machine. Back in the old days machinists did this kind of thing and they fixed things instead of just throwing it away.
The fix is almost never as good as the original. And in prosperous society's if the labour cost is significant, it makes more sense to replace. There's always the safety concern to, and the posibility of the repaired part to brake again and also affect other components. Aslo the insurance matter.
@@think2invest why do you think a fix is never as good as the original? when you fix something you dont have to use worse parts, you can use better parts, in the real world across the globe there are alot of people who dont have insurance or acess to new machines or funding to buy them.
While I understand the point you're trying to get across (fixing is better than replacing), there are certain components that cannot be repaired. In some instances (like a CV boot ripping on an old car and debris entering) it's generally smarter to buy the axle rather than just the boot. This camshaft will never see the inside of an engine again.
Some things should just be thrown away. It would cost more to have this crappy phony repair done than to buy a NEW cam. No way this will ever be used again.
1) how did he index the 2 halves to insure timing would remain correct? 2)what steps did he take to achieve the correct length for the camshaft? I saw him measuring after repair, but not before.
As a retired machinist, I noticed the bad "run out" of the camshaft end as he was facing and drilling the broken end. Your repaired cam.will only run as true as the repair that was done. No dial indicator was used by him before machining. And a 3 jaw chuck was not the best for correcting run out, anyway. A 4 jaw chuck to better correct indicating out the run out. Unless the entire cam and lobes are getting reground completely to smaller diameters...?
It will work, the one good thing I can say is they can make anything with basic tools and make it work. They can’t fight a war but they can sure make stuff
@@scrapyardgarage119 Actually no, it will not. Cam and crank mains are unforgiving if runout in operation is more than .0005" to .001". Max. Otherwise, that cam, under operation at normal speeds and higher, won't last more than an hour. The "repaired" bearing diameter will oblonge and destroy the bearing.
ingenious system to join the broken pieces, but I have doubts about the duration of this camshaft, the welding has certainly altered the structure of the piece
camshaft steel is nothing special and wont be an issue. ive welded lobes on worn hard to find cams and welded build up in crank journals for a machine shop to turn back down. Delta regrinds in Tacoma entire business is welding up lobes to regrind cams for a budget alternative. pretty much any grind you want for under $100 and your old cam.
@@miketlane the issue is more that none of this is properly aligned or centered lol this is never supposed to be used again tho so it doesn't matter, mechanics and machinists aren't the intended audience afterall, people who know nothing about how anything works and are mesmerized because it looks similar to how it was b4 are the intended audience
@@kiyosenl.3889 that lathe looks rough but im sure it centered it as for alignment, that they didn't show but it isnt hard to get it clocked properly and heat treatment is also not hard to do but not shown. i seriously doubt they did all that work not intending to use it again. ive repaired cams, cranks and even top fuel engine blocks with huge holes in them. ive also been to rual countries where they don't have a napa very 10 miles and you either fix it or live with out it. made me feel pretty lazy with all my comfortable gear when i see these guys welding so crude with no PPE
Love these guys and what they do. I have a faulty flourescent light, needs a new choke. It's been suggested I replace the entire light instead of repair.. : (
Oh no ! …… it’s a done deal ! …. Ready to install ….. finished product…. The young lad will hand carry it across town….. From once it came. He will return it to his uncles workshop. Their there will be a large bus disassembled and waiting for the final and most important piece. Once assembled it will be ready to drive and sputter and struggle up the treacherous dirt roads that adorn the rocky landscape
That was a big camshaft, for a big engine. Don't know how long that will hold up under heavy loading of the engine. It would just be more practical to put a reworked cam in rather repair the old one.
If you had some weird old rare engine with a broken cam or crank you will do what it takes to fix it and get it running. I totally believe it will work, just don't know for how long. Good job guys
Y'all need to remember, these guys are not shooting for 'fix it right' so much as for 'fix it right now'. It'll probably work well enough until they replace it with something better, and it's not like it's going into a racecar. Most likely, the engine this goes into is at least thirty years old, maybe even twice that, so new parts would be hard to come by.
