Cylinder liners and pistons installed on the detroit diesel 8v92TI Hatteras 58 foot Yacht

The engine rebuild is going forward in this yacht. Rebuilding the engine in the hull is a tight fit and a very difficult job. The yacht owner is helping do a lot of the work himself including cleaning and setup. We are assisting him a day or two a week on this project. Fingers crossed that the o-rings seal properly. If they don’t seal this whole project will be for naught.

[@Bread996]

Working in a marine engine room is such a pain! I made sure to purchase a yacht where I had access to all sides of the engines. But just because you can get your hand on a part and touch it doesn't mean you can get a wrench on it and turn it! Great work as always.

[@mayshack]

I'll keep that in mind next time I'm yacht shopping, thanks.

[@BlackPill-pu4vi]

The one silver lining to this job is that the owner doesn't care about the interior because it's all getting redone anyway. I could see BGM turning down the job if this was a pristine yacht that had to be kept spotless while the repairs were going on.

[@danielmcpartlin6526]

Engine room yoga

[@kevind767]

Boat Yoga!!

[@robertsawa3407]

Inline engines only no V blocks!

[@vongroven115]

You are so lucky to have Jonathan working with you. I am happy he is talking on camera more and special props for him giving you a break on putting those jugs and sleeves in the block to save your back.

[@apajohn2]

Johnathon has come a long ways his dexterity and movement with purpose for each task shows his confidence Good job 👍 😊

[@bartfranklin1358]

He’s on his way to being a Master Mechanic!

[@13699111]

Excellent mentor student combination.

[@lateefcarrere1649]

I watched your in-frame rebuilds and thought those were tough...I stand corrected. In-boat rebuilds are tougher, and I have to congratulate you on the work, and the owner on the solid cradle he built for the engine.👍👍

[@danielmcpartlin6526]

So impressed by the intelligence and attention to detail required to be a mechanic.Most essential members of society and I think the level of prestige should be higher. They are to me anyway

[@liamhenry8164]

I remember when I was young I worked on a sightseeing boat during the summer in Chicago. They used to do tours on Saturday mornings once a month of the south branch of the river system. We sucked a super charger and had to run on one motor back to Chicago main branch. Cummings came out on a weekend and holiday at that. Worked in the engine room cleaning out the junk from the cylinders. What an experience as I was his gofer that weekend.

[@MrPhotodoc]

Sounds like a cool job.

[@BigDaddy_MRI]

Amazing rebuild!! This is a GREAT series. Can’t wait to hear this engine fire up after this rebuild.

[@daveamo3237]

To add to that, in the late 1980s due to extenuating circumstances, I ended up finishing an inframe rebuild on one 8v92t in a cab over. That was difficult enough. I cannot imagine working under those conditions. Kudos on another great video.

[@18robsmith]

Many an engine has been built on the kitchen or dining room table. Not many have been built on the master bed on a yacht - that engine should be proud of the treatment it is being given.

[@m35a2ww]

Back in the day, on 855 Cummins engines, when the lower receivers or the upper counterbore were pitted to the point that it was questionable, we used JB weld to fill and smooth out the areas that we thought might be an issue. It used to be a very common practice. I can't count how many I took apart that had a JB weld fix and had no issues with the filler falling out or degrading.

[@mshort7087]

As an electrician, I have turned down a few jobs on yachts. Nothing is easy on them. Seems that no matter what you are trying to work on, they built the whole boat around it. I admire y’all’s determination to deliver a top notch job to the owners

[@robinengland5799]

You guys do amazing work! You have an excellent young man helping you, I would be sick as a dog hanging upside down like that. Your boat owner is fortunate y’all are working on his engine!

[@robertprice7246]

I can't wait to hear this Baby Sing !

[@Charger1908]

Wow 250 ft lbs with that short torque wrench! Johnathon made sure he had his wheaties this morning.

[@BuckeyeMCS]

So glued to this series like no other

[@urbo42]

Those pistons look so pretty when you put them in.

