Fixing The Head From An Arrow C-96 Oil Field Pumpjack Engine!

[@JAMSIONLINE]

Get 50% off your first order of Sundays: www.sundaysfordogs.com/JIMSAUTO or use code JIMSAUTO at checkout.

[@kricketscreations4887]

That lifting ring that you guys use you guys make that or did you get it somewhere

[@thorloki5449]

Hey it looks like there is a crack up at the sparkplug plug hole

[@JAMSIONLINE]

@@kricketscreations4887 We made that. It is a section of heavy wall pipe with 5/16", 3/8", 7/16", and 1/2" bolts added for lifting. We also have some with metric bolts for use on metric castings. Probably not OSHA approved but with a little common sense it works great for us.

[@jeremybrown7475]

No trying to tell you what to do but i would grind the mushroomed part off your install tools i just had a peace of chisel go through my leg 2 days ago not fun stay safe keep up the good work

[@danbrit9848]

take the old valves and put them in the lathe drill a hole down the center ,,,glue a pen refill in it ...have the coolest shop pen

[@codegame027]

I suspect the quality and precision of your work on an engine like this is substantially higher than is typically seen or expected on these engines.

[@neithertwosturrr3016]

Most of these engines were meant to be maintained and worked on in the field. The reason this thing is probably so beat up is because there was bandaid after bandaid and not only that but alot of the build up from contaminants actually helps seal alot of the surfaces..... until it doesn't anymore than you get what you get in this video.

[@astron1701]

You would be right. It's a dying art in the Illinois basin. I'm have to use every trick in the book to keep them running and resort to tailgate machining due to the closest shop being 2 hours away.

[@bjrnhjjakobsen2174]

It’s up to 19.3 horsepower now😂

[@neithertwosturrr3016]

@@astron1701 Yessirrrr. Some people don't have any idea what brush mechanics or field mechanics have to go through.

[@astron1701]

@neithertwosturrr3016 and the quality (or lack thereof) is an absolute joke. When I was growing up in the 80s and 90s we might have to do a teardown once every couple years. In th 00s it became every 6 months, now if you can get 3 months you'll be luck (on fairbanks/bell 118 and 208 models). Valves and seats wear out alot faster and when you exchange heads or pistons what your given is a joke. I have to use parts now that I would have junked 15 years ago. Continental/arrow motors are fine but I just prefer what I grew up working on. Though being able to field strip and resleave a c-46 and up in the field is nice. I don't have any of those right now to do a video on but I might get a few 10 year old c-66s soon so I'll need to brush up on them lol.

[@johnalexander4356]

We ran those on my grandpa's ranch. Also ran on the pump gas. It was the most reliable engine I ever saw. We checked it daily and did an annual rebuild, which was usually just an internal inspection and valve job. We also used the pump gas to run a Chrysler 413 ci irrigation pump engine. Both of those engines were really clean when we opened them up. I'm guessing that engine was burning as much oil as natural gas!

[@JohnSmith-pl2bk]

Different wells have different purities of gas.....some are very oil vapour laden....some are very "dry"....

[@myfastcars]

AWWWW,, We really really need to know how it worked when it was reassembled and put back in service.. PLEASE do an UP-DATE to this video so we can hear how it turned out. I have ZERO doubts it was one of the best head overhauls they have ever seen but, knowing how it performed will be outstanding. Thank you for all you do.

[@andrealt9261]

Yes. Please do a follow up Video. Id like to see and know about the outcome and how the engine sounds like compared to another❤

[@LNC4P]

When it comes to the vacuum testing, this shop is located in eastern Colorado where the elevation is about 4,000ft above sea level. The vacuum gauge will read about .9 bar at maximum vacuum because of the elevation. So, for the pressure of the seat to read .8 is relatively high because of the elevation. If this test were to take place near the coast, im sure it would read between .85 and .9 bar. This shop did a superb job with this valve seat project! Thank you for the vid!

[@celtics9348]

That is high level craft on a junk head. I bet when it was new it wasn't close to that precision. Both you guys are awesome, this is what skill and integrity looks like.

