Our Customer's Yanmar Kept Blowing Head Gaskets

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A quick video on a three cylinder Yanmar that was brought to us after the customer kept experiencing head gasket failures...
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[@JAMSIONLINE]

Thank you all for watching this quick video! 😊 I threw a few stickers up on the website! 😬 Check it out! jamsionline.com/jims-automotive-machine-shop-inc-jamsi-online-3-x-2-sticker/

[@67MGBadventures]

New sticker looks good!

[@brianbible8415]

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[@prinzeugenvansovoyen732]

for a moment i thought why so fine tollerances in automotive maschining - then i remembered you use banana dimensions and 1/1000 for you is only a rough dimension of 0.0254mm im working in QC - producing dosing and packaging equipment for medical and food industry as well as purpose built fine mechanics - with maschines like the newest DMG Mori and KERN-CNC positional tollerances of 0.02mm and finer for holes and diameter tollerances of + - 0.0025mm Roughness RZ of 0.15µm (micrometer) on parts with up to 6tonns - ever had to let a work piece acclimatise back to exactly 20° between milling work steps to be within tollerance and needing to leave it in the maschine to not have a reset error? tension relieve glowing after rough milling

[@dukecraig2402]

Hey Jim, just out of curiosity what are the materials that the seats are made out of? I build street performance air cooled engine's and Stellite is what's used for our applications both intake and exhaust.

[@boonev9897]

Would you do a little tecumseh h50

[@tinkmarshino]

Outstanding boys.. thanks by the way for doing this.. at 70 now I had to give up my auto repair work ( personal not pro shop) 4 years ago. My body can't take it any more.. But my love of motors, which started when I was 12 years old rebuilding lawnmower engines through the 60's and 70's hot rod phase, up to just general restoration/repair help for friends and those that needed my help. I really enjoy seeing the old stuff happening still.. I miss it a lot and now can get a bit of a fix through you guys.. Carry on and thanks again..

[@zeke2566]

Danm man,get back in it 70 is the new 30,just turned 70 and racing stand up jet skis......

[@tinkmarshino]

@@zeke2566 Zeke, wish it was that easy.. But my body is now paying for my adventurous youth. The mind is willing but the body is done already.. But carry on brother.. it is good to hear some of us survived.. But not to many regrets.. I have a full, active and kick ass life..

[@jackheinemann8780]

Dad is 70, still rolling around under cars. He's got a mate who's 73 with hands so bad with arthritis its amazing he can feed himself, He rebuilt a grader last year. Get back at it, doesnt have to be cars or graders, motorcycles are excellent too

[@Prebbets]

Well said.

[@tinkmarshino]

@@Prebbets Thanks my friend.. I appreciate that.

[@davidblain2714]

Im a drag racing guy and wanted to say: Damn buddy your videos are excellent to watch..very informative! Thank you!

[@JAMSIONLINE]

Appreciate it! Glad you enjoyed 😁

[@TheCuriousOrbs]

Really like the hi-res camerawork in your uploads. Especially on the close-up shots. These type of videos look amazing in 4k

[@jsimsgt96]

Of all the people to grow up on the prairie, I think you are one of the luckiest ones. Outside looking in, you have a great dad who built a solid business. Credit to you for appreciating it and taking advantage of your situation! I live in cos and next time I need machine work I will be making the drive!

[@qanon_qanon]

I have installed these 3 cylinder Yanmar diesels in new off road vehicles and they start really easily, I can only say that to warp the block and head that bad was a loss of coolant unoticed, maybe the customer should have a temp alarm as it's cheaper than a rebuild...

[@richardwolske2015]

Your narrative during the work on the engines in the videos are priceless, I’ve been a jet mechanic trucks , dozers, and outboards mechanic for many years. I’m totally impressed ! ❤️👍

[@chrisjones2224]

Great job, not only with the machining but the description, and not forgetting the right way to do the job, re cut check, cut, check etc

[@65BAJA]

More crank grinding please. Always enjoy watching the "employee" run that machine.

[@wickedcabinboy]

Compliments from a non mechanic like me are undoubtedly unimpressive to a professional but I thoroughly enjoy your videos and will continue watching.