[@manfromyard3143]

How much do they weigh, the piston and case?

[@grahammonk8013]

One of my favourite authors has a couple of book series which talk a fair bit about boats. In both examples, a central character has seriously negative opinions on Volvo marine diesels, at least about their maintenance access. I can't help making comparisons when watching this saga. From your other videos, I'm glad I'm not a bus mechanic, and now, even more, that I'm not a marine mechanic. My admiration for your ingenuity and dedication continues to grow.

[@bartfranklin1358]

To help with O-ring sealing, try Dow Corning 55 O-ring lubricant. It aids with O-ring installation and slightly swells the o-ring for better sealing.

[@MrPhotodoc]

What's cool about this is it's actually do-able. Taken one step at a time it seems easy. If you know what you're doing of course. Thanks for taking us along.

[@markmonroe7330]

Excellent presentation. Thank you. Really enjoying this series.

[@garyyoung-b2v]

that young man is a real trooper. thats hard work torquing those main cap bolts in the small space.

[@dont-want-no-wrench]

the monkey got lucky with that one, a worthy apprentice

[@Omegaman1969]

Man that blue sky, months are grey here in the UK.....You guys are so lucky to see the sun daily.

[@Limeylad73]

X Cornish boy here…..I enjoy my 300 days of sun in the USA 🇬🇧🇺🇸

[@tomscott4723]

Nice to get away from the shop once in a while, reminds me of the nomad days! Thanks!

[@BusGreaseMonkey]

Almost 4hrs of driving every trip. So it’s a long day when we go.

[@H4rleyBoy]

I hope that this is a successful job, good to finally hear Jonathon talking, he has a pleasant voice too.

[@TheNearlyFamousMrHobby]

Man fingers fingers fingers crossed! Let the diesel gods favor this rebuild!

[@kevinamundsen7646]

Total professionalism all the way down to the plastic tubing over the connecting rod threads and generous use of high quality assembly lube. Careful attention to silicone water jacket o-rings and no coolant leaks means this ocean-going beauty may soon perform to original specifications and expect a long life! According to the Parker O-ring Manual, please allow 48 hours for o-rings to fully seal into static grooves before pressure testing.

[@TimothyCamerl-uo3yj]

This guy is the king for this stuff good job Americans doing American things!

[@stevezwemer1262]

Hard to imagine working on that Detroit in the belly of a yacht. Great job. Don’t envy you but very impressed.

[@jkidd2007]

I love the changes that you keep making to the outro video.

[@irgski]

With this engine position, this appears to be a "young man's sport"!

[@craigsowers8456]

New Bearings are just so purdy !!! Tell your assistant that you're not going to charge him a Gym Fee for torqueing to 250 Lbs. LOL Great job guys !!!

[@rickhay9782]

That yacht owner is no lazy slouch....what a fine crew ..aye matee an extra tankard of grog for this job here fer sure .... 🍺

[@wesleypulkka7447]

Scott + Jonathan, wow that engine has been transformed by you guys! From rats' nest to reliability in a relatively short time! Congrats!

[@donriedl3484]

Very good series on the yacht. Tough conditions but your getting it done . Thanks for sharing the progress.

[@bobsanders2353]

Quite obvious the boat builder "laid the Keel first" and then "Installed the two engines" Great video, thank you!

[@thisnthat3530]

250 foot pounds with that baby torque wrench would require about 100 pounds of force to achieve. That's a lot, especially in those contorted conditions and for that many bolts.

[@daveamo3237]

Over the years I've overheard conversations from ex Navy mechanics. Generally the most advantageous route for removal and reinstallation is through the deck plate. Old engine out, new engine in, welded deck plate. Out to sea they can't take the down time.