[@ronwilken5219]

😮Where I live and worked I passed a few of those every day. The hit and miss ones especially sounded crazy. I always thought their tune was "pump money, chuff, chuff, chuff, pump money, chuff, chuff ,chuff" etc. You mentioned no upper cylinder lube in the natural gas, but the ones here have a separation tank that collects the oil vapour off the ng before its piped off site. The oil is collected every couple of weeks by tanker truck. The gas burned is raw and contains the oil vapour, which provides the necessary upper cylinder lube. At the Union Gas head office, they have a humongous twelve cylinder standby generator that runs on "cleaned" NG so there's no lube quality. In order to overcome that, a small quantity of diesel fuel is injected to provide top end lube, but the principle fuel is still the NG. Thanks for a slightly different take on your work.

[@JohnSmith-pl2bk]

the 750hp diesel engines that have run our sewage works for the last 60 years run10% diesel and 90% methane off the bio digesters. They also tried compressing the gas and using it in their truck fleet for a while...

[@golfbravowhiskey8669]

With me being in the oilfield for over 30 years here in Texas I have rebuilt a lot of those, and I can tell by looking at that engine whoever the pumper was on that well did not use a drip pot That's why it is eat up with carbon, we run about 30 Arrow and AJAX engines along with 15 or 20 Ford 300 6cylinders and I can tell you when you pop the head off after running about 10 to 20,000 hours nonstop burning casing head gas they are just as clean internally as something with a few thousand hours Just for comparison 24 hours a day seven days a week if you just averaged that out on a Ford 300 averaging 50 miles an hour equals about 390,000 miles per year. And those things run flawlessly for at least two or three years Throw a low compression rebuild kit on it and a new ignition get the head reworked and it's good for another two or three years sitting in one spot. Another problem with the carbon in that engine is they run extremely cool even in the summer heat, if we notice we're getting a lot of backfiring on the downstroke we have a valve going into the intake or we can shoot a couple of shots of brake cleaner or Varsol directly in the engine while it's running and let it get good and hot and that carbon will start blowing out the exhaust looks like sparklers 🤣

[@Charlie-h7x]

I used marvel mystery oil for carbon, Ajax engine where the worst for carbon buildup in my experience

[@crazyoilfieldmechanic3195]

Drip pot ain't near enough around here. You have to have a dedicated scrub pot full of steel wool or washed lathe turnings. To get all the solids out of the gas. When the gas stops flowing well enough take out the wool and replace it. A good sized pot will last a couple of months or so.

[@michaelbailey7483]

Was beginning to worry about you guys no video in three weeks dam glad to see my favorite channel back at it again

[@landonjoseph8786]

Same, needed my fix lol

[@robertwest3093]

This channel is the best when it comes to the different types of vintage engines! I love seeing these oddities. I still remember the first time I saw a gas engine powered washing machine 👍🏻👍🏻

[@kennethpalmer1909]

I rebuilt a Fairbanks 208 for a customer that ran the engine non stop for a year on a pumping unit. He would slow the engine and drain the oil out then refill it once a month without stopping it. Finally had to stop the engine because the down hole pump in the well needed pulled out for repair.

[@astron1701]

I about had a heart attack when you said he slowed it down and changed oil running .. my great grandad and dad taught me how to work on them as a kid and I've probably done 200 rebuilds and thousands of oil changes in the last 30 years, never ever heard of anyone doing that.

[@Charlie-h7x]

I had many of those, good little engines. They where Continental C 96, C 66 and C 106 are the ones I’ve seen and later on I believe they where Arrow. My brother was a mechanic that worked on them. They have sleeved cylinder that could be changed. Ran on wellhead gas or propane.

[@calebbell5018]

Another good time with Dad in the shop. Thanks fellas!

[@Hopalong..75]

My uncle was an oilfield pumper in Sou Illinois, he visited each of the wells almost daily, if an engine failed he would rebuild it in the field, rain, shine, hot, or cold in good heath or bad, drunk or sober. A pumper works 365 days a year makibg sure the wells are producing, and calling for transport when the tanks are full.

[@jasonburguess]

Just wanted to say, a lot of these small cracks in cast iron can be welded with nickel99 welding rod, the part needs to be preheated prior to welding and then cooled very slowly, but if done correctly these repairs can last longer than the lifetime of the part and can be machined after welding and cooling. Could be the repair that saves a one of a kind part or hard to obtain replacement. I've done this with old tractors (1930s-1960s) with total success, not one has failed after years of tough hard use. Love the videos keep up the good work!

