How 1 YouTube Comment saved a $50,000 Engine from DESTRUCTION.

[@oldcatmech]

Great follow up, showing all that you had to check! Glad you lesson to the comments, and do a follow up! Great video!!! Keep up the good work!

[@AdeptApe]

Thank you Roc for the comment and your knowledge. Really saved the day on this one!

[@melvingibson4525]

Those look like the same type of bridges as a 3500/3600. You can adjust them either according to degrees of rotation once it makes contact or with a dial indicator

[@dertmatyui]

I can only see your username but if your roc, your a legend!

[@BrendanKenny]

Great job on the comment, Roc! People like you are the reason I do read comments, and enjoy reading them.

[@manvsroad7691]

Great catch Roc!!

[@davidmitchell7183]

You could be the first mechanic that learned about the problem the "easy way".

[@mattmanyam]

Lol, nice!

[@mrkv4k]

Doubt that he would be the first one. That thing, when you have a problem and after some struggle, you come up with a solution that you have to revise or completely throw away, because you had a talk with an older and more experienced friend over a beer later that night, also happens.

[@squareeyes1117]

I dropped oil on a 5 banger ranger a few months ago, I pissed off for smoko. Had the foreman come running over screaming. "You need to put oil in it right now. Don't go to smoko!" I thought he was taking the piss, just being a a prick. The ranger had no oil for about half an hour. The foreman was freaking out and said the oil pump will destruct itself. Well it didn't. So lesson learnt the easy way, Ford's are even worse than I already thought.

[@ThrasherGnar]

That made me laugh, thanks Dave!

[@johnrtrucker]

A wise man learns from other people's mistakes and a true professional passes that knowledge on. Kudos to roc for preventing a disaster and kudos to ape for double checking and not letting an ego get in the way! I just can't believe there was nothing in the cat system about this!

[@deanh7190]

That's 50,000 more reasons why the company is wise to let you film. Well done.

[@Westonsito]

And it sounds like its time to hire the commentor.

[@ChronoTango]

Two reasons it’s bad to let someone film: 1. It’s disruptive of work 2. The company has bad practices they’d rather not be broadcast This guy is good at his job and the company has nothing to hide. It’s a win win.

[@darkracer1252]

in the mean time. the youtube filming itself might be the reason he made the mistake. can't be distracted while doing your work

[@marktemplin1159]

Very good point 🤔👍

[@krabysniper]

​@@darkracer1252 wrong, he clearly stated he had "never heard of this before" so NO, he wasn't "distracted", you may get distracted while recording yourself doing a job, doesn't mean everyone else has that problem.

[@JohnSmith-ih9rh]

A mechanic that admits he doesn't know everything is the best you can find.

[@rearspeaker6364]

💯!!!!!

[@electric7487]

Better to underestimate your own knowledge than to overestimate your own knowledge.

[@tnast]

Had a transmission replaced once, and when the shop said "we can remove and install the transmission, but these ones are so different from most that we don't rebuild them in house", I knew I had found a gem!

[@AlphaMachina]

Always, always, always more to learn.

[@jackmorrison5875]

The learning never stops

[@jameshaskell6572]

This is what makes a great mechanic. You cared enough about your work to not only check out info on a KZbin comment but you also swallowed your pride and filmed it real time and gave the person credit who had the info. This is so rare I am super impressed. Our country would be in a lot better shape with more people like you. Think about that every one! Josh you are 1 and a million. I have too been a tech for 15 years plus and can count on 1 hand people who gave credit to others when they didn’t have too, how many people can you think of?

[@samwalker3441]

Well stated, James. Right on, Josh.

[@michaelrichards4000]

Great comment

[@mikesautotruckrepairinc.cr5621]

I completely agree with your comment James and if you don't stay humble as a mechanic you will be humbled, that's for certain.