[@Halfrightfox]

I can't stop binging these videos. They're so satisfying

[@JohnSmith-yv6eq]

Donj't just bing them...bingeing them is so much better...

[@gregoryschmitz2131]

A bit over 3 years ago I quit work, more repair than overhaul though I did some of that 20 years ago. I love this stuff still. Its always amazing to see true craftsmen (or women) do this. I appreciate the do what is needed as cost is a factor in many repairs and getting 85% does the job and is practical and I always practice Reality Based Maint!

[@Larsgman]

I don’t know much about engines but from the videos I’ve watched about engines and valves my wife could not believe me when i told her about the tight tolerances on valves and pistons. There is something interesting about the precision that goes into engines and this video beautifully demonstrates it. Thank you.

[@Absaalookemensch]

I love your videos. You and your parts washer do an excellent job. You're fortunate to have a great dad to learn the business from. And he's fortunate to have a wonderful son.

[@chrissmith2744]

Love the content. I work in a hyundai engine plant as maintenance. We machine 1200 rough casted cranks, blocks, and heads. To fully assembles running engines in 24hr. Its a lot of automation, but it's amazing how true your work is by self setups. I watch the gauges. Amazing work

[@bradhaines3142]

the plant that had the recall from sloppy manufacturing?

[@chrissmith2744]

@Brad Haines I can't discuss that recall. I know more than I'm supposed to. but I can say our tolerances are tighter than the big 3.

[@Ultimatora]

@@chrissmith2744 Fingers crossed as I got a remanufactured engine from that. Good to know that workers have faith in their work though.

[@guysview]

These videos are intoxicating to me. Thank you.

[@jeremykamel9655]

Nice work! Those Yanmar engines are excellent. I’ve worked on hundreds of them in marine transport generators. I’ve seen them last 30,000 hours with oil changes every 250 hours.

[@Midnight_Rider96]

Looks like a good motor, I just don't like the open deck design. Not much support for the cylinders. I'll take a perkins instead

[@dukecraig2402]

Where are they made? Never heard of them before.

[@jeremykamel9655]

@@Midnight_Rider96 the newer ones aren’t open deck.

[@jeremykamel9655]

@@dukecraig2402 Japan.

[@dukecraig2402]

@@jeremykamel9655 Remember back in the day when stuff from Japan was junk? Now it's the good stuff and all the junk comes from China.

[@caveone-365]

Nice job! You found his head gasket failure reasoning pretty quick. Looks beautiful. Thanks for sharing! 👍

[@fjb4750]

Fascinating. Even as a 30+ year tech/shop owner. Love watching these videos 🙏🏻🇺🇸🙏🏻🇺🇸🙏🏻🇺🇸🙏🏻

[@Big.Ron1]

Very nice. It is a good thing to see how you work. Take as little as possible and not replace serviceable parts. If you were close you would get my 2000 Jeep 4.0 when I tear it down. Thank you.

[@andrewa4352]

I love the process, but the explanation was the best part. Very well done sir.

[@JohnSmith-yv6eq]

Phil 650 4 months ago I used to work for a thermoking dealer. We had a lot of problems with these motors over heating and blowing head gaskets.Thermoking took yanmar to court but lost.They tried an updated head gasket and torque setting and some times this worked, however if the problem reoccurred a second time they replaced the motor. eventually they found that the water pump was the problem,it was causing hot spots at the back of the head. An updated water pump cured the problem.Side note, the engineer who sorted this problem had the same problem in boat engines in his previous job. Hope this is of help.

[@wilsonrawlin8547]

Another good one and great breakdown on the issues and solutions. Way too much clearance to stop blowing HGs without resurfacing both like you did. Completely agree on the valve seats. They'll last more than past another rebuild if it ever needs it.

[@joannaatkins822]

Another interesting and satisfying video! You do a great job explaining and shooting your work, I daresay you'd make a fantastic teacher. Thank you for sharing your work, we appreciate it

[@JasonSmith-vd1sz]

I agree he is a fantastic teacher! He is teaching the world via KZbin. Now get your pencil out, pop quiz. 😊

[@Yawles]

I'm retired as a farmer/truck driver. This type of workmanship has always fascinated me. I wish my hands and fingers had the same level of skills that my mind believes i have! I enjoy each of your videos.

