Main Engine Crankshaft Deflection Reading | Chief MAKOi

Here's another technical video. This time, we send the cadet inside the Main Engine's Crankcase to take deflection readings.
====
Hey guys! If you want to show some support to the channel, click on the "Super Thanks" button. If you do, your comment will be highlighted and prominently displayed for everyone to see and know that you are one of the Super Supporters of this channel. It will also be easier for me to see it and reply accordingly.
Chief MAKOi
Seaman Vlog

[@MommyJennysHometown]

Keep up the good work!

[@ChiefMAKOi]

Thanks Hon!

[@biggdogg285]

Mommy Jenny, can't wait for another video!

[@xianshi8896]

@@ChiefMAKOi what is the air compression ratio?

[@AnIdiotAboard_]

@@xianshi8896 Given it's a 2-stroke, be somewhere between 15.0 to 1 and 19.0 to 1, given its turbo charged i suspect its on the lower end of 15

[@xianshi8896]

@@AnIdiotAboard_ thanks.same as locomotive engine has 16:1 ratio. love Diesel engine too much.

[@alfamontydog]

I was a marine engineer in the 1960's with the Nedlloyd lines from Holland. On our main engine ,a 12 cylinder Sulzer we had main bearing failure of three main bearings , between the last three cylinders. Oh horror, after arriving in port , Papua new Guinea, and when opening the inspection covers, shining the inspection light and seeing all those flakes of babbit underneath the crankshaft. We had spare main bearing shells, but they still had to be hand fitted to the crank journals, we sure learned how to scrape the bearing material, apply prussian blue, turn the shell under the crank, take it out again, check the bearing pattern and again and again until perfect, I believe it took us a week, 12 hours on, 12 hours off to get the engine operational again, and of course we also took crankshaft deflections like chief Makoi so well explained here. What a job, I will never forget! Thank you chief

[@gestoriaradicacionradicaci9315]

Great job your, my brother

[@Dragon_rls]

Hail to the chief! I am a veteran mechanic. Throughout my career, I have worked professionally on everything from cars, to locomotives. But I have never seen anything like this. Thank you chief Makoi. That was one seriously interesting video.

[@AllanKorup]

Take note that this is a medium size 2 stroke cross head engine. The big ones are 50% larger bore and 12 cylinders. They are seriously big. I remember climbing around inside these wonders, hammering on everything to check if anything's come loose...in 70C temperature that is...phew... Thanks for the great vids Chief ! -its nice that all the "land-crabs" can see how their necessities are moved around the world. Keep up the good work !

[@A.C.00]

Land Crabs😂👍

[@peteacher52]

@@A.C.00 I think Allan means Austin Maxis!

[@peteacher52]

My initial thought was that the movement with cross head resembled large steam engine practice - no doubt for the same reasons.

[@AllanKorup]

@@peteacher52 Well, partly. The cross head takes the sideways pressure of course. It makes it possible to have pressurized scavenge air from the turbo chargers under the piston, and also the benefit of very clean oil, free of combustion particles, in the crankcase. Unlike the Detroit 2 stroke diesel truck engine, which has very long pistons and dirty oil....

[@captainotto]

@@AllanKorup I was just noticing how strangely clean the oil looks in this engine and was wondering if it was because they just changed it. Does what you're saying mean it's always clean like that? Is there no blowthrough in the cylinders at all? I would figure at that size there must be loads!

[@daklakdigital3691]

FASCINATING! I LEARN SO MUCH FROM YOUR VIDEOS. ONE OF MY WORK ACTIVITIES IS WORKING WITH CNC MACHINES SO I'M AMAZED WE WORK IN SIMILAR SCALES OF MEASUREMENT.

[@larryoloane7579]

Chief, as a retired Marine Engineer I just want to hand out an "atta boy" for your efforts. Excellent content, very well presented. Wish I had this type of instruction, freely available, when I began learning the trade 40+ years ago. Great experience for the Cadet. He's lucky to get such tutelage!

[@Horstroad]

I'm an aircraft maintenance engineer and I love these insights into other spectrums of the engineering world. Thank you

[@mohammadmian2536]

Dear chief Makio love to watch your upload all the time. I wish you and your you tube were around back in early 1970 when I was sailing and working in shipyard as a young man. You are a good teacher all these youngster are very luck to have you around. They could and should benefit not only from your knowledge. If they don't then they are just KNUCKLE HEADS tell them I say so. Your willingness to teach in the manner your teaching just excellent. May God bless you.

[@kerravon4159]

Loving these technical videos, the functioning of a large ship is something most of us never see and is really fascinating.

[@michaelscott2789]

It truly is amazing seeing how big these ships engine's are. Its engineering bit on a whole new level to your average car engine. Just amazing. Another great vlog on a ship life and mane the most important part, maintenance.

[@jblob5764]

Big plus side... no freaking way you're gonna drop and lose parts this size lol

[@LethalMercury]

Yes, that engine is absolutely massive! Now, imagine the size of the machines that MADE those parts!

[@gregoryvschmidt]

I worked at Ingersoll Milling Machine Co. we had a milling machine that required a new building almost a city block in length just to house that monster. The bed was 150’ long.

[@williamlloyd3769]

What You Haven’t Seen - KZbin channel just posted: Engine Fire Aboard Containership “President Eisenhower”. Great reminder of why you perform maintenance and practice emergency procedures.

[@JuanAvila-bl3ml]

I remember taking and doing the readings when as a young sailor, and validating the measurement as a senior member of the propulsion division. Great video!!

[@douglasboyle6544]

As someone who has worked on car, truck, and larger diesel engines the idea of an engine large enough to crawl inside comfortably is insane. Thanks for sharing this unique perspective with us. Stay Safe.

[@molotov9502]

That slow rotation of the crankshaft is mesmerizing and oddly satisfying!

[@warrenjones744]

Hi Chief, thanks for the look inside the engine. Someplace most people will never get a chance to see. Cheers

[@matthewbeasley7765]

I don't want to come off as nitpicking an awesome video, I hope it's not taken that way! There are more reasons that slow speed diesels have a separate crosshead and a straight piston rod. In a two stroke with air inlet ports, there are three options to handle the scavenging air. 1) Pressurize the crankcase. This is what is done with small engines like weed eaters, chains saws, motocross bikes, etc... 2) Use a piston almost as long as the stroke. That way the piston skirt plugs the air ports when the piston is above bottom dead center. This is done with the famous Detroit Diesel / ElectroMotive Diesels, along with many modern marine medium speed diesels. The big disadvantage of this design is it makes the engine longer. 3) Use a cross head and piston rod with a seal. There are several good reasons to want to not pressurize the crankcase. With big diesels like this, the inlet pressure is quite high due to a large turbocharger. The charge air is also quite hot, even after aftercooling. Plus having the scavenge air in the crankcase means the lubricating oil gets into the cylinder and makes soot. Another advantage of the separate crosshead is the crosshead can get excellent lubrication compared to a piston, and the surfaces can be optimized for the job. A piston is only oiled on the down stroke, a cross head can be lubricated on both directions of travel.

[@brnmcc01]

Another huge advantage that you left out, is the fact that a stationary (meaning only moves up and down, no side-side motion) piston rod like this can be sealed off from the crankcase with a packing gland, keeping the filthy blowby gases out of the crankcase lubricating oil. People always ask me why we never had to change the oil in a big engine. This is why, it doesn't get blowby junk into the oil, so it's just like oil in a car gearbox, lasts forever if kept clean, not overheated etc. Another big advantage is you can use a special consumable low-ash type of cylinder lubricating consumable oil, so the piston and piston rings has their own oil, and the crankcase, and rod and main bearings use a separate oil supply.

[@matthewbeasley7765]

@@brnmcc01 Yes, forgot to include that. I did mention no lube oil in the cylinder, but left out that it also means no blow by in the crank.

[@klausnielsen9419]

i was working at MAN diesel frederikshavn denmark. i turn/milled cam shaft for the injection pumps for the 2 stroke engines, and camshafts for the 4 stroke engines valves and injection cam´s. it was amazing to see a brand new engine being started up for the first time, and thinking about some of the parts i made will be somewhere on the oceans for several years . very impressive machines, and imagine, even it is big, the tolerances and presicion is tight and precise as in a motorcycle engine. all workers there was very proud of our products.

[@jjwwqq]

You and the entire crew work so hard! Thanks!!

[@leekralovec2263]

Thank you Wonderful video creation

[@johnkelley9877]

Simply fascinating how big these engines are! Thanks for sharing this.

[@FloridaJack]

You are a good teacher/instructor/explainer ... your continuing education and entertainment is appreciated. Thank You, Chief.

[@randywl8925]

Those engines are an incredible piece of engineering.

[@johnbullard2129]

Simply love it. Great content! Thanks

[@TheAfterWorkGarage]

Great video, and really cool to see. Thanks for sharing!

[@brucelytle1144]

Jus sayin' Chief! You do a good job showing what it takes to make the world go round! I used to sail Chief Electrician on APL C10's. I held a 3rd's Steam License at the time. I always asked my Chief Engineer if I could 'play' Engineer when we were LA where we replaced 2 cylinders of the Sultzer 12 cylinder engine. They were also doing an alteration on the cam lifters. I did a video of one time, but part got erased with a video of a Dutch guy in Kobe, explaining the history of Santa Claus through the different cultures! What can ya say? I worked for 5 (8+ total) years in the US Navy, mainly 38a Shop stuff. Fixed em, built em, and sailed em for another 40 years. Most people don't understand how massive and powerful these engines are, and the precision that is required for them to operate at the power levels they do for prolong periods. That said.. I still prefer the hum of turbines over the thumping of a diesel! Keep it up!