[@cryptidnomad3850]

Thats a real feel good video,,👍

[@jameshaskell6572]

@@mikesautotruckrepairinc.cr5621 Man are you right on that one, that’s as good as a proverb in the Bible

[@Wes_9519]

That sinking feeling when you are at home and realize you missed something or forgot something is always the worst. I thought I left the heater on in my ultrasonic cleaner one friday and convinced myself that I was going to burn the shop down in my head so I had to drive 30 minutes to work on a Saturday morning to check.

[@markm0000]

There should be a thermal fuse on that before it ignites the solvent. You should check it to be sure and install one if it doesn’t have it.

[@dicktrickles1870]

Yeah...I work on aircraft...tell me about it.

[@matti8894]

It sure happens more often than we’d like to admit.

[@ssnerd583]

@@dicktrickles1870 ...yep....me too....A&P since 1983, so....ive had a few of those 'oh shit...." moments.

[@mikemorse8592]

Got a lot of miles on my car from running back to check the torch tanks😂

[@boogieman3165]

I think Roc Schall deserves some free merch from you and CAT for that save.

[@RM.....]

Definitely

[@BackyardMechCon]

Was searching for this comment 😂

[@Katsunaka]

Knowing CAT though, they'd only give you merch if had blown that engine up and just bought a new dozer.

[@bige.3474]

Better at least send him a box of doughnuts.

[@jimmyswollnuts7662]

Roc Schall is a good man

[@frederickburns1739]

I'm a retired CAT&CUMMINGS knuckle buster and this reminded me of a visit with a friend that lives in a different state. While riding in his Chevy diesel pickup I heard what I considered a valve tic and I told him that he should have it looked at. Well about a month later he called me and said he wished he had listened to me as it dropped a valve. I watch these types of videos because you're never to old to LEARN!!!

[@G5Hohn]

What’s a Cummings? Is that like a Cummins?

[@tristan6509]

​@@G5Hohn a cummins that cums out cum

[@billymanilli]

He said "Cumming"... huh huh huh

[@randyortonsbulge]

@@G5Hohnprobably autocorrected lol

[@robertpolkamp]

6.2 and 6.5 on old chevys had valve springs break regular.

[@RickSolid1]

I feel like a witnessed a once in a lifetime thing; people helping other people on the internet.

[@rearspeaker6364]

It's not as often as it should be, in this internet connected society.

[@HubertofLiege]

Just your definition of help. I’m sure everything I’ve said is helpful, but likely not! This was a nice catch.

[@clintongriffin2077]

There are video's online, of news people where a growth was in her neck and a Doctor noticed it from a video online and commented he seen something.. and sure enough caught cancer early

[@bluedistortions]

I see helpful comments in most videos, and the trolls are there but the minority.

[@ammygamer]

I say this with kindness, but maybe you aren't looking in the right places? I've been helped with perhaps hundred of little tips through my life from different places. I say this as someone who has grow up with no parents, there's a **lot** of bad stuff I've avoided in life with the help of other people online. If you don't ask your search engine the right questions, it won't give you the solutions (or the kind of people) you are looking for.

[@seagullsbtn]

This “save” is worth every minute you’ve put into this channel. Big thanks to the subscriber for telling you.

[@aussiebloke609]

It always sucks when incorrect parts can be bolted up and appear to still work. Not that one shouldn't be careful at all times, but it lacks that safety feature of the wrong part not being able to be fitted in the first place - especially important in cases like this where it's not visually obvious. Glad you caught it in time, and kudos to everyone who chimed in with good advice. 👍

[@jaydunbar7538]

Those safety features that prevent use make aftermarket modifications more difficult, swapping Oem parts from other gear and vintages is very common

[@oldcatmech]

The latest bridges did not fit on, tell he took out the dowels, that was the earlier style head! Believe it or not there was and earlier head than than that, oiled up the rocker bridge bolt hole, because the block and head did not have an oil passage to the side as they do now! 3406A even the spacer plate was different! That is a hole different story!

