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]

>

[@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

[@65BAJA]

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

[@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.

[@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!

[@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 ! ❤️👍

[@fjb4750]

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

[@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...

[@guysview]

These videos are intoxicating to me. Thank you.

[@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.

[@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...

[@christophermarshall5765]

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

[@andrewa4352]

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

[@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.

[@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

[@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.

[@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! 👍

[@artlife6210]

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

[@libertyforamericanow]

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

[@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.

[@normandfogarty3505]

You’re shop is awesome!!👍👍

[@jasonligo895]

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

[@ianduijsens]

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

[@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.

[@deansapp4635]

Excellent video, short and to the point.

[@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

[@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.

[@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.

[@james10739]

That machine is going to run better than it ever has

[@jtlearn1]

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

[@popswrench2]

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

[@zas5892]

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

[@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.

[@Iceberg86300]

Since you're honing I highly suggest you and your viewers check out stapleton42's video about Greg Anderson honing cylinders on one of Lake Speed's old NASCAR engine. The machine is incredible. Actually, the entire Lake Speed series is absolutely awesome if you're into cars, engineering, and machining. They're rebuilding an old engine trying to make as much power as possible using modern manufacturing tech, materials, and engineering. So far, visits to Greg Anderson's shop, comp cams, Holly carbs, and Carrillo piston & rod factory so for as well as well. The entire channel is awesome as well, as they visit a bunch of old race shops & anything with Lake Speed Jr in it is a joy to watch. He really loves what he does. I'll add a link or at least description to make it easy to find. I'll try a link first & if my post is auto deleted, just a description. Edit: auto delete is on for links so search "stapleton42 Lake Speed's ford c3" for the first video with dyno & teardown of the engine. But there's also a video before that with the visit/interview at the race shop.

[@richardmessenger9474]

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

[@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😎👍🏽

[@CraigLYoung]

Thanks for sharing 👍

[@JAMSIONLINE]

Thanks for watching! 😊

[@James-po5ed]

As a carpenter I found this very interesting, thanks.

[@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.

[@gafrers]

Quality work as always

[@Rectifjuillet1234]

Un très beau exemple

[@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.

[@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.

[@golf-n-guns]

Better than new.

[@Joseph-Colin-EXP]

Well done

[@notyou6950]

This looks easy while sitting in a comfortable chair on my lunch break in a engine machine shop…

[@patrickwendling6759]

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

[@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?

[@ExperimentalMNgrower]

so awesome. This kind of stuff interests me so much

[@ProximoNovio]

I need to see this engine running.

[@apollorobb]

Looks like a 3 Series Deere Engine . Nice job sir

[@kstricl]

Well! Sure obvious how bad everything was after the first and second passes.

[@CharlesVanNoland]

While it's most likely that the block being slightly warped that caused the gasket blowouts, was the cylinder head checked for flatness too? EDIT: Nevermind, made it to the part about the head :D

[@JasonSmith-vd1sz]

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

[@elrobo3568]

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

[@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

[@BL-tr2ug]

Very bloody cool.

[@fitter70]

That was an excellent video as usual. Very informative.

[@dieseldork6]

Awesome work guys!

[@DriftmanX]

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

[@HillDogTV]

very cool

[@joeleefinn8091]

Awesome video great job

[@slvrwrx25]

Good video dude

[@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.

[@JimmyDean404]

With all the material removed, did you need to modify anything else other than oversized pistons? When do you have to worry about valve clearance?

[@snowgorilla9789]

And that should be as good as new or maybe better

[@rogergreenwood3409]

good job

[@scotteric8711]

Thank you for showing this. Yanmar are the core suppliers of all the engines for low-priced tractors and farm/induatrial equipment. Whether or not this defect is a single event, or affects a series of runs will be a question. But its good to put it out so prospective buyers and maintainers have a clue that they may dismiss because the equipment is "new."

[@jihomet7607]

I know as far as sail boats engines go I have to say I never hesitate in relying on them and parts are available anywhere in the world...

[@Failure_Is_An_Option]

You try to speak as if you have some knowledge of the subject... yet you don't. Sit down junior.

[@JohnSmith-yv6eq]

There was just the problem of the twisting induced in the head and block by the overheat... at least one overheat when the headgasket blew the first time... and possibly another overheat and twisting and warping of the block and head when the second headgasket blew.... So machining didn't really have any influence.. as from the factory it would have been flat and square and it worked for years before the overheat (s)......

[@SailingMomentum]

Be sure to let us know your location. Solid work.

[@tracycrispino3446]

As always, well done ✔️ 👍

[@rnvrnv354]

Great job men! Now what about the head?

[@grumpyg9350]

Nice video.👍👍👏🏻👏🏻

[@andrewziegler2608]

Machining the head and block over 10 thow. Doesn’t that affect the timing a lil? I guess you could just get a thicker head gasket or adjustable cam gear

[@alexclarke373]

I worked at a yanmar dealer when I did my apprenticeship. And this is exactly what I expect from a yanmar 🤣

[@michaelmcclure8673]

How much did you remove total deck and head surface?

[@josephpuchel6497]

Hey Just subscribed excellent video

[@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.

[@stevenm3141]

From what it was, looks like someone isn't letting the engine fully warm up. Everything is warped.

[@Ausblack]

I'm looking forward to the Jaaaaaaaaaaaaaaaaaaaaaaaaaag.