[@Texas40years]

I follow the Cutting Edge Engineering channel and a few months back he tried to repair a cast iron part. As you said, it needs to be preheated first. Unfortunately it he let the part just air cool which let it cool down too fast and ended up with re-cracked part.

[@ethrwilj]

The fairbanks morse 208 used one lifter to open the exhaust valve and the intake valve was opened by vacuum, but that did not make it a hit or miss engine as its rpm is regulated by air fuel supply. A hit or miss engine uses compression or spark interuption either by holding a valve open or holding the points open via a governor to prevent the engine from firing once it reaches a set rpm.

[@jeremiahchamberlin4499]

Thank you for the clarification, I was puzzled by the comment, since I know how hit-and-miss engines work, at least the ignition controlled ones.

[@MikeHarris1984]

I imagine the exaughst spring collapsed from no maintenance and exaghs gas leaking Glad to see premier back on sunday morings!!!

[@Mangsaab1954]

24:50 That felt pretty good going in. I love that sometimes risqué banter. Keep it up.

[@brian4958]

I pumped wells for 8-9 years some off grid run natural gas generators to power an electric drive instead of a gas engine I’ve seen them at over 80,000 hours with no overhaul. Just routine maintenance. Had a few of these arrows and AJAX too. Probably from the 70’s still running in early 2020s.

[@davidclark8085]

I worked on pump jack heads three or four times a year, at the machine shop I worked at in North Texas. Mostly all the same equipment, but I had a Van Norman surfacer, and a TS 2000 head/ seat , and guide machine. Good times!!!!

[@ianbates1312]

I’m a retired engineer,,,, and what I miss the most is the same satirical machine shop humour that you are so good at!! 😂😂

[@1978garfield]

43:14 Looking at the drift or whatever it is called you are using to pound in the seats reminded me of the sad case of Glen Greenwood in Shake Hands With Danger, the epic Caterpillar safety film. If you have never seen it watch Shake Hands With Danger it is on youtube. Great video, I am sure that head is in better shape than when it left the factory. I love the self powered off grid oil wells. Even an EMP wont stop them. I had no idea automotive machine shops still existed. A decade or 2 back I tried to find someone who could rebuild a Cadillac 472 engine and I gave up. If I found someone now who knew how to do it, was still doing it, I couldn't afford it. Glad you are still around, still machining and still doing it right!

[@jimmotormedic]

Absolutely enjoy these videos. Being a mechanic that works on a lot of stuff no one likes to do any more I can appreciate your skills. I've always wanted to get into machine work and learn more about it but never had an opportunity. No real good options for machine work in my area anymore. Keep em running, great stuff!

[@mitchellry99]

Work on these engines weekly in Alberta Canada, so damn tough. Do anything to keep em running. Pistons liners in the field. Rerun them just to change the liner oring lots, they are bulletproof, and best starting in -40

[@mitchellry99]

To note with all these cracks, these engines hold about 20l of coolant with no circulation. The boils, and condenses in the condenser and cools that way. Run very hot and very common for the level shut down to plug from dirty coolant and overheat. And they will run until they seize

[@JohnSmith-pl2bk]

@@mitchellry99 Seems a no brainer to drill a port right into the water jacket on the head... and tap off at least a 1 inch pipe to a 55 gallon drum of coolant with the "cool" coolant from the bottom of the drum circulating to the bottom of the head?

[@mitchellry99]

@@JohnSmith-pl2bk they run hot just how they are, can't be too cold in the winter, lots add a pump and hose to the well head to heat fuel gas pipes and what not

[@JG-iq2qv]

The valve spring collapse has happed to me on overheated zero turn mowers. Mainly on the exhaust. Keep in mind, these 1500-2000 hour failures on commercial mowers

[@JohnSmith-pl2bk]

Keep cleaning grass out of all the cooling air passages....cleanliness is cool!

[@behemothpowersports5958]

I enjoy watching your guys videos. I mainly sit being a computer all day for work however I like to build things and work with my hands in my spare time. What you guys do and the precision you do it with is amazing. Thanks for the videos.