[@Apachefog]

Makes me think of the air dryer filters on some of the new semis. The threaded hole is the same size as it was but the thread pitch is different. They should have made the hole a different size to prevent people from screwing up the threads.

[@bluedistortions]

It is indeed a worst case scenario.

[@lernwithgern]

Sometimes the wisdom of the crowd is a real thing. Aren't you glad you read comments? Nice save.

[@PorscheRacer14]

This reminds me of when I was changing the custom bars and chains on the feeder chain of the combine. I was pretty proud of myself doing it without asking my dad for help. Thankfully I went to gloat before firing it up since he reminded me that the feeder chain is directional and if put in wrong it'll fit, but sit just a bit higher on the teeth and bind and break. Spent the afternoon humbled doing it over again and mindful to ask others around me for advice. It just saves time in the end.

[@davetdowell]

As I teach to my students, no one can know everything, there's just too much to know. Kudos to the acknowledgement video, and to the commenters who did know and shouted out the issue.

[@mediarav]

The mark of a man is he who owns the bad as well as the good. Learns, rectifies, and credits those who shared the knowledge. Bravo. Seriously, bravo. 🙌🏾

[@SFbayArea94121]

Pretty rare these days. From either side. Offering advice or crediting who saved from a huge problem

[@roysty123]

As a past Cat mechanic working on trucks and equipment, even though they maybe the same model, Cat always has a lot of little difference between the two, you can never assume what works and is on a truck engine will work on the same engine in an earthmoving machine. Found out hard way too, thankfully no damage. I worked in a small country branch and we worked on both all the time and you picked up on the differences as you worked on them. Best thing from something like this is you learn from it and you never forget it and you pass the information on to others

[@bige.3474]

Airbus is the same way. Even though it's an A321 it's not the same as the first ones off the line. They are always changing something.

[@johnanderson591]

Cat is ridiculous on parts and love to surprise mechanics at all times. You can't anything for granted.😮😅

[@jfwfreo]

@@bige.3474The difference is that Airbus would have documentation out the wazoo to make sure that every plane gets the correct part for that specific plane.

[@Will-lt4uo]

Good catch and props to the guys who contacted you. We never stop learning in this industry!

[@AdeptApe]

Thanks for watching. Special thanks to Roc and Hell's Canyon Diesel for letting me know this was even a problem. @AdeptApe on Venmo or [e-mail] on PayPal for donations, thank you so much for supporting the channel! Amazon affiliate links to recommended tools: Knipex Raptor Pliers: amzn.to/2NaCOlt Knipex Pliers Wrench: amzn.to/3bhoYpe Cat Engine Pinning Tool: amzn.to/2Pj9VUL Cat Engine Valve Adjust Kit: amzn.to/2P8hihC Proto Torque Adapter Set: amzn.to/3sBSeOF 1/2" Drive Band Wrenches: amzn.to/3rppRmC Oil Filter Wrench Set: amzn.to/3bmQ3sj Grease Gun and Lock n Lube: amzn.to/3essWif

[@alfredpeasant5980]

Hook that dude up with a an employee of the year shirt.

[@schalld1]

Roc is my cousin, He was a member of the SeaBees where they taught bandaid mechanics. He has done it all. Well at least 99.5%…

[@apersonontheinternet8006]

You're cousin seems pretty cool. You, on the other hand... Kidding!

[@AccountInactive]

​@@apersonontheinternet8006 why would you even say this?

[@null774]

@@AccountInactivethe internet man, people out there are weird

[@joshjones3408]

Testing that by listening to the sound is actually pretty cool... really... that's how they used to test the parts of a steam engine "locomotive" all the running gear that'd how they done it with a little ball pen hammer.....I thank at 70mph the big boy's running gear is turning a 11,000 times a minute.. Great video 👍👍👍

[@banzaii6285]

Wow...good save. Kudos for reading and taking seriously the comment. This is a testament to quality of your channel, when actual techs and people who know what they are talking about are watching. 👍👍

[@brandoneldridge2626]

I have seen this in South Africa, I work on 3406 engines all the time, luckily for me I noticed that the bridges were touching and we looked into it, discovering the differences. Since then, I have seen it a few times when people did not know, it doesn't last long before it goes wrong !

[@oldcatmech]

Glad you caught it. Yes, early heads valves were shorter in length, and the bridges road on dowels.

[@KevinMurano]

Great catch send that guy some hats for the crew. We all learn everyday….. no matter how smart or how much we know…. I like to quote “we all have our turn in the barrel “ it’s special when you can read a comment and accept someone’s input. Not many people will do that. Sometimes it goes in one ear and out the other!

[@paulorchard7960]

Thats a huge save, I would never had picked up on that! You owe that subscriber a beer and steak dinner on top of the kudos you gave him! Thanks for manning up and showing this, I dont think many would have!👍🇦🇺

[@justnsaliga8518]

an expert professional shares there mistakes so others don't make them. an amateur covers them up and hides them to look better. this video has shown one thing. you sir are a true Professional.

[@oldcatmech]

Hard to believe when I and Hell's Canyon Diesel gave a comment to your post four months ago and you did a great follow up here, to get 1M views shows that lots of people had a chance to learn some thing! Great job!

[@georgecaspira]

Good on ya for paying attention and being humble enough to check your work, sign of a person who is all about getting the work done right over hiding and bluffing it. Big lesson learned for all of those who love this kind of content.

[@PETEYBOY954]

The one time in 18 years that I’ve ever seen a KZbin comment add value to society.

[@williamkelley7654]

The best mechanics are the ones that listen and learn. Great save!

[@sstocker31]

It's amazing how much knowledge is out there, and they watch your videos and add critical comments so that we can all learn. Thanks to all involved!

[@djaydeved]

simply amazing that you even looked into the matter, many mechanics woulda said "eh, not my problem" but, no, it is their problem, they should be informed of any possible problems from not finding the correct part, and you didnt know, yet, because it was 50k USD on the line, you wasnt bouta make more work for yourself and more lost revenue for the client as the saying goes "if you aint movin you aint makin money" and a broke machine dont move, and it can cost shit tons, so yeah, good on you for adressing the potential issue

[@AdeptApe]

Thanks for saying that.

[@volvo09]

Wow, close catch! Seeing those marks is pretty damn scary!

[@badgerpa9]

Glad it was caught. You get that feeling sometimes you forgot something and go back to the shop to check, Halfass Kustoms shop burned down when he was away. Glad youtube gave you the contacts that pointed this out and saved an engine. Stay safe and healthy. Weather should be getting nicer for your ride to work.

[@NIGHTOWL-jf9zt]

Being an Auto mechanic for many many years now I live by these words. I do not know everything there is to know. I have been told and taught by other mechanics that just because "I" haven't heard of something doesn't mean it isn't. I admit I will still reference material, books, internet, etc. to double check. It's a good thing you actually caught the comment.

[@markm0000]

That guys comment saved the farm!

[@adco]

And Josh reading comments.

[@peteengard9966]

Your company owes the commenters a giant thank you. I used to back off the screws on the bridges and turn until contact and 1/4 turn. Jam the nut and never had an issue.

[@pauljordan756]

High integrity on your part Josh to share this with all your subscribers! Very cool that Roc and others posted their experience and saved an expensive outcome. Great content as always… thanks!

[@niteshades_promise]

This is how youtube should work. People sharing knowledge. This means nothing to me. Just nice to see people helping.🍻

[@Wr3nch78]

I worked at the Milwaukee Cat dealer (Fabco, now Fabik) from 1998 to 2012. I worked in the truck shop. I missed it too watching your video. The info that you needed I believe its in a old Truck Engine News. I do have most of the TEN from 90 to 07, I took them with me when I left. If I find the article I will let you know. Im not sure if sis2.0 has the TEN archives. Good work Josh!

