Link to the engine teardown video on the 6-71: kzfaq.info/get/bejne/brWpo8J6zriVlWg.html

Trying to kill that old Detroit was about as difficult as keeping new shit running 🤔

If it had a coolant system on it it would probably still be running lol

Thinking that engine pushed a bus for a couple of millions of mile and didn’t complain is sad . They were masterpieces of their time and much respect !

Those old 2 strokers were screamers. Had a lot of fun with them back in the good old days. We will never see engines like those ever again.

It was amazing how this poor engine held up but it still makes me sad when people destroy engines on purpose.

They were phenomenal engines for their time,no other inline six in the world could run that long under wide open fuel and no coolant.

That 2 stroke sounded in good shape when it first fired up.....can’t believe it stood the test at full throttle for so long without any coolant. What an awesome engine. It’s a tribute to GM I drove one for years. Used a gallon of oil every 500 gallons of diesel and started even at 30 below. Hit the starter and turn it over several times. Stop. Wait a few seconds to allow the heat to transfer a bit in the cylinders. Fire it again and she’ll start every time.

Sad to see a great old engine like that being destroyed. I operated heavy equipment with those engines in them. lots of noise but would run three shifts every day no problems.

The 6-71 was first built in 1938 and used in war production, the Gray Marine 6-71's were used in almost all the landing craft all over the world, Detroit Diesel stopped making the 2 stroke 71,53 and 92 series in 1995. I operated and worked on hundreds of them in my 26 years in the military, they were good reliable engines that you never had to worry about anything in a 5 foot radius of rusting because it was always covered in oil!

Can't help thinking someday we might wish we still had these engines around.

I hate to see them go, but love to watch them leave RIP 71 series!

It’s sad how people don’t know these were some of the best engines ever made, and they’re getting pretty rare especially when people make them blow up on purpose which I’ve seen done many times

You cant kill a detroit. Even after running wide open it still wants to start and run. Amazing piece of equipment and history as well.

I can be the only person who feels sadness while watching these videos. I just tell myself it's for science and proceed to "believe" it's justified.

😂 Well, that was fun! I’m retired now but for most of my working life I ran large stationary diesel generator sets (Air Force & public utilities). It’s been so long, I don’t remember model, displacement, etc. but we had these two Nordberg 1000 kW units that were 7 cyl in-line 4-strokes. I think the cylinders were 18” diameter with a 32” stroke. Roughly 13’ from the bottom of the oil pan to the top of the rocker covers. Nominal speed was 327 rpm. They were a ball to operate. The cast iron pistons were prone to breaking around the ring grooves. It happened to me one time. What a racket! Two crankcase explosions in rapid succession filled the plant with thick black smoke. They had spring loaded crankcase pressure relief valves or it would have detonated. I ran out the side of the building and had to re-enter to shut it down at the front of the engine. The mechanics said the CC explosions were very minor. What a rush! The serial numbers were 3 and 187. The first two built were sent to a Texas oil field where one of them exploded and killed every man on the crew. After that they installed the CC pressure relief valves. That was in 1948. I worked there from 1983 to 2000. After I left, they closed the plant. It’s too bad. Should have made a museum out of the place. Oh well.

I was really impressed how that old Detroit 6-71 suffered that punishment! Unbelievable! I was holding my breath and thinking any time now for it to blow up or for that matter to lock up! Tough, Tough old motor for sure!

THAT JOKER IS BUILT TO LAST. HELL YEAH BROTHERS. ALWAYS DOING IT FOR DALE EVEN IF IT IS A 2 STROKE DIESEL!!

Back in the early 90s when I was a diesel apprentice tech, all we did for months was tear apart these engines for cores. An old man who is long dead now used to bring them on pallets by the dozen. Whenever there was down time from slow work, we went out and filled a whole bay with these things and tear em down. Brings back memories.

Discovered this channel last night. This is my 5th video watching. This dude is very knowledgeable about engines. Very impressive

i felt sad to see this engine being destroyed . i like your videos i will stick to watching your engine rebuilds no more runaways for me . cheers . yes i am an old timer

Those old Detroit’s were amazing engines in their day...and “their day” lasted for about 60 years so Detroit did something right...aside from their noise, their biggest down fall was their fuel consumption...I worked at a construction company that had a mobile crusher and we brought it to a big rock job we were doing...the crusher was run by a generator that had a rather large Detroit in it..V16 if I recall... when they fired it up it ran like a champ but loved it’s fuel...so much so that the superintendent rented a brand new Cat generator to take its place...after about a week of running the Cat he figured the cost of the fuel saved paid for the rental of the Cat generator...I believe they scrapped the Detroit generator after that job...it was a shame really cuz there wasn’t a thing wrong with it but it was made back in the day when diesel was 10 cents a gallon...if you had endless amounts of fuel to run through it then it likely would have kept running for decades!!..the 671 was one of the best all around engines they ever made...this abusive run is a testimonial to how tough they were!!.. good video!!