[@SteveNicoson-u1i]

Thanks for a dynamic video on this engine. It was fascinating interesting and so informative and amazing to watch!!!!! Now if I told you I understood this engine then I wouldn’t be telling the truth. I understand the purpose of this engine and how they basically work; but beyond that I was just following you and absolutely amazed by the great machine work you both were doing!!!!! My compliments to both of you for the fine machine workmanship you did on this old engine!!!!!!! I feel the work you did has this engine ready for many many more days of operation!!! I do not believe many shops would have been able to do what you both accomplished on this old of equipment!!!!!! Like I honestly stared I followed you on the basics but beyond that you taught me great lessons in machine work. Can’t thank you both enough for teaching an old man how to redo an old engine and give it life again for many years. You both did amazing and fantastic machine work here. Wow!!!!! The retired Air Force veteran. 😊😊👍👍✅🇺🇸🇺🇸

[@InquisitiveSearcher]

I was in amazement that such an engine still existed with that heavy of a casting that wasn't out of production in the early 1900s. BUT ! ! !... when I searched for single cylinder pump jack engines I found that there was at least one company still making and selling new ones. I'm stunned.

[@aaronvienot]

Stationary engines can be big and heavy because they're aren't carrying themselves anywhere, which then makes them a lot more reliable and rebuildable. Many of the lightweight innovations in transportation engines have been driven by fuel economy and emissions regulations, with the side effect that they are increasingly disposable after any major failure.

[@theodorgiosan2570]

@aaronvienot It's mostly emissions though. They can be made reliable and fuel efficient and in some cases lightweight too. I work on 70s and 80s Subaru EA series engines. These are little pushrod flat 4's. They have a gear driven cam, no chain or belt. The early ones have removable wet liners for cylinders. The later ones have dry liners but they are nitrided steel so they basically never wear out. I've rebuilt those engines with over 500,000 miles on them and they didn't need an overbore, just a light hone. The rings will wear out long before the cylinder. Never seen one with even the slightest ridge at the top. And they get good fuel economy too, 45 to 50 miles per gallon on the highway. Cheap to rebuild, and typically the only reason they need to be rebuilt is because the rings are worn out. For the 92mm bore engines the one I'm doing currently I've found rings from a GM V6 that match the originals, but are available in a set with a moly steel top ring and ductile iron 2nd. Should increase durability over the original plain cast iron rings. I can rebuild one of these on a table in my shop in less than a day not including any machine work or cam regrinding or crankcase cleanup/corrosion removal. As soon as Subaru went to an overhead cam engine the reliability and ease of rebuilding them was gone. Gone also was the compact engine that only weighed 150 lbs, replaced by a much larger engine weighing many times more. That's when the head gasket issues started as well, they reduced the number of head studs from 9 per head to only 6. The fuel economy was also gone compared to the earlier carbureted engines. The only thing that improved was emissions.

[@dirtfarmer7472]

I had to stop the video 3-4 times to read a comment that I had started. Really enjoyed this video !!!

[@geoffkeahey2651]

Early 80s, I worked as a pumper on a bunch of these. The engines got very little maintenance. The most I ever did was top off the oil and antifreeze. They ran with pretty much little to no problems.That spark plug is not typical, It appears to have been hit, and is not the usual. Very simple and have no water pump to the radiator. I have been told that the old shrimp boats used the same engines.

[@notajp]

That’s called a thermo-siphon cooling system. Farmall used that system on A and B tractor engines back in the forties. I have a 41 B that uses the thermo-siphon system.

[@thomashopkins2609]

When I was very young (3 - 5 yo) I lived in Los Angeles. I remember seeing a bunch of those pumpjacks along the road. I remember calling them grasshoppers. A fond memory.

[@LarryBunch-q7j]

I really enjoy watching you save some of this old stuff! Great video.

[@timmer9lives]

I knew I liked you guys . Anyone who has their pups around the shop has got to be okay people. Neat engine too.

[@wackowacko8931]

Those engine were everywhere out on the prairie in NE Colorado in the 70s. Everyone was pumping oil out of the ground back then, and you could hear them running many miles away when it got quiet in the evening. They are all gone now, the only pumpjacks that are still running use electricity exclusively, because you don't have to maintain them and they are quiet. Running these engines off of NG was cheap, but it was horrible quality. The NG you get in town is worlds away from NG straight out of the ground, the stuff out of the ground is incredibly dirty. I worked at a NG processing facility in the 80s, there were still some pumpjacks and a couple of hit and miss engines still running then.