[@BusGreaseMonkey]

Government paying the bill vs real person equals different repair techniques

[@Thuddster]

One of my friends was a top-notch marine diesel mechanic. Some of his stories of on-site engine work on crabbers, tugs and long-liners out in Dutch Harbor and Unalaska were torturous adventures to say the least. Stuff ALWAYS seems to break when the weather is at its worst, and of course that's when he had to fly in to do the work. He got paid really, really well, but Man did he earn it!

[@ThatGuyFromArizona]

So satisfying to see those liners go in after all that prep work.

[@shopsteward6292]

I usually installed the liner inserts in the counter-bore, most of the time I would use insert DDC# 5148611 O/S insert. Then I would check liner heights.046" to .0465". I rebuilt a lot of them, but never in a marine application. I bet your sore after a day working on a boat, Kudos to you guys!

[@BleuCollarFndryMTL]

That closing song is really catchy. Sticks in my mind!

[@robertsmeal8193]

What a job! Good deal. You the man!!!

[@douglasmayherjr.5733]

I’ll be crossing my fingers as well during the pressure test. Thanks for the Videos. Still doesn’t look like any fun.

[@lloydrobinson7081]

great work to the both of u guys, keep the lips coming

[@jeffcooper5789]

This one engine will get him home. That's what I understood. Interesting video.

[@gregculverwell]

I'm still amazed that the boat was built without the facility to remove the engines. Ships are built that way, but the engines are built inna way that enables most major repairs to be done in situ. If an engine really has to come out, it is relatively simple to cut through the hull and replace it.

[@imchris5000]

most yachts of this size require cutting out the deck to replace engines its why you can buy old yachts like this for pennies on the dollar

[@sammaze2103]

Diesel Engines will run for several hundred thousand miles when properly maintained but when they are let go it’s like opening up Pandoras Box and you better have a pro like Scott and Johnathan or you have no chance of getting a positive repair! People don’t realize on these yachts the engines are all put in before the upper part of the boat is fabricated ! I have been in a boat yard at West Palm Beach in Florida and watched them cut a hole on each side of the boat with a Chainsaw to get the motors out! That is the way they all are built about 50-60 feet ! It’s something to watch but when they are re-fabricated you would never know what was done ! That’s where big bucks are Spent !

[@lordkevork]

Looking great!👍🏽

[@andrewkaras8001]

Great work guys looking good👍

[@acehart2]

I hope you guys do more like this it is awesome

[@josealdecoa2417]

New rugs and floor tile is a lot cheaper than taring down the decks to pull it out. Wood craftman are not cheap when it comes to yachts plus you have to refinish the outside.

[@Lippyandy]

Hiya wow looking great .im from the uk .and i use to work with a guy who who worked on 18 wheelers out in winnapeg .some times when we was rebuilding an NT 855 .we would tell the customer his lower seal areas are pitted . And need new lower cylinder liner areas repairing. They would go omg thats gonner cost . So sometimes we use to put sealant around those liner seal areas .it use to hold i would love to be helping you chaps out there .

[@brucerazor5202]

My truck has a Cummins, love those diesels

[@sammaze2103]

Anybody who ever said Diesel Mechanics was easy must be smoking something???!!!! So many shops would never take a job like this ! Scott and Johnathan are quite a team !

[@imchris5000]

marine diesel is a whole different pay grade

[@jtbuilds9176]

Back around 06 and for about 5 years I did this same exact work. Paid $10 an hour and could barely afford tools to do it. Ended up going automotive instead for 4 times the money and be able to afford tools and gas to get to work.

[@91rss]

instead of RTV like in the oring lands to help with pitting sealing get some fuel capable aerospace sealant thats on ebay generally the B1/2 start to set is in 1/2 B2 is 2 hrs, and it works really really good, friend did a weeping case split line after draining oil for a day just by applying over the seam on the outside way back in the 80's still hasnt wept since.