Whatever people might say negative about a 2-Stoke Detroit Diesel especially the 71 Series no one cannot deny the fact they are tougher than woodpecker lips. It absolutely amazes me that the 6-71 was made basically unchanged for 75 years and the only reason those oil drooling annoyingly loud pigs that turn diesel fuel into noise and smoke without making horsepower is the government basically outlawed them because it sure and hell wasn’t because Detroit Diesel wanted to quit making them. Personally I have a soft spot in my heart for the green leakers’ mostly because the first truck I drove for a paycheck had a Buzz’en Dozen in it.

Just OUTSTANDING!!!! I mean can we appreciate what this Detroit just did?! It served a long long life and then gave us a spectacular ending that no new shit could come close to……. WOW WOW WOW 🎉🎉🎉🎉

As long as it had oil and coolant those things will run forever, literally! Most underappreciated engines ever!

And this is why I love old Detroits let alone good old engines, they're tough as nails and hard as hell to kill em off.👌

Greatest diesels if all time! Got a cult following for its simplicity, ruggedness, amazing sound, war heritage and smoothness. Detroits are timeless classics. They deserve a full restoration in a truck or mounted in a man cave an run with the boys over a beer!

it hurts! LONG LIVE DETROIT!!!!! if i find a 6-71 in a scrap yard it will have a honorable spot in my junk collection for life

I have a 1954 Greyhound coach, with the 6 cylinder. I am extremely impressed with the power of that engine !!! I had no idea !!! Way to go DETROIT DIESEL !!!

Holly shit! I just gained so much respect for a Detroit 2 stroke after that.

I don’t know exactly why, but this type of entertainment never gets old.

Well damn I am amazed how easily that thing started up.

This reminds me of our old compressor engine on the rig, went from zero to all hell is breaking loose right next to your head, ran for years that old 2 stroke.

your delivery of commentary is every bit as good as anything you actually put on video-and i love all your videos. good to see ya man and look forward to the next one

Thank You. That was spectacular, I would have never guessed it would have lasted that long, very impressed.

I know you have plenty of these old Detroit’s to destroy it’s great to whatch I use to run these same engines in the trucks I drove and had to fix back in the early 80 and late 70 on the road and the farm always loved these screaming demons keep em coming thanks agin for sharing

You literally had to turn the oil into steam with the patience of a Monk to make that thing "seize"...my Lord what and incredible piece of engineering!

Great way to de-grease an old Detroit, just bake it off! Great vid, amazing she held on that long with no coolant.

This dude's content puts a smile on my face.

One of the best engines ever produced!

I'd always be going around the back of the engine. I'd be so afraid of just casually walking around the front where that fan is. lmao.

Thanks for the time you put in to let folks like me learn about how diesels work- and come apart. You are a good, clear explainer for the new and ignorant.

That old Detroit got a mean 2 step!!

is your engine running away? THEN YOU BETTER GO CATCH IT! 🤣

A true Detroit. Drips oil like an old dog wanting to go outside. An old timer told me you can draw a picture of a Detroit on the wall and come back ,It'll be dripping oil.

*They used to put these old 6-71 and 8-71 engines in many trucks, buses, and boats back in the 80s and early 90s. You can't miss the sound of one of these engines hammering down the road, like music to my ears.*

Those things moved so much air that they could self cool the liners while revving to the stratosphere. As mentioned before, the rev limit when full-rack is usually valve float. Would be cool to hear one with a Jake rev and throw the jake:)

Dirty, greasy, and beautiful. The very peak of American motors.

The neighbours must love you.

Yes! My Nebraskan neighbor is back with more activities that you should only attempt at a BAC of 0.10.0 or greater!

Early 80's ,I ran Captain on 110' offshore crewboats in South Louisiana. With a fleet of over 40 vessels, (all aluminum hulls ,which were like carbon fiber today.,,,I choose the older crewboats,(the owners collection,lol.)( built like a Cadillac,,,but sound like the engine room was going to explode any minute running 4, 6-71 in a aluminum hull,(i ran mostly only 2 engines,,, wide open 5+ hours at a time.Very dependable engines,,,,just add oil and go fast. thanks for the FLASHBACKS!!☆☆

Excellent video, thanks for sharing.

My last boat had twin 6-71 turbos, they ran beautifully. After 700 hours of use, I never had a single issue. When I sold the boat, they had 1,900 hours and would barely blow a puff of smoke upon start-up (normal) and ran clean. I used Lucan during oil changes and it stopped the oil burn. They are EXCELLENT engines. Change the oil and fuel filters and they will run for ever.

Driveway looks great

We will never be able to make engines like these ever again.

That video was legendary!

Can’t wait for the smart-asses raising hell about why you didn’t dump thousands to restore it to its former glory. Keep up the good work bud! sending ya tons of love from Saudi Arabia

My first truck was a freightliner with 71 v 8, next one was a 8V 92. Love the sound.