[@damiandiesel1]

Another comment from the peanut gallery: Tighten those bridge lock nuts in a vise after setting the adjustment. I know those stems are beefier than a two stroke Detroit, but those stems are bending. Some young gun will watch you and be working a funky torque wrench or not using one and will overdo it. Great video, gotta respect a man who broadcasts and corrects his oversights. You do a tough job well and set a great example for those seeking to be the best at their craft. You will make a fine shop foreman when you are all worn out.

[@melvingibson4525]

The best way to learn something as a mechanic is the hard way because then you'll never forget. In this case somebody else learned the hard way which is much much preferable. Glad it worked out Edit: you did good adjusting that bridge. A lot of people will put a wrench under that bridge to put upward pressure or use the allen as well. CAT says to just put hand pressure

[@IHVA-ir9gp]

Nice to have a community of followers that shares their knowledge as you share yours. Great video. Always learn something

[@Nudnik1]

Awesome they informed you. I try to give helpful info when I see something also. CAT service and parts data should have informed people on this !

[@mimcduffee86]

I just want to thank you for not only reading the comments, but also for giving credit to the person who wrote the comment that saved ya. There really needs to be more content creators like you.

[@2packs4sure]

You would think Cat as a company would want to preserve its reputation and fully inform,,, have a sheet that covers all these details so they don't have a lot of failures out there, it's just shocking to me...

[@ruxoneto6560]

They factor does this shit on purposes to screw the independent up.

[@fraidykat]

Cat wants to sell a new dozer...

[@jordaneimer2873]

its a double negative for them to teach normal people how to service these things going forward. Don't expect them to remember the little guy.

[@Nave6W]

No they expect you to know, and won’t warrantee it because of that expectation . CAT is notorious for that

[@ILikeWafflz]

As part of a family that has a D5 for private use, the difficulty we have finding information on them makes it clear that Cat is trying to make it hard for the independent owner to maintain them. You pretty much have to befriend a Cat mechanic to figure anything out because there is very little info on the internet.

[@peteschiavoni]

Nothing to be embarrassed about. We ALL learn stuff every day when we keep an open mind. Great job guys.

[@DarienSeminoff]

This is exactly what makes your channel my favourite on KZbin. Awesome content and professional, credible, and ethical mechanicing.

[@sirmister4411]

Yup sometimes KZbin friends are good to have nice catch guys! We all learned something today.

[@mikeenglund4595]

That cool that Rock helped you out like that ! That's exactly how you help us out !! Foe example that time i was confusedabout the flash codesthe truck was giving me ! I emailed you help and you pointed me in the right direction ! !! Keep it up Josh ! In today's world we need all the help we can get !!

[@Charger1908]

Well it’s extremely obvious that your a stand up guy and a certified professional. Kudos to you sir.

[@tom4208]

this video shines a bit of hope over me in a way, im an aspiring mechanic at only 23. I have only worked on my own cars and friends cars. I never made money doing this, its just something I love to do, and sometimes its hard because I dont know everything and I hate admitting it lol. but seeing how you didnt see your mistake and didnt know and had outside help, really helps me out and reminds me that everyone learns 1 way or another.

[@petermolnar8667]

Well if you’re into heavy equipment, start out either at a dealer where you have all the information and experience, or try to work on older machines, their manuals used to be more detailed

[@rolandtamaccio3285]

The dowells make it possible for the shallow bores in the bridges . Also, if one spring is weaker, or breaks, the dowel keeps the bridge even through its travel .

[@markmitchell457]

On another channel "Ambition Strikes" during a live feed a viewer noticed a large bolt fall out of the mechanism that supports the blade on their 1st use of a used D-8 Caterpillar dozer they just bought. They saw his warning and stopped the dozer before damage was done. They were able to find the bolt right where the viewer said it was. Because of the rock, they had to use a metal detector to find it, but it was right where the viewer said it was. Comments can be useful.