Parabéns parabéns vocês são muito bons naquilo que fazem um jovem danado exemplo de vida parabéns parabéns parabéns parabéns .No Brasil precisa de um exemplo assim mais não pode trabalhar porque tem que estudar concordo mas sobra muito tempo pra trabalhar .Saem das escolas e ficam sentados nas calçadas sujas passando tempo para não ajudar na casa não sabem lavar uma cueca ou uma calcinha é só no celulares.isso pode... Vc esse é o Futuro do Brasil . Com 10 anos eu meus irmãos acompanhavam nisso pai no trabalho. E sobrava tempo para estudar se não estudei. Não foi por causa do trabalho...
Definitely a slap on part to get a car sold but then folks around the world do what they have to do get back on the road again even if only a 15 mile ride to the next repeated breakdown. Give this guy some credit atleast showing one method of repair of instead of throwing it away.
That cam was never dialed in after welding, and this would be the last place I would take anything in for repair, Heat treating was non existent, as well using a tape measure for measurement with the accuracy that is required is definitely amateurish,
@@davidhamm5626 Heat treatment isnt for the weld itself, its for relieving internal stresses right across the finished component base-weld-base and the normalise the grain structure. Not that it would matter on that nonsense produced in the video
Two concerns here! Was the cam properly realigned in the proper broken half phase relationship as it was originally made with & are the lobes that were exposed to all that welding heat still the proper surface hardness necessary to prevent wear? I also saw a lot of weld splatter on the bearing surface and lobe. Needs to be cleaned and polished. Might make an emergency repair to get you back home but NEVER a long term reliable repair . SORRY! I think this was more of a welding demo than a make it new again repair!
If you kept the timing as it was previously, I am seriously impressed, nice work 🙂 Edit: Heat affected zones maybe an issue, unless you can reharden it after. Just curious to see it working too 🙂
It looks like they weren't concerned at all about valve timing or even the overall length of the camshaft. They'll probably break the crankshaft in half and match that to the "new" cam profile...
This method of connecting of the broken camshaft with a bar insert inside the shaft is far better than any other method I've seen. However, if there is a key and keyway on the bar insert that would make the joint much stronger.
@@gooddealonly Okay, I have not worked with metal, in any way, having someone explain, rather than make random comments, helps me see why it is wrong.Thank you !
@@davidhamm5626 Not a random comment. Here is why it is wrong: 1) You are using two different metals: the welding stick vs the original and different expansion rates. Different expansion rates will cause bending or cracking. 2) The original camshaft was heat treated at a certain temperature to achieve a certain hardness and strength. Once heated up by arc welding, the heat treatment is ruined and therefore will never be as strong as before. 3) Arc welding is used to build up the amount of metal. The built-up metal would be layer after layer, full of holes and voids, and will never be as strong as the original metal.
stuff like this is of another world. These people really have no alternatives, new parts just are not within reach. I have to bear in mind their plight but at the same time this and countless other "repairs" of complex objects just leaves me doubting that the refurbished part will last any time at all. Welding of special grade steel tops the list, no match up of metallurgical properties, stress of the weld. Then comes alignments and tolerances when these things are being repaired by "eye". I'd like to see genuine, truthful follow ups to the many miraculous repairs posted on Y T.
What we can see here... Broken camshaft prepared and welded. Ok but: - how did they set angular relationship between pieces? - termal colorization around welding - metal changed its hardness - nobody measured distansces, they just hammered it together and it is ok - drops of metal from welding can be seen on other running surfaces - other cams are totally worn - nobody checked radial runout after "repair" - like always welding through lathe bearings Thus - lets weld something and turn on lathe and people will be amazed Final conclusion - totally bullshiting! Huge one!
Why so much negativ comments. They make do what they have .no available cam so they tried to repaired the cam and it worked for how long ? Cheers to them for trying 🍻 learn from your mistakes keep moving fwd 👍🇦🇺
I am constantly amazed at how resourceful the Pakistanis are, using antique equipment, working barefoot on the ground often without even a proper floor. Anywhere else in the world that camshaft would have been thrown out. As for hardening, I don't think the cam lobe actually got hot enough to destroy the temper. A pity the video didn't show how the two halves were correctly aligned for the correct valve timing. Also, when the 2nd half was machined not even a centre drill was used, the drill bit waggling all over the place.......but it still worked! Good job, man! Another pity is that RU-vid only allows us only one thumbs up sign, if not I would have given you ten 'likes'.
I gotta get me a lathe. Years ago I ordered a camshaft from the good ol USA. Sadly 2 months later when it arrived, it was only packed in a soft cardboard box and was in 2 pieces. Took me 8 months to get it replaced.