[@elcheapo5302]

It's amazing how big all the components of these engines are. Thanks, Chief!

[@hevendranarayansamy2793]

Great video. Thanks for sharing

[@mattc.310]

Cool video Chief. Thanks for showing us a glimpse of your world.

[@intellectualiconoclasm3264]

What an absolute beautiful piece of machining and engineering.

[@samueljoejr5191]

Great information, thanks, Chief.

[@xcellerathor6226]

Thank you for these interesting reports of a for us living on land different yet very important world! Every report is tremendously informative!

[@IstasPumaNevada]

That's a very elegant way to check for misalignment and bearing wear. I love it.

[@icare7151]

Awesome l! Thank you for the education and great quality videos!

[@brainstorm8702]

Keep updating! Thank you

[@richardlincoln8438]

Very interesting, thanks for sharing Chief.

[@paulprescott7913]

Brilliant Chief thank you.

[@cecilwilson5442]

Remember when in the early 1993 being in Harland and wolf when an B,&W engine getting built in the first off. A series of suezmax tankers ,, now I work doing ship repair but ferries have various engines ,,V16 7 &9 cylinder engine nothing big like tankers ,, but it is important work and a good job ☘️☘️☘️☘️☘️☘️☘️ from northern Ireland great video 😁😁😁

[@markthompson9914]

Just think of the size of the CNC machine that machined that crank WOW ✌️🇬🇧

[@nalakprince6376]

Awesome video with crystal clear narration. Thank you Chief... 👍🙂

[@zulmarin]

Thank you Cheif Makoi.. For bringing back the memories..

[@irishpsalteri]

I am descended from mariners on my father's side of the family. I love learning about these things. Thank you.

[@blackbuttecruizr]

Super interesting connecting rod configuration.

[@javierrflores]

Great content ! Thank you sir!

[@xKmotx]

This was fascinating! Thank you!

[@gordonwallin2368]

Cheers from the Pacific West Coast of Canada.

[@torgeirbrandsnes1916]

Great vlog as always! Looking forward to the next one. Happy sailing my friend!

[@rayoflight62]

Great video. Thank you, Chief, for both your engineering skill and attitude to teach everyone about naval engines; what you showed in this video is truly impressive...

[@hgc1581]

As a diesel mechanic, ships and ship engines have always amazed me. Such an amazing machine, the size blows me away

[@rexmyers991]

Another very interesting report. I learned a lot. Thanks, Chief.

[@nutsnproud6932]

Thanks for the video. I learned something really interesting today. Best wishes to yourself and all the crew.

[@edshelden7590]

Great story. Very well done.

[@CHEVYK10]

Awesome video Thanks for sharing chief

[@Incognito-vc9wj]

Quality presentation as always.

[@kwujelilionel2480]

Thank you Chief MAKOi for all that you do. I keep learning something new everyday from your contents. Recently kicked off my career as an engine Cadet and my appreciation knows no bounds🙌🏾

[@ttm2609]

Thanks for posting Chief❤❤❤❤

[@nainitalism]

Reminds me of my days at sea, loved it. Never worked on these modern engines, loved my Doxfords !

[@donnakawana]

I so enjoyed this one.. reminds me of learning to work on my own lil sail boat engine a Perkins..it's amazing the size an work to keep everything tickety-boo... ✌🏼💗😊❣️

[@brainstorm8702]

Great video learning thanks for sharing

[@ChasOnErie]

CRITICAL WORK BY OBVIOUS WELL TRAINED PEOPLE … what a great boss and mentor is Chief …💪💪💪💪

[@schullicwb]

Best video I've ever seen upon this subject. Congratulations, and thank you so much for sharing it with us.

[@terencehawkes3933]

Fascinating Chief! I had no idea you had to do this as part of regular maintenance. Egad those engines are huge and very beautiful inside.

[@deniwijaya629]

Thank you chief... Good job

[@dgordon9645]

My old man was a warffie in Melbourne VIC and when they had big jobs on we were hired as casual labour when I was 15 I was lucky enough to work inside the bore of these massive engine on a ladder with hammer and chisel chipping away the carbon build up I remember putting my elbow to elbow touching the inside diameter even back then I thought how many people would ever see this and getting over $100 a day another job was pulling a 5 ton altanator with blocks and chains awesome experience.

[@lilo7019]

thank you for sharing

[@ossiemac]

I know nothing about stuff like this, but find people's knowledge and skills fascinating. Thank you 👍

[@williamthurmond4940]

I can’t imagine being able to crawl around inside an engine. You have a fascinating career. Thanks for sharing it with us.

[@frankleonard6570]

this is truly amazing!