[@Chaos4Eva1]

Great video! I'm not a mechanic or racer but always heard the terms and explanations. It's great to see a video to actually see the process!

[@chrisomalley50]

Great video. I was especially impressed by the 'softly, softly' approach to skimming the block. Whilst you touch on the subject of replacement versus renovation cost I would love to have some idea of job prices.

[@mikemilburn7823]

It's too bad that the majority of your work is not seen other than in videos, awesome work. The videography and voice over is great...Mike

[@amcargltd9784]

I agree. I'd like to see more. If you visit the website you can see some of the items they offer. I would imagine, based upon their selection in their store, they do a lot of engine teardowns and scrapping.

[@eugenewillenborg5058]

@@amcargltd9784 00

[@libertyforamericanow]

Like the video. Also liked that it didnt drag on for 20 minutes

[@christophermarshall5765]

Nice job. Too many people who fix cars have no idea how much work is required to operate the boring machines.

[@terrytytula]

One of the things I've noticed over decades and hundreds of engines. Is that some engines are more sensitive for the need for retorquing, after the installation of a new head gasket. Some engines you can get away with not retorquing. Others if you don't it's just a matter of time before they fail.

[@nathanahrens4280]

Man I thought this was going to be an update on the model a... but I still enjoyed it. Thanks

[@phil6506]

I used to work for a thermoking dealer. We had a lot of problems with these motors over heating and blowing head gaskets.Thermoking took yanmar to court but lost.They tried an updated head gasket and torque setting and some times this worked, however if the problem reoccurred a second time they replaced the motor. eventually they found that the water pump was the problem,it was causing hot spots at the back of the head. An updated water pump cured the problem.Side note, the engineer who sorted this problem had the same problem in boat engines in his previous job. Hope this is of help.

[@mro4440]

What year did Yanmar upgrade the water pump? I have one of these engines in a 2011 John Deere.

[@phil6506]

@@mro4440 I no longer work for the dealership but it was a few years back now. You should talk to the spares manager at a TK dealers, they should be able to help.The problem was always at the flywheel end of the head caused by hot spots , these motors ran at two speeds only high and low in this application [thermoking unit]

[@mro4440]

@@phil6506 Thanks Phil. I considered your point that the application the engine was operating in was contributing to the problem. Probably 🤞not an issue for the most part with an ag tractor.

[@stuarth43]

gee as an apprentice I, in the 60,s did all that by hand except planing, honed with a drill, triggering the drill to spin slow, cutting the seats by hand reamers, and grinding with a suction cup and paste, good vid nice tools you have

[@Joeschmo63]

You’re shop is awesome!!👍👍

[@blakeengland7784]

I used a portable Sunnen hone, which you adjust at the stone holder and run in a SnapOn drill. I do aircraft jacks strapped to a table with a 1" DeWalt drill on a custom plate. I measure my barrel and then put vice grips for my start and stop and use a piece of hard 12mm plastic and bend it into my I-beam and cut new pistons on my Monarch lathe. I hate doing everything by hand, but it's always worked for me for aircraft tolerances! 👍

[@ianduijsens]

It funny to see these old yanmar engines as i currently work at yanmar so i see the new engines every single day

[@amcargltd9784]

Man this is so cool. I'd love to know more about these machines and what it takes to do this for a living.

[@mr2_mike]

Same minus the doing it for a living part.

[@garymallard4699]

Showing up on Time and everyday your supposed to work..and getting dirty and tired doing Man's Work is how you do it for a Living .. the machines are normal Machine Shop equipment that you apprentice or go to Trade School to use... this kind of work was normal decades ago when engines got rebuilt not " replaced " ...how old are you?

[@amcargltd9784]

@@garymallard4699 32 but I've never worked in a machine shop before. I'm a draftsman but I still like to learn about other trades.