[@jasonwarren213]

Is there a chance you could do a video on the parts wasure our shop just recently bought one and if there's anything newbies could know be great

[@VR6NAVYVW]

.25" oversize! Damn that's huge

[@JohnSmith-yv6eq]

.25mm.... .25 millimetres. = 0.00984252 inch = 9/1000 inch The Yanmar is metric OEM......

[@VR6NAVYVW]

@@JohnSmith-yv6eq oh lol. That makes more sense.

[@JayRey117]

Can confirm it is definitely a Miata

[@drubradley8821]

I sure do enjoy your videos, great lighting, great camera angles etc... But I was wondering, not so much on this block, but an example of a engine like a Ford 2.3 ltr, with an over head cam. Same deal over heated, and warped, if that is a thing on those? When milling/fly cutting both the mating head surfaces, mainly the head itself, is it a good idea to install the cam, of maybe that is a bad idea beings the bearings areas are part of the casting... Maybe a Honda or Toyota head that has cam cap bearing retaining system? But to install that system then mount the head to the table for the clean-up procedure? Or does it not matter, and tension that might be from the cam and bearing caps is so little, it wouldn't even hardly measure a difference with or with out, that once you unbolt the head from the table nothing would change in the relaxed head tension or stresses in the casting? Just curious is all. Neat videos though.

[@banalMinuta]

Thanks for the detailed explanation!

[@adrianlindsay3194]

Does working in metric hold any appeal?

[@orangetruckman]

Good stuff!

[@garyr7027]

Smart to only take off what's really needed. Had a machine shop tell me once he was gonna take off 10,000's off a set of heads for my engine and that was on the phone, heck I didn't even take the heads to him yet... wth? Why would a shop take that much off before they even knew what it needed? Never take off more than necessary, especially on interference engines and with MLS gaskets, as the block more likely will also need shaved down some for a good seal.

[@williamfranklin6283]

I had an OHC Isuzu, broke a timing belt, bent a few valves etc. The machine shop decked the head so much the timing belt was off by 1/2 tooth. The distributor was run off the cam so either retard the cam / full advance dist = no power or advance the cam, retard the distributor and it would spark knock.

[@garyr7027]

@@williamfranklin6283 sorry to hear that, some places shouldn't even be in the business. Decking heads isn't something that's haphazard, many things to consider before making those cuts, once cut they sure can't be uncut. It's just ain't right to screw up people's stuff.

[@williamfranklin6283]

@@garyr7027 I wouldn't have thought about it until it happened to me. I did put 200k miles on it with 93 octane to help the ping.

[@garyr7027]

@@williamfranklin6283 it's getting bad at some shops, I honestly believe some make problems hoping they'll get return business. I've encountered places like this when they think they call pull one over on someone. It's why I do my own work, exception for a few things I don't have tools for, and even that isn't much. They're scam artists and dealers are the worst, whom I stay far away from. They either know how to screw up, or they just don't know they did, but either way they cost more than they're worth.

[@cameron878]

I had to google .25 mm to in conversion. Basically .010 over?

[@cameron878]

I paused it at 2:00 and you answered my question at 2:06. Lol

[@cameron878]

Crap I'm on my living room couch (it doesn't look simple though), are you reading my mail or something dude?

[@lwilton]

Just remember 1mm is about 40 thou and you can work from there. (It's actually 0.3937 and change, but that is pretty darn close to 0.040.)

[@lwilton]

I noticed those pistons come up real close to the top of the head. Do you ever have problems when after decking a head the pistons come up too high? If so, what do you do about it?

[@CaptainCandycorn]

In my experience if a head/blocked is decked and the compression ratio is too high or the pistons make contact, a thicker head gasket is required.

[@KimballPrecision]

@@CaptainCandycorn to add to this, I believe they also make shims for this purpose, to adjust compression or to add clearance for the pistons/valves.

[@bigears4014]

On some engines they deck the pistons

[@peterjurczyk61]

Damn Jimmy seems you know what your doing..your such a disappointmengbtonghe family...hahahah..have a super day..awesome !

[@alexmaccity]

Isn't that for a samurai?!?!

[@rcpilot82]

Are you able to share where you sourced your parts? I have a 2 cylinder yanmar and have to rebuild the head and cam bearings soon.

[@JohnSmith-yv6eq]

Do your google research. If it is a marine engine a local port engineering shop may be your best bet.... or if it is in an industrial setting...an engineering workshop....

[@kiltedsaint]

Do you happen to know what the final ptv clearance? Any chance of contact?

[@markchapman2585]

Great job. This video went by really quick thanks for the great content cheers from Canada 🍻

[@greglaroche1753]

After removing material from the deck and head, can you use a normal head gasket or is a slightly thicker one available? Thanks!

[@JohnSmith-yv6eq]

There may be but in this case it is not a problem...

[@ron8935]

Not actually the last time that the block was decked the original first time that the block was decked it was done wrong.

[@JohnSmith-yv6eq]

What about the twist and warpage that was induced in both the deck and the head by the overheat???? That have anything to do with it????

[@JohnDoe-ml8ru]

It's a mostly open deck, it's going to blow head gaskets.

[@gorak9000]

If you deck the surface of the block don't you also have to take the same amount off of the pistons? Don't the pistons usually come up flush with the block surface at TDC?

[@wreckandraceify]

Head gaskets.