[@martrg1]

@@wackowacko8931 the gas ones are still there. I've worked on them.

[@jonathanjones7319]

I work on those every few weeks I'll fix up 3 or so. Just about every time one is going to need guides and seats. They are vary hard on them. Had one recently were the seat on exhaust was just about gone. What was left of the seat fell out in my hand when I removed the valve.

[@gunsaway1]

Never saw an engine like that. What a treat! You guys are the pros

[@C.A.L93]

Those putt putts single handedly have removed the shoulders of many Sask Canadian comrades 😂. Feel lucky if your have an electric starter. The hand cranks, paired with an arrow that will run even off slough water, the back fire can be real.

[@GMour53]

We called them one lunger engines. Hand crank to start. Had one with a bad compression release mechanism and had to start it in a Canadian winter by hand. After it was running I felt like I had donated 1 of my lungs to that engine

[@richardharmon4112]

I always learn something new when watching you guys do these jobs

[@ianbates1312]

Old world REAL engineering at its best,,,, I LOVE IT!!!! Thank you 🔧🔧

[@randyrabinowitch3806]

Another fantastic video! I was so happy to have a new episode to watch. Keep’em coming.

[@leonardhirtle3645]

I often wondered what drives a pump jack. Now I know. Thank you.

[@notajp]

That’s technically referred to as a “hot dog down a hallway” fit on the valve guide!😂

[@jadney]

Try a file on the spring with one close would end. See if the close wound turns are softer than the other end, or either end of the other spring.

[@dontblameme6328]

Serious craftsmanship here.

[@andrewgoforth6891]

My 84 vw diesel has over 1/4” play on each side of the exhaust valves and still ran. I put 280k miles on it and still drove fine getting 40mpg but slot of crank case pressure. Only pulled it apart since I pushed the head and swapped oil into the coolant. Totally blown seats and tuliped valves but I’ll get it running again

[@RuralTowner]

Also have an 84 VW diesel. Original odo was already stopped @ 300k when I got it. Got to be a bear start, require the glow plugs even in the early AZ Summer. Had 350 compression. But still somehow still got mid 40s mpg. Pulled it apart. Never checked the valves but all my cylinders were tapered w/ #3 being the worst .006 over spec. Rest were at least .003. Ring gaps you could about measure in TENTHS of an inch. Couldn't afford a proper block job & OS rings//pistons so just threw in a set of standards. Still had a significant gap (more than max spec) but maybe .0625 at worst vs the near .200+ of before. Night & day...could start in Summer w/o plugs & actually worked up to 56 once the rings seated to the bores after about 500 miles. But after about another 5k they wore in more so of course gap opened & settled back into the high 40s.

[@andrewgoforth6891]

@@RuralTowner and it’s probably still running haha

[@RuralTowner]

@@andrewgoforth6891 Still does. Trusty backup now since got an 80 truck but has 86 TD in it.

[@JohnSmith-pl2bk]

@@RuralTowner Did you at least hone the bore to put some cross hatching back on for those new rings to seat properly?

[@RuralTowner]

@@JohnSmith-pl2bk Yes. Did take a hone to them.

[@jonathanhernandez4304]

That's an awesome little mic fixture for setting the fly cutter!!!

[@dusterowner9978]

Oiled his tool and it felt good going in and you guys didn't giggle even a little ??????????? Great call on the knurling . Had a feeling that was where you were headed !

[@JumperSig]

Living outside of Midland, Texas in the 50’s, I could hear those single cylinder engines in the distance at night. It was comforting while I was falling asleep.

[@dennisschickling2249]

Nice Work. The Cleaner does it again. #STAYSAFE #PHILLYPHILLY 🇺🇸

[@Balderoni_]

Knurling does wonders on many different part, been working with one part for industrial use doors and theres a 0.2mm press fit that is achieved with knurling. Just needs a relief groove after the knurling. Awesome video, love your content 🩵👍🏻

[@roberthocking9138]

Beautiful work gentlemen, I admire the quality of your machinery and the cleanliness of your workshop, it’s first class. Great video, I particularly like the work you do on vintage large engines . Greetings from AUS 🦘🇦🇺

[@Carcrafter7165]

This was a very interesting head to see. I never seen one before this was a treat thank you for sharing I enjoyed it very much.