[@stephenrichards5386]

What a horrible job. You guys are genius

[@Thuddster]

I'm curious, how did you get those corroded top grooves so clean and squared? Brass wire wheel, solvents, metal polish such as Simichrome? They were so pitted and marred, and now they look almost pristine! Nice work BGM, and that was done in a tight, cramped area and on the road, too. Props to you! (Yes, a boating joke was made 😅)

[@miked5563]

My dad had an very good vehicle mechanic rebuild our marine engine. Same way you guys are doing it. The marine side of the engine was left up to someone else and it blew the engine. The owner of this yacht is gonna kill this rebuild.

[@4sl648]

I cant watch this and not think of the movie Sand Pebbles. Unique work environment.

[@ronwade2206]

Know a auto tech in Flagstaff that found a boat customer with a house boat in Page, a fishing boat down Mexico way and a Yacht in San Diego. He quit the dealership and has a much better income and Tan now!!

[@isickofit]

Really interesting side quest!

[@robertusa1234]

I would definitely use some gasket sealer on the pitted groves

[@BusGreaseMonkey]

I asked him if he wanted us to use anything. They did clean up better than i expected.

[@jamesmckenzie3532]

They did that and it was a right mess when the liners were removed. It leaked as well.

[@robertusa1234]

@@jamesmckenzie3532their are way better products to use then rtv silicone

[@robertusa1234]

@ their are a lot better products then rtv silicon for cases like that

[@jamesmckenzie3532]

Looks like that engine cleaned up nice.

[@renoflames]

That is a hard job. Me I would have dry docked the boat cleaned the hull and have a crew come and dismantle the upper portion of the boat and remove the engines and send them to you for a complete reman. I do not like the pitting on the Block you showed it may work now but later it may start leaking under heavy use. The block in my opinion looked pretty rough based on your photos. That is a 200k boat I hope he got a very good deal considering the other engine the same rebuild will have to be made on that one as well. Just my own opinion. Those repairs are very expensive. It is a very nice boat really nice. A good piece of History.

[@BusGreaseMonkey]

If money was no object that is what i would have done as well but luckily i don’t have to worry about big financial decisions like that. Try to fix what you got

[@gstranman9677]

I've done in frame rebuilds in tractors plus a few in a truck, and I honestly don't know if I could do that today, 20 + years later. A yacht looks like a real job to tackle! Are you going to show setting the rack and all the trials and tribulations of that process?

[@JohnSmith-qi9qs]

Nice job!!!👍👍

[@ChrisMcCutcheon-wj2pp]

Multipliers were the best thing our machine shop bought, 3 yrs later they bought a hytorq, hydraulic torque wrench,

[@markflynfloat6779]

Great content

[@Brez1969]

I was stressed out this vid, better you than me, I know some diesel mechanic, strange lads but cool 🎉

[@gersonhay984]

I wish the best for that Guy. I'll Take a Nice Mahi Mahi.

[@arthurbiringer5676]

Anyone planning on purchasing a yacht should always have a Surveyor inspect the vessel thoroughly that way disasters like this won’t happen to a savvy buyer.

[@ineverhadthemoney7857]

great job as is every day life

[@gwharton68]

Must be nice to young and so nimble. Great job.

[@nedflanders7352]

Please make a final video of the final build and engine running.

[@chrissmith513]

Working on that motor in such a confined space no fun ! 😊😊😊

[@firemedicseven]

A torque multiplier would really help torquing those mains.

[@minibikemadman]

love these videos.

[@billthompson4877]

Hi Scott. After this JOB you should apply for your Gynecology certificate

[@SkypowerwithKarl]

Yeah, working in an engine room is a giant pain. I had to get between my fuel tank and the hull. Got back there and got done with what I needed and started to back out when my back went into spasms. It took me about forty five minutes agonizingly creeping out. No around for miles and no one could hear me if I did scream. Next time I’m in a situation like that I’ll bring coms.

[@whiteyfarm]

What a gawd-awful place to work. Great video. What did you use to edit out all of the swear words. I have been on my back under the motor scraping the oil pan gasket off with 1/4 inch steel plate jabbing me in the ribs. You'll see the bruises tomorrow morning. The owner will learn about the two happiest days in a boat owner's life.

[@BusGreaseMonkey]

We don’t really have tempers or swear much. Usually i swear more in amazement and extremely rare to do it in anger.

[@gerardmccarthy2432]

Do you do a liner protrusion measurement /shim adjustment for head gasket crush to cyl head and liner? Many thanks for taking the time for the videos and all you do,

[@zacb7427]

Great question Gerard the 2 strokes are slightly different but generally you measure the top of the sleeve flange and the top of the block that measurement must be .45 - .50 below the surface of the deck for each cylinder they all need to be within .002 of each other or the block will need to be resurfaced and shimmed you can see they did use shims under the sleeves.

[@Netstarr88]

And for your next one , You now have to do that other one while underway!....😅

[@MartinPGrindrod]

eeeek not sure I liked the way the second liner just dropped in passed the o-rings - I am guessing its going to get a pressure test at the earliest opportunity before the build goes any further.

[@BusGreaseMonkey]

None of them just dropped in past the orings

[@tomallen6906]

Look @6:58 again, something like wire slides down along the liner as you pause putting it in. What's that? At my first look I thought 'ring' but that's impossible. Hat's off to you!

[@Chris-bg8mk]

Oh boy more boat content!

[@troycarothers8254]

Scott, have you gotten your sea legs yet?? Nice work there!

[@GlennGraham-q8t]

Enjoyed ❤️🇺🇲💪🌞💯👍

[@olduhfguy]

Tight liner-to-block clearance. Takes a gentle but firm 'touch' .......

[@ruthc8407]

PITTING in the cooling system. That's the trouble with well-used marine blocks.

[@dougnorton5143]

Even, even if they seal at the moment, once that engine gets hot and the cooling system is under pressure, that will be the test! And if it does hold at the moment, I don't think I could trust that engine for very long!

[@BusGreaseMonkey]

When hot the liner expands making it seal tighter. Cooling system is 7psi. 180° normal operating temp.

[@dougnorton5143]

@@BusGreaseMonkey Here's my thinking for my comment. With the condition of the block surfaces where the seal is expected to seal the coolant, the rough surface condition will wear down the seal due to the roughness in short order due to the expanding and contracting of the liner. Now that is just speculation on my part but seems like a reasonable assumption to me. But from where I sit, you and your crew seem to be taking all the measures you can to make this repair a success!

[@stripersniper1531]

Have to love these ole diesels. What are the sleeves made of ?

[@Limeylad73]

Scott’s magical and should have worn the bunny suit for this job 🐰

[@gdownz1044]

BOAT GREASE MONKEY👍🐒🛥️

[@fw1421]

What a royal pain. Every one really earned their pay today.

[@DerwoodBones]

Cant Wait

[@williamhague2768]

Ah… the original BGM Ditty…👍

[@HelicopterDad-u5b]

It's a young man's game..

[@imchris5000]

if the owner pulls the engines in florida most of that interior will get cut out anyways to get the engines out

[@williamgurtner4759]

Scott, Long time subscriber here. So I can understand this. You pull a vacuum on the wrist pin covers so the assembly doesn't lose oil pressure. How does the wrist pin get its lubrication? I didn't see any feed holes on the upper rod bearings. Does it feed from around the rod bolts then?

[@K5ALLEN]

Because Detroit 2 stroke pistons have rings at the top and bottom of the piston. The space in the middle is the wrist pin. It is lubed from below by the cooling jets of oil. If the pin caps are not sealed it will suck the oil from the cooling jets through the pin into the combustion causing it to burn oil, . I hope this helps

[@BusGreaseMonkey]

Up the piston rod

[@timf6916]

Just WAY to cramp. Good luck.

[@davidowen888]

More Yacht Yoga😮 one thing bought those big boats ya can't just throw a lil kicker motor on em and Gitt'er home🚫

[@davidboyer5362]

From bus to boat what a fun job. HAHAHA🤣😂🤣😂🥳