[@jasonligo895]

Truly fascinating. I always wondered how the piece to be machined is fixtured accurately

[@brucewayne9300]

i wish you made longer videos they are very well done just wish you showed more machining and building.. your dad built a very nice business and its nice to see you learning and taking it up. oh sorry not your dad your parts washer!!!! LOL

[@twisted5576]

Gorgeous work

[@WorkshopRebuild]

Great work man! I‘m just working on a Yanmar 3TNV82 and the engine needs a rebuild too. Unfortunately many operators don‘t clean out their radiators and these engines fail fairly quickly. Hopefully that engine will be up and running in no time! Keep it up😎👍🏽

[@henkmeiring01]

Never seen such a thorough job on such a relative small engine.Usually patched up with silicon,thicker oils,etc .Must really be proud of yourself and your work. Now for the thing,if i may ask: What is total cost?Engineering works,parts,labour.....?

[@zas5892]

That was awesome bro I loved watching every bit of that and that's a nice little three cylinder engine

[@artlife6210]

so satisfying, and nice to know the owner will get a reprieve from endless r and r's

[@2manycatsforadime]

Paint bothe metal surfaces with rust oleum silver paint. Let it dry. Do the same with the copper meatl gasket and once dry assemply and correctly torque. This is what they do to fuel dargsters. I do it will leaking high pressure boiler washout plugs. Once installed they never leak.

[@tomivy1052]

block/etc all looks good real proffessional work!!!

[@JAMSIONLINE]

Thank you! 😁

[@craigkeller]

Good calls and great work.

[@implct2635]

3:02 I agree to this. It's harder than boring liners. It has multiple flaws, sometimes finishing stones are breaking, sometimes it's tight on the top but already loose on the middle.

[@jeffo881]

I really like the use of the Dykem Blue, for you not necessary, but for the viewing audience its fantastic.

[@bradhaines3142]

its not as great as you'd think, you have to put a lot on or it'll rust under it

[@jeffo881]

@@bradhaines3142 ummmmmmmm ok.

[@Kevscancave]

Outstanding! Enjoy your approach to find a solution👍Wow! 😎

[@jtlearn1]

Excellent as usual...! Makes me want to join you!

[@michaeldunagan8268]

Very Interesting. Very informative. Especially the "not replacing everything despite rebuilding most of the engine". I nuked the entire suspension and steering save the rack on a Toyota bought. In hindsight, the ball joints were still okay despite 145,568 miles on the clock. But the cost was about $24.00 each aftermarket circa 2018.

[@clanceywyman4951]

You are very informative and very enthusiastic thank you for the video

[@miceinoz1181]

Ah, another fix of JAMSI, brilliant!

[@deansapp4635]

Excellent video, short and to the point.

[@mrizkic]

Thats one beauty engine now dude. I love it

[@oby-1607]

In the good 'ol days of Nascar, they would obtain a well used truck engine that had been well seasoned from the countless heat/cool cycles. The warped block would then be machined to a concentric tolerance for flatness where gaskets met and the crankshaft bores checked for uniformity. Surprised that the crank bore trueness wasn't mentioned here. This warpage of the block and head is described as core shift and is very common. Almost everything fuel driven is this way to some extent.

[@jasonlgreener]

Great videos! Would it be possible to do some videos of setting up the equipment? How do you make sure everything is mounted flat, the cylinder honing machine is center in the cylinder, etc I know you measure everything but I'd love to see it.

[@Troy_Built]

That coolant jacket looks like the Ecoboost Ford engine that has head gasket problems.

[@johnpatty7489]

Love the work been around machine shops for years Steve Ashworth

[@gafrers]

Quality work as always

[@Potatogambit]

Love the channel, just wished I was closer to have you guys do my machine work.

[@James-po5ed]

As a carpenter I found this very interesting, thanks.

[@fbksfrank4]

Talking to my buddy who was pulling a head on a three cylinder air cooled drill motor, sitting on top of one of the pistons was the backbone of a single edge razor! Blade was ash.

[@richardmessenger9474]

Great video... fantastic information given to machine the block/head...👍👍

[@cfa61]

Want a set of Starret metric torque-release vernier calipers in METRIC? Only used lightly, original case etc? Think of all the conversions you'd save! Thanks for the good work and nice editing.

[@JasonSmith-vd1sz]

I absolutely love these videos. Keep up the good work.

[@wallacegrommet9343]

I have a three cylinder marine Yanmar. 27 years old, 4,000 hours, no problems. Didn’t realize it is an open deck design

[@james10739]

That machine is going to run better than it ever has

[@puerco911]

awesome work!!! you guys should go metric man, makes life so much easier

[@golf-n-guns]

Better than new.