[@madeofscars9355]

When i was a 2nd year apprentice machinist & engine reconditioner i assembled a 3406 head with the incorrect valves, (we had just about every type of valve's, guide's, rotor coil's, springs, seats, ect on the shelf) i had a lot of personal stuff going on and just wasn't with it but it still shouldn't have happened... Anyway it was sent out unnoticed we got a call the following day with an extremely angry customer as they had already gone past their deadline and they had to pull the head and send it back to us 200km away to fix my screw up. At least yours was noticed and corrected before it left the shop and the inevitable big bang happened! 👍

[@KendrasEdge757]

Great for you for standin up and even admitting this let alone doing this video. Character is rare these days, but clearly still here! That’s a great thing!! God bless~

[@JeffinTD]

Wow. What specific knowledge that those heads use different bridges and valves. Super lucky. That could have been a come-back from hell.

[@user-pk2fg8im4u]

That decelerator pedal is also on the "Caterpillar" challenger ag tractors. It makes swinging wide implements around a corner much less likely to break traction on the outside track. Those ag (rubber) tracks allow much higher ground speeds, and when the machine is turned sharply the outer track is quite easy to spin. Much easier to decelerate with your foot than a hand throttle.

[@davidbrennan5]

You are a very good mechanic. Things happen and people make mistakes, you did the right thing by admitting this and fixing the problem. I have a ton of knowledge but I forget things sometimes also. My uncle couldn't read or write but he was one of the best mechanics I have ever met, some people learn from books and some learn from hands on experience.

[@mysock351C]

Potential tip when installing dowels is that you can use a bronze drift to drive them in if there are no other tools available (and the suitable drift _is_ available). A socket is nearly as hard as a standard hammer face, and it can potentially mushroom the top of the dowel and cause clearance issues. Even though some care is needed since the drift usually gets trashed after a while and can shed metal if the face isn't redressed, its soft enough that it wont damage the dowels. Of course, if a socket is all that was on-hand due to time constraints, then you have to do what's necessary.

[@wendybradford3733]

I like all the exclamation marks in the comment from Roc Schall . He really wanted you to watch out. What a nice guy!!

[@bearbait2221]

Thanks Roc!!! save of the year. Good man Roc. We need to buy him a beer.

[@DDD-us6uu]

Nice to know there are other mechanics as smart as you, not all comments are bad, you did good, communication is key.

[@timkis64]

damn, seeing the retainer marks on the bridge is a scarey sight.glad all worked out well.your a good man josh.& a hell of a mechanic.

[@Notkdenben]

I don’t know how I came across this channel all those years ago, but funny enough, I’ve worked in the manufacturing plant and now assembly line of where these Cat engines are from. Interesting stuff to see.

[@Graphics21]

Thats a great save. Learned something new. Could have been an expensive fix down the road. Top mechanic here people 👏👏👏👏👏👏👏👏

[@TheCuttz1984]

Takes a real tradesmen to drop the ego instantly and read the comment for what it is. Legendary stuff. From both parties. Well done 👍

[@philstreeter9703]

A big Thank you to Roc and Hell's Canyon Diesel for letting you know about this oddity. Great video. It shows that we spend our life learning and the person that thinks they know everything is a fool!

[@aceghost1074]

I know way to many old heads who bang wrenches and will refuse to listen to anyone. Now alot of that comes with all the knowledge that comes with years of working but some just hate being told anything. Good for you man

[@vansohren4474]

As a v8 engine builder I like to turn my stuff over (if possible) every time I assemble the next set of parts to make sure everything makes sense as it should even if it’s all been measured out . Not sure if this is possible on these big cats never worked on one but double checking everything is making geometrical sense and oil flow to all the parts is making sense is something I like to do when building . Small details you notice make a ok engine builder a great one 😊!