[@cubearthx]

I'm studying for my oral examinations so thank you for providing me with guilt-free youtubbing.

[@964cuplove]

The fact that you do these regularly is just amazing, like in a car this wouldn’t really be done as it’s easier to measure the main bearings and the crankshaft diameter directly Very cool to know these things !!

[@toolbox-gua]

This is very interesting. I had the opportunity back in 1991 to visit the engine (room) of a large ship. Our port was the first port of call on the ship's life with cargo and we sway a couple of engineers come out the "opening". For us visitors seemed strange. The chief engineer explained they were checking tolerances. Thank you for sharing your knowledge.

[@associatedblacksheepandmisfits]

During a 10yr survey on a medium sized coaster GRT 1600 , B&W alpha V18 of around 2610 B.P.H. The chocks were to be renewed so ,old ones removed , holding down bolt holes blocked off whilst the resin set and after web deflections checked found out someone had used short lengths of broom handle to block holding down boltholes instead of cardboard or the like. Whole lot had to be redone....red faces as company supervisor hadn't noticed . oops. Used bunkers not heavy oil ,but still had all the pipework and heaters for heavy . Smooth as silk once past critical revs , air start ,mated to shaft genny and then cp prop. Took us safely through 87 hurricane in North Sea as only engine , no aux, 3 day trip took 6 due to massive seas ,can't remember LOA but were looking up at the wave tops from the bridge. M E never faltered once. Lost fair amount of deck cargo tho, all dressed timber ,wires and bottle screws just weren't enough for those extremes . Only Kent screen was working after waves took out bridge wipers..exciting stuff at times...

[@pnwRC.]

FANTASTIC video!

[@RailFanRob]

Very informative. I'm an auto mechanic so this quite interesting to me. Great footage!

[@kiwizz2177]

Love your videos mate , great tech !

[@FixNewsPlease]

Very interesting. Thanks chief!

[@a222parker]

Beautiful

[@idroadking]

Very interesting and informative as usual, sir.... love the channel!

[@ElChavacano22]

God bless sir Chief and the engine team, also new learnings for us beginners in this Profession 🙌

[@antonylawrence7266]

the sheer size of it is so mesmerizing

[@juliepepper3205]

Wow! Thats a big engine, dangerous parts and must be very precautioness, awesome, never imagine les then this, you have machinery so clean, congrats to all of your crew & hanks 💯👌👍

[@kebo57]

I want one of these engines to put in my 3/4 ton Chevy pickup!! Seriously, anytime you can walk around inside the bowels of an engine, you know it's freaking massive! Great video, though, learned little bit about these massive engines.

[@ats-3693]

It's so crazy that you can walk around inside the crankcase around the crank and big ends.

[@toddtaylor6110]

Keep them coming!

[@KissedSomeFrogs]

Thanks! Always learn something new watching your videos! Cheers, to the Team!

[@ChiefMAKOi]

Thanks for your continued support!

[@sanguma]

very cool views into the engine!

[@warrenscarlett9302]

Keep up the good work mate watching from Australia 👍👍👍👍👍👍

[@defel1]

Excellent.

[@bobbowles]

Thank you for all you've shared.

[@ChiefMAKOi]

And thank you for your support 😊

[@biggdogg285]

Good job men, thank you.

[@petewilliams7425]

Excellent video, very informant,looking forward to more keep up the good work.

[@Neo-po2xw]

Chief please do make a seperate videos on Crank case explosion with some videos like you have shown here

[@petermiller9712]

fantastic video

[@dougthomson5544]

It must be fascinating the first time you are inside an engine. Very interesting, Chief!

[@TheBmco99]

Love these videos I worked on these big motors here and there you definitely know your business good job 👏🇺🇸🇺🇸

[@watchtherocks12]

Amazing.

[@LBG-cf8gu]

great video! kudos to the camera guy. got right down to the nuts and bolts. love this channel.

[@corporalpunishment1133]

What a great video thanks for your efforts and really good job on the video edit and overall production. Cheers from Australia and a new subscriber. Thanks again👍

[@hermannstraub3743]

Engine Temp. 42°C, in THAT hole with the engine turning: No Thanks! Great Respect!!

[@markthompson9914]

I’d love it ✌️🇬🇧

[@brnmcc01]

42 isn't terrible if the humidity isn't too high. I remember being in the engine room on a steam powered tug, the temps in there was more like 50C. And very humid, because there's always small steam leaks around. But the fans that blew in fresh air from outside were pretty powerful, and it was tolerable. I always kept a water bottle nearby though, it's not good to get thirsty, that's when you get dizzy and make mistakes.... without that fresh air would be absolutely miserable.

[@firemedic2572]

Chief.. the amount of stroke on those pistons is very impressive.. Much love from Michigan here in the US.. Keep up the great content. Love when you guys get to BBQ and have some relaxing times on the deck..