Runaway 6-71 Two Stroke Detroit Diesel - Double Greasy Detroit Revival

Revival of a 6-71 and a 8V71 2 stroke Detroit Diesel, and the 6-71 runs away.

6-71 valve cover is SOLD.

0:00 - Intro
0:55 - Starting and running the 6-71
6:27 - Starting and running the 8V71
14:45 - 6-71 running with an airbox cover off
15:52 - 6-71 runaway
22:06 - Trying to restart the 6-71
25:30 - Blower turning on the 6-71

[KTE]

Link to the engine teardown video on the 6-71:

[thomaskirkpatrick]

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.

[mikekopie]

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

[h]

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 !

[KittyMeowMeow.]

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

[rusty]

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.

[canvids]

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.

[brownhorat]

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!

[at]

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

[nunyabusiness]

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

[OldDocSilver]

That 2 stroke sounded in good shape when it first fired 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.

[mikeworkman]

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.

[williamtell]

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!

[gullreefclub]

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.

[MrMan]

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!!

[vicegripsnchannellocks]

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

[garyharrall]

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.

[weofnjieofing]

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!

[Nolan-vw]

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 !!!

[jeepercreepers]

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