[@Rectifjuillet1234]

Un très beau exemple

[@supertruckertom]

My oh my at that crank. Another enjoyable video... I bet your machine work is better than factory original.

[@TEWinkes]

Great video as always!

[@popswrench2]

one more thing ; with about .011" removed total , INJECTORS may nee shimming if direct injection . if indirectpower , precup , extra compression will be nice

[@GrownByMe]

so awesome. This kind of stuff interests me so much

[@havocsquad1]

I'm curious why the amount of warpage of the head and block wasn't checked before replacing the head gasket on the first time? That's part of basic diagnosing 101 after a potential overheat/head gasket failure issue.

[@808redneckify]

You guys ever do timesert installs? That would would be an interesting video. Comparing that to helicoil and when to use it.

[@epiphonefish]

Projectfarm took care of that already

[@808redneckify]

@@epiphonefish link?

[@JamesColeman1]

Thanks from all us couch captains

[@jw4620]

Nice work!

[@fitter70]

That was an excellent video as usual. Very informative.

[@CraigLYoung]

Thanks for sharing 👍

[@JAMSIONLINE]

Thanks for watching! 😊

[@apollorobb]

Looks like a 3 Series Deere Engine . Nice job sir

[@Horus9339]

I had to take my car in to be repaired years back as it was not running correctly. I left it with the mechanic and went off to do some chores. It must have been about two hours later I returned and was told that I had blown a seal. I was furious and told the mechanic that I would never have done such a thing to a poor defenceless animal. I'll get my coat.

[@Nordern]

Do you do anything to compensate for the material taken off the top? like thicker gaskets? or is it so small it's not a problem?

[@momfiethehunter504]

I did not expect you here, guess you probably get the same youtube shorts as i do lol

[@JAMSIONLINE]

In this case it’s a small enough difference that it is not an issue. Had it been an issue, options included a thicker head gasket, a “head saver” shim, or fly cutting the top of the pistons.

[@momfiethehunter504]

@@JAMSIONLINEvery interesting. Didn't know there would be other options like the head saver

[@Nordern]

@@JAMSIONLINE Thank you!

[@JAMSIONLINE]

Not available on every engine. Mostly aww it on OHC applications. It’s kind of a bandaid….

[@slvrwrx25]

Good video dude

[@Joseph-Colin-EXP]

Well done

[@robertoescobar007]

Wow great video and explanation Sir. 👍👍👍

[@dieseldork6]

Awesome work guys!

[@jakezgab8576]

Very impressive

[@elrobo3568]

Great work! the Yanmar now have 12 to 1 compression and put out 250 HP! chuckle

[@James-xd7nq]

My dad used to own a machine shop and he would teach me how to bore and hone. It’s a good business trade he would charge between $40-$100 per cylinder.

[@DriftmanX]

Thousandths of an inch…… sheesh… I’ll never low ball/bargain a engine rebuild shop again

[@mdbrenna]

So talented!!

[@patrickwendling6759]

Thank you for your knowledge and video's USA 🇺🇸

[@221sk8er]

out of curiosity. When machining the head, why do you surface before you work on the valve seats? I remember in your model A video you were talking about the valve seat machine using the the valve guide as a reference, or do you tram in the deck on the machine first? Because if you surfaced the valve seats first all to consistent depth, then you could deck the head to ideal valve recession clearances. Or is my thinking completely wrong? Thanks for the videos, really interesting stuff.

[@drewtramp1577]

good stuff.

[@gvet47]

I am surprised at the limited surface area to seal around the cylinders to begin with. What type a gasket is actually used? I do not know much about cost now days but the new pistons and machine work looks like it would be close to a new short block if available.🤔

[@Failure_Is_An_Option]

MLS is the only head gasket I've seen since the late 80's. Considering Japan invented MLS gaskets, and Yanmar is Japanese I'm going with MLS. Surface area does not make a seal. Gasket have a fire ring that is not very wide at all.

[@bmwe-op4jx]

Amazing results and knowledge May i ask what brand are the new valves? Also did you ever use Amc brand valves? Amc is a spanish company which sells heads ,valves etc