[@335wide]

You're speaking nonsense. Wtf is a v8 engine builder. You're not in the trade.

[@buckinthetree1233]

Everyone should take notes on getting oil, or any fluid for that matter out of blind holes. I had a shop forman once who cracked a block once when he ran a bolt in a blind hole full of antifreeze. I wasn't the one who did it, but I won't ever forget it. Anytime I'm replacing a thermostat with blind bolt holes, I make sure they are dry.

[@bobcraik7565]

That style bridge was used in Cummins engines. Procedure was to make adjustment, then lock the bridge in a vise for final torqueing to avoid bending valve stem.

[@cargotoolshop5319]

Wow, that's like loosing the outer wheel on on your favorite roller rockers on a small block Chevy, instant valve drop, I learned more than I can remember when watching your videos, forever thankful

[@masonsims8457]

To get the bridge adjustment perfect, use 2 .010” gauges, 1 modified to fit underneath adjuster stem and regular on the other stem tip. Turn the 30 deg and tighten jamb, use both feelers, press down on bridge directly over pin and check the drag. You’d be surprised how you won’t have equal drag about 20% of the bridges and have to re adjust.

[@socas_nic]

It takes courage to point out a fault, but it takes even greater courage to accept the fault! This so awesome to see! This is what the internet is all about!

[@williamshorter559]

When i was an apprentice at a Caterpillar dealership in the mid 1970s,Cat.had a monthly newsletter that was issued to all service mechanics, an issue like this would most likely have been dealt with in this monthly newsletter i would think,i wonder if CAT still has a method of informing service personl of the latest changes,modicfications etc.

[@erik_dk842]

They probably get an electronic newsletter, but it's hard to distinguish the signal from the noise. Too much irrelevant information

[@Ralph2]

I'd just like to acknowledge how we are getting a much better view from the camera than you are when doing this. Thanks for the video, it was really interesting even though I have zero hands-on experience of these engines.👍

[@AlwaysBored123]

This is why I just shake my head at people who think the dealer is infallible. Especially when it's to the point they refuse to get work done anywhere else. I'm not saying it's your fault of course just that this is a perfect example of how even the best in the biz can still screw up.

[@WillCarter1976]

The first thing i noticed about that comment was the use of exclamation points. This man understood the seriousness of the situation, and used appropriate emphasis. He is a mechanic, and a scholar!

[@JohnSmith-wb6kq]

Great vid mate, if you adjusted the bridges on a 2 stroke Detroit like that, you would bend the valves, they have a special tool where you remove the bridge , put in the tool and tighten the lock nut (or a vice works just as well), you could see the valve slightly bend at 15:12, Detroit valves are way smaller in stem diameter than the cat ones

[@mhn3773]

The goat scream was awesome. That is exactly how I feel when something like this comes up.

[@billmoran3812]

Wow! That could have been bad, bad, bad. Hopefully your shop will see your YT videos as a good thing after this.

[@ElkoCowboy888]

I'm surprised that some Technicians knew this was an issue but nothing had been forwarded to Caterpillar Technical Services? So a TSB or a new Parts update could be made to alert other Technicians. A 6 inch pocket rule with sliding bar is more accurate and easier to use in tight places.

[@AdeptApe]

That's a good idea. I have one of those too, didn't think to use it.

[@ThomasOrr-s4u]

That change of parts was done over 30 years ago and yes the were special instruction issued and noted parts do not mix. Valve stem is shorter on dowel head because the bridge dowel kept bridge positioned. When the floating bridge came out the valve stem was lengthened and we always put the slot away from the rocker shafts.

[@roballan4944]

I just built a 3406 for one of our old dozers. The original windowed the block and we bought an engine from the USA as a good core. Turns out it was a new drop in from 2009. Not 1998. The head did not have dowels. I got a new 0R head and it was setup for old T style bridges. But when I ordered new bridges I got the newer style. I just went through this whole rigamorale trying to get a new reman head that had the proper valve height.

