Main Engine Crankshaft Deflection Reading | Chief MAKOi 

Keep up the good work!

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

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.

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 !

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.

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!

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

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.

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

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!!

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.

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.

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

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

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

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

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

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!

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

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...

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.

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

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

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

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

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

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🙌🏾

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

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

Thank you Wonderful video creation

What an absolute beautiful piece of machining and engineering.

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 💯👌👍

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

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

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

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 !!

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 😁😁😁

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

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.

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

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

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.

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

Simply love it. Great content! Thanks

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

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

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

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

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

Great information, thanks, Chief.

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.

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.

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

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

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... ✌🏼💗😊❣️

Great video. Thanks for sharing

Quality presentation as always.

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

Thanks Chief your videos are educational and just fascinating. You must have been one hell of a instructor at the academy.

Very interesting, thanks for sharing Chief.

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

Awesome video Thanks for sharing chief

Those engines are an incredible piece of engineering.

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

I would like to say how refreshing and relaxing it is to be able to navigate 🙂 away from the videos and toxic comments on the situation in Ukraine to the Chief's Channel to watch a new video. Thank you so much Chief 🥰 .

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

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..

Super interesting connecting rod configuration.

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

Great story. Very well done.

Nice vid. safety glasses are a good asset when looking up at things dripping oil. Another good vid thanks Makoi

So beautifully clean 🙂 ! Nice guitar music 🙂 ! Well done Chief and your team 🙂 ! I hope no-one was injured or killed when those crankcases exploded !

Thanks for this. It's something us land-locked mortals have never thought of.

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

I wouldn't want to be around when an engine blows out!! 😲😲 As usual, another well put together video showing things I never knew happened on a ship. Very informative.

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

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

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👍

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

Cheers from the Pacific West Coast of Canada.

Thanks for posting Chief❤❤❤❤

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.

Love your videos mate , great tech !

Great video learning thanks for sharing

Hello Mako i igood to listen you excellent video. Thanks for sharing.highly. professional job. Never seen befor .thanks.

Very interesting video!

Great content ! Thank you sir!

i presume that an engine fitter has a big part in this work, i can just imagine how hard is the job of my husband..thanks chief for this informative vlog.

fantastic video

Thank you verry mouch for sharing this, also i like the music style alot ❤️

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

very cool views into the engine!

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

Those pistons are HUGE! Sure a lot different than working on your lawnmower engine! 😄👍👍

Keep them coming!

FANTASTIC video!

Brilliant Chief thank you.

very cool video thanks chief!

Thank you chief... Good job

This was fascinating! Thank you!