[@clintupham4466]

Used to set valve lash on these all the time. sounded like they miss fired all the time and ran mostly on casing gas from the wells. The fuel was "wet" and therefore burned dirty. So these engines did a great job to chug along and keep a heavy flywheel going to turn the perfectly balaced jack up and down.

[@richb4099]

We called real loose valves/guides like that, 4 speed guides. You could shift them, 1-2-3-4 😂

[@mrricky3816]

Thanks!

[@JAMSIONLINE]

Thank you! We appreciate your support.

[@lineshaftrestorations7903]

Actually, hit/miss governed engines have a means to hold open the exhaust valve. They may or may not have an atmospheric intake valve. More often than not a pushrod controlled intake and exhaust valve engine is throttle governed.

[@richardfehr1838]

Thanks for pointing that out. The governor controls the closing of the exhaust valve. When exhaust doesn’t close, there is no vacuum and the atmospheric intake valve doesn’t open.

[@stephenpoe2037]

Nice piece of mechanical/industrial equipment ! Loved this Video ! Thanks for sharing !

[@mikeburgess7331]

I enjoy seeing a true master at work!

[@natesrace]

Great videos! Not sure if it has been suggested, but an adjustable strobe light would allow you to see exactly what the cutter is doing. Hope this helps. Keep up the great work!

[@enriquegomez260]

Awesome job guys. Really enjoyed this post.

[@clivewilliams3661]

I thoroughly enjoy your content, thank you.

[@themoe6701]

Always wondered what those looked like. When i was a teenager there were tons of these in the colorado mountains we hunted. All night we'd hear putt-putt-miss-miss-putt-putt-putt lol

[@tyverlubarsky7950]

I’m a natural gas compression mechanic that works on these engines all the time C 106 and C 96s I’m also certified by Arrow engine company if you guys want videos and pictures of them, I can provide you some

[@TaroKamome]

As usual, the Cleaning Guy makes the mating faces better than they were when they were new.

[@cyoungso]

I have used Tucker valve seats since 1999. Awesome folks and a great product.

[@Rich-o7n]

If I remember jim commented that the collapsed spring was in backwards and the collapsed part was on top. I'll bet everyone's right about exhaust gas leaking up and If I remember correctly the valve guide came up out of the head and directed the games and only warmed the top coils of the spring and that's why they collapsed. Weird stuff man

[@drcolster]

Great job Guys as always..... I reckon a bit of Porting on the short turns and bowl, that motor would pick up 20 HP....

[@MASTER3RDEYE]

Awesome video. You both are artists of a dying art.

[@kurtisstutzman7056]

That thing is massive...! Those valves and springs are impressive...! I have never seen anything like that...! Thanks for sharing...! Keep up y'alls awesomeness...!!!

[@kurtisstutzman7056]

I'm still waiting to invisibly see something...!

[@pizzandoughnutspage7817]

Gosh a 3 angle valve job and almost a pocket port. Great job guys🤘

[@stevelacker358]

There’s a pump jack near a trail that I hike frequently powered by wellhead gas… except that the prime mover is a Ford 300 straight 6. It’s been running every time I’ve stopped by for about 5 years now, chugging along at what sounds like maybe 1800-2000 RPM. Quite a testament to the Ford 300. The wellhead gas passes through a series of tanks clearly meant to trap liquids, but you know it’s still a mess of natural gas mixed with sulfur compounds (hydrogen sulfide and sulfur dioxide) and all sorts of different hydrocarbon molecules.

[@markchodroff250]

Fantastic job ! Always a great video!

[@raindeergames6104]

That damn casting is so thickkkkk.... that little crack won't do nothing. Good job guys.🎉

[@adf360]

On those valve seat cracks, you can just drill/tap and stitch it. I've done it w/just el-cheapo all thread and had excellent results after you gently peen w/an air hammer to expand and stress the metal into the void, then finish machining it.

[@darylhudson777]

Comparing piston bores to that engine used in the oilfields...the Cummins X15 piston is only 5.39 inch diameter

[@theodorgiosan2570]

I've had valve springs collapse like that before. Not quite that much but they are also much shorter valve springs. 70s and 80s Subaru EA52, EA63, EA71, and EA81 engines. These are engines that cruise at 3500 rpm in the tallest geared cars. In the 70s cars with gearing in the mid 4's, they cruise at over 4000 RPM. I think the springs just wear out on an engine that sustains RPMs that high for hundreds of thousands of miles. I suspect the situation is the same here but instead of time and RPM taking it's toll it's just time. Funny enough the combustion chambers on the Subaru "EA" engines look just like smaller versions of that Continental one. Just a simple bathtub chamber. Inefficient and requires a ton of spark advance to make power. The cylinder heads look just like smaller versions of that C-96 head too, but doubled.The service manual for the Subaru EA71 actually gives a procedure for checking valve spring length because it was so much of an issue.

[@Cairos1014]

That was fun. Thank you for sharing this. That was your Monty Python "Now for something completely different..."

[@logancarter2134]

Another fantastic episode

[@popswrench2]

tore one down , natural gas pump station ... they are slow , long life and KooooooooooooL.... work GREAT if safety shut offs are in place too 😊😅

[@judgehastheword9069]

That is so awesome. I feel the same way I would of like to see the whole Engine is the piston an block. And see it running. You said it had a 7 1/4 piston. That is bigger then most semi motors.

[@malcomsue]

Fascinating, you guys always have interesting content.

[@CarlBright]

Love vids on old engines!!!

[@ChristopherPrisco]

Gotta love the hand behind the back safety technique,😜

[@smathet7766]

I’ve rebuilt lots of those engines in the shop and the field. Guaranteed that thing was burning engine oil. Usually the combustion chamber looks like a tan powder colour.

[@jeffnolan7392]

Hit and miss engine intake valves are called "poppet valves", any valve opened by vacuum and sealing against compression, such as a check valve that has a poppet valve in it. A poppet valve can also be opened by pressure and seal against a vacuum, as in a trash, or diaphragm pump.

[@billhatcher2984]

It's easy to tell if the spring has lost its temper put it in a vise and squash it and check the return or stretch it on the end you think it collapsed and see if it stretches

[@darylhudson777]

Those oil pumping units we're referred to and maybe still referred to as grasshoppers because they look like the back legs of one

[@greavous93]

I would say the spring got so hot it lost its temper and those 2 or 3 coils collapsed as we see now.

[@battleaxefabandmachine]

I cut a caterpillar for counterbore shims a while back. I saw a small crack in the lower ledge. It was barely visible. I showed the customer, and he said run it. I decided to take a picture with my s22 phone. When I blew the picture up, it really showed the crack. He had my cut deeper to get below the crack. It's amazing what you don't see and what technology can do.

[@jonqualey2204]

The only time I've seen a spark plug like that was in an old engine text book from the 1940s.

[@JohnSmith-pl2bk]

Probably when this Arrow was made....or at least....designed.

[@theo1113miller]

I hope you charged extra for "porting" the head..... 😂

[@Thomasgarrick113]

I have to wonder if they have a rocker arm problem on that one valve that caused it to wear so one sided the oiler to the rockers may have been stopped up

[@BillMalcolm-tn3kq]

I wondered about that too. A few hours of running again and the new guide might be toast as well. Hope not.

[@myrandabrown]

I’d like to request more doggo guest appearances. ❤

[@41Zman]

It's a modern version of a Fairbanks Morse Zc 118 or 208. The spark plugs are usually 7/8 thread with a long reach electrode

[@matthewharrington2431]

Diesel Murray mechanic so awesome what you guys do

[@justinschroder6094]

LOL...Audibly hear, front windshield, VIN number...that was funny. Pretty dog!

[@BookkeepersHusband]

This thing was rode hard and put up wet! Never seen a valve seat area beat up so bad! 😅

[@keith0alan]

I had an Ajax, precursor to that engine. It had run for 50 years pretty much non stop. They definitely last.

[@LaLaLand.Germany]

That knurling tool is awsome, I have to scower Ebay for that- Chinesium won´t do it. I tried a tap set once- worked for aluminimum but just barely… You guys are awsome, I wish You´d always be booked out, kind Regards