[@billcarp3523]

Order up a steak dinner for Roc! Good call by him, for sure. You have good viewers.

[@oldcatmech]

Thanks for the thought, but it would be ice cold by the time it gets here, I am over 700 miles away!

[@jays8017]

​@@oldcatmech this is proof that comments should be left. Glad you didn't shame him like others would, and instead gave him a constructive pointer. Need more people like you.

[@lincolnengland5005]

I commend your modesty and honesty to own up to a mistake - many wouldn't.

[@ThomasOrr-s4u]

Josh, we would not interchange doewl heads with non dowelled head, when they first came out the bridges for non dowelled were with the reman head in the box, there was a service mag on this when the change was made( paper format) yes i been w dealer for 39 years. First time i built one without dowells was concerning cause the 3406 and early B was notorious for walking the valve into the stelite seats and snapping the head and sticking it in pistom top. We had customers not aduster briges correctly and bend dowel and do exactly what you were heading for, if dowel bent will skip the bridge and knock the rotator down keeper pops out on one side and we al,hate that gut wrenching thump.

[@rossbryan6102]

THIS IS WHAT IS GREAT ON THE NET! MECHANIC TO MECHANIC KNOWLEDGE IS JUST AS IMPORTANT AS THE MANUFACTURER PUTTING OUT NEEDED INFORMATION!!

[@tpcoachfix]

The valve bridges in a two stroke Detroit are adjustable. You cant loosen and tighten the adjusting screw locknut while the bridge is on the valves though. You can bend and twist the valves. You need to make the adjustments then put the bridge in a vice then tighten the locknut.

[@WestCoastChris138]

Great catch man, super cool you were able to get it back in the shop an make it right. Super cool the KZbin community helped out with that! Keep up the great vids Josh

[@lrrromicronpersei8294]

Nicely caught I’m sure any push back you received for making videos may well be overlooked in the future Would be interesting to know what your bosses thought about the situation

[@120alaska]

Good job. A random comment usually won't sway a lesser mechanic but you're not in that field. No one is perfect and no one knows everything. All this did was make you better.

[@sethnonya8566]

Gonna have to buy that guy beer now

[@Hybris51129]

Good on your shop for taking the comment seriously. I can fully understand why a supervisor would hear "A guy commenting on my KZbin channel said that we might have messed up and we need to call back that customer and get the dozer back into the shop." and just brush it off as some dumbass online especially when CAT doesn't have any paperwork backing up the claim.

[@dennisrichardville4988]

You would have got to do your destruction of the week !😂

[@manout-kidin8735]

That's why i keep watching the youtube comments section . Videos are a gem but the comments by people are even more valuable that also give different insights that to from all angles !

[@gutsngorrrr]

Wow, that was a lucky save.

[@vinyldimer]

Well this was a nice little find coming home from work. It's just after 1AM, and this is just nice and relaxing. Also, really cool to see someone read a comment from their own channel and act upon it.

[@red6423]

Greeley sending love. Thanks. Can you do a video on how to diagnose a Break in an electrical line? Love you bro. Happy mothers day to Mrs. ADEPT APE!

[@mattmanyam]

How to find the actual break, or decide if a break is what's causing the issue? Edit: South Main Auto is great at this, but you wold probably have to subscribe, as I doubt there's a specific video from him on the specific subject. Briansmobil1 show how to use a "fox and hound" type tool to trace one, but that takes a bit of experience with the tool to get comfortable with. (Assuming you're looking for the actual break)

[@kylec2476]

awesome job on giving credit to those comments.This is like a throw back to the internet forum days i loved where people were actually helpful vs just negative haters.

[@elijahrobinson2362]

Throttle brake is the term I learned for what you referred to as the decelerator. It’s surprisingly easy to use, especially once you develop the feel.

[@tomgiorgini9154]

it is a decelerator