Well…that engine spent the whole of it’s working life…giving the environmentalist a two fingered salute….in its final run…a Smokey outdoor …single finger one ! Great videos thanks

Thanks for sharing this video friend. All of these years operating equipment and driving trucks I have never seen one of these engines lock-up. They are definitely a mighty tough engine and I have gained a whole new trust for the 671 Detroit diesel. Thanks for your time friend.

I did this in Iraq to 2 hmmwvs with the old 6.2 in em back when our government didn’t leave good equipment for the enemy to use. No oil, no coolant. They ran for over 45 minutes until they slowly died. We were able to start them back up after they cooled down but not for long

Excellent video, very strong engine, it held up very well with no cooling. Please keep posting more of these engine vids. Thanks.

Aww hell yeah man I love the sound of those! Just pure 'Murica right there... oooh i can almost smell it, too... awesome. Just.... fkng awesome I think. Almost comforting in a way as well lol thanks!

Love the video, but pretty happy I don’t live next too this guy. God speed brother

I need an 8 v71 and a 12 v71 to through outside and run . Reminds me of my dad's trucks he had back in the day. Don't worry the neighbors will love the music . They don't have a choice

Good ol screaming Jimmy's. Love to see the content. Thanks for the piston/connecting rod from the giant CAT engine, hangs in my garage. Great content, keep up the good work.

Destruction. I like it. SUBSCRIBED!👍🏼

This is my favorite sounding engine,The world's greatest ever built

I worked on the 671 back in the late 70's to early 80's in the Navy. Love that engine and it's sound. Operated "pusher boats " in Subic Bay boat pool. Had two 671 Detroits and even an LCU from WWII with 3 of them for propulsion and 2 471's from generations. Lots of FUN. It was interesting to see you run that one so long and not see it fly apart! Very COOL. thanks for the video. Brought back a bunch of Good memories. 🇺🇲👍

Cummins X15: "ever mainline a 5er of diesel?" Detroit 6-71: "hold my governor."

I am a retired diesel tech of 40 years. That inline 6 71 could have been sitting for over a year. I worked for a company that was shut down for 14 months. Had to get several trucks started. Installed some batteries in a truck with a 6v 71. It started with only 1 revolution. Now of course, if it had been cold out that would not have happened. Now the older 6 71 ,if it had an injector stuck in full fuel,it would keep the other 5 in that position and run away. The newer ones had what was called a broken backrack. That would allow the other 5 injectors to return to the no fuel position.

Beautiful huge piece, running nice for its condition

I like that fact that you still have some engine build videos on your channel! Those ones are my favorite

The ol Detroit refused to die! Great video.. thank you

My hat is off to the GM Engineers that designed this bulletproof workhorse! We need you back!!

Having run these mighty engines on tug boats and trucks for years, this was like watching the end of Brave Heart :( Poor motor was freaking hero!

Side-by-side to one of the caterpillar engines. See who wins. Let’s see who is re-buildable!

Just like Deboss....the old Detroit Diesel guy said he'd never seen one that wouldn't start that didn't have something sticking out of the block...amazing they don't seize! Theirs was a 16V though.

6-71 great motor. Routinely outlive what they are bolted into.

That thing sounds amazing 😮

Without watching I know this will be painful to watch yet so satisfying......based on the notification

Glad you’re back!

Thanks for the videos that you make. They are very interesting and informative. Back in my days on the family farm, we had several Cat tractors. A D4, D6, D8 and the big guy, a D9. I always enjoyed driving them, at least for the first hour or so !! 😝😝

I watched the whole video. Thank for Sharing

Dude! The environment! Bwah ha ha! Thanks for the entertaining video. I can only imagine that if you'd hooked up a cooling system to that thing and a bigger fuel supply, it could have run for days. Incredible.

Inline 6cyl engines (iron blocks) both gas and diesel are usually much more durable than other configurations. Great vid!👍

Awesome demonstration!

Love the straight six sound!

What i love about these videos is that everyone seems to have a huge bit of land to do what ever they want. In the uk we live in boxes with a garden about 40ft square !!!

It is amazing how damn simple those engines were.

The Detroit diesel engine is not a 2 stroke but a 2 cycle engine. Lovely engines. I worked on many of them 😊.

dude, this sound so awesome!!! i love it so much

Glad to see you uploading

2jz: I have the best 2-step of any I6 on the planet. 6-71: Bitch, hold my beer!

That was one tough old girl there want to hang on as long as she could 6 71 Jimmy was the first engine got to really work on my 20th birthday God that was a long time ago great demonstration I've only seen one run way before

I can't believe the amount of abuse this old thing took! Holly crap

glad you're back!

That ol’ 671 in my grader is still running strong .It’s amazing how much punishment they’ll take .

The Detroit diesel engines were a great power plant !!!!! Much better power to weight ratio than all the rest including diesel engines today!!!!

That 6-71 a real trooper. Went down with a solid fight even with all odds against it