Running the rack on a Detroit Diesel 8V71

Long shrouded in mystery and done by what seemed like magicians, running the rack on a 2 Stroke Detroit Diesel is actually a simple job. It only requires patience and a few tools. In this video we adjust the air gap, injector stroke( rack), idle speed and buffer screw. While there we verify the adjustments of the valves, jake bridges, and injector height. This applies to all mechanical injected 53, 71, and 92 series engines. Please refer to the Detroit
#8V71
#detroitdiesel
#2stroke

[@dillonazure1580]

Going from never knowing about these, to having to re assemble/ rebuild one in a couple months time, this video was helpful. these are some interesting creatures.

[@LacroixCruiser]

They sure are

[@russellking9762]

You Sir could easily have been a brain surgeon…a true master at his craft…thank you!

[@LacroixCruiser]

Lol, not really, I don’t do blood well

[@RollingLiving]

Wow, how did I miss this in your series of great videos? I thought I'd watched them all, but this just popped up in my recommended feed. This is the best, most visible "running the rack" demo video I've seen done. Thanks for taking the time to film and share this.

[@LacroixCruiser]

Thank you!

[@chuckdykstra3020]

Another great and informative video Yvan. Thanks

[@JeffinTD]

Excellent. Thanks for taking the time.

[@donnebes9421]

Thanks for the video. I always enjoy learning something.

[@LacroixCruiser]

Learning is one of the best things in life.

[@brucefay5126]

Nice explanation. Thanks.

[@44skillet]

Excellent video and narration

[@LacroixCruiser]

Thank you

[@anthonysovis2280]

Very good video and explanation. Thank you!

[@LacroixCruiser]

Thank you for watching

[@b374mxg]

Went to trade school back in 1973-1974 and my instructor was a total expert on Detroit's. Had no idea that you were super well versed on the 2 stroke. Very different from ONR!! Love it and thank you.

[@LacroixCruiser]

Thank you.,

[@Chesterbarnes1]

Very smart mechanic

[@7382jmjh]

Thank you very much for the explanation. It is true!!! this is how to calibrate a 71 series or 92 series

[@hudsonhawk0016]

A real certified KZbin mechanic. Inside joke. Great job!

[@markjaeger6467]

Nice refresher on how to adjust one of these..

[@LacroixCruiser]

Thanks

[@jaybjornbjornintheusa3039]

Great video, I have a 85 8.2 dd turbo and love it

[@LacroixCruiser]

Great!

[@raymondarias8459]

Excellent explanation, you are the man , and I just became your faithful follower, good job , god bless you 👍

[@LacroixCruiser]

Thanks and welcome

[@damiandiesel1]

Back off all rack adjustments before setting #1L and #1R injectors to full fuel. Then set remaining injectors to match both #1's.

[@hansenpascua9704]

Hahaha

[@jimclynes7026]

Thanks for sharing all your knowledge. Tomorrow we seal up the return and pressurize the fuel system to look for my leak. 6v53. Most likely around one of my injectors or supply tubes.

[@LacroixCruiser]

Enjoy the process.

[@tttony9426]

your a great teacher,

[@LacroixCruiser]

I appreciate that!

[@badboyr66]

Fantastic video..thank you

[@LacroixCruiser]

Thanks you!

[@JesusTorres-qr1gz]

Very nice man, my most expressive thanks for sharing it with us, most kind of you, blessings to you and love ones, from Puerto Rico Jesús Torres.

[@LacroixCruiser]

Thank you.

[@JesusTorres-qr1gz]

@@LacroixCruiser you have an excellent vision, I was born and raised in the gasoline and diesel industry, worked for cummins engine company for 30 years but never had a chance to learn to do the overhead setting on a ditroit , at 68 years of age you have given me that priceless oprtunity, I have no words to express my gratitude, most kind of you sir, from Puerto Rico Jesús Torres.

[@LacroixCruiser]

Thank you!

[@busoldmanphil7293]

I just discovered your channel, Ivan. Now I have a place to go to renew my knowledge if these 2 strokers. Your explanations are so complete and the audio is so clear. You could drop the music on your other videos though, it is just not necessary. It's like having someone next to you talking when you are slow-dancing with a beautiful warm chick.

[@LacroixCruiser]

Beautiful analogy!

[@johnwad7468]

I remember well the busted knuckles on both hands during my 25+ year's as a Diesel Mechanic. I loved the 2 stroke dietroit for what it was.

[@LacroixCruiser]

It’s a great engine.

[@johnwad7468]

@@LacroixCruiser and the 2 stroke design is used exclusively in giant stationary or ocean going ship engines,as I'm sure you already know. No way going to waste movement of giant Pistons and connecting rods on a intake or exhaust stroke,in those huge crosshead engines.

[@LacroixCruiser]

Yes,

[@nelsontorres380]

New subscribers sir, definitely very impormative..i have struggled setting governor and the rack, we got Detroit 6v53 model..

[@LacroixCruiser]

Nice engines

[@b374mxg]

I'll have to look for a video on replacing the blower dog bone. We used to see them once in a while. Brings back a ton of memories on the old 318's

[@LacroixCruiser]

It’s easy to replace, take off the power steering pump, you then remove the snap ring, remove the shaft, then reverse to get back into service.

[@rogeryoung2049]

you should set 1 left and then 1 right to balance the injectors on both banks to set the control at the governor and then set the rest as Damian Frattasio has suggested. You don't need the wedge as I use the .200 thou gauge from Kent-Moore and it sets the gap accurately and saves time for adjusting the governor gap. Just some suggestions from a Detroit mechanic

[@LacroixCruiser]

Thank you

[@JohnSmith-wb6kq]

Hi Roger, can you explain why you have to have the air gap please, is it to stop the gov interfering with the high idle? I've often wondered what it's for cheers

[@LacroixCruiser]

That’s correct John.

[@dirkmanning8621]

Can you explain if you push the 200 thou gauge between the counterweights or do you use it directly at the gov gap with speed control at full throttle? Explain how you use the KM gauge. Thanks.

[@williamsultan3420]

71 series with break away rack? Great video, definitely better be thorough when working on these. Nice job!

[@caterpillarman456]

The slight chatter noise as you rotate the engine is injector nozzle "chatter". and is a good indication of nozzle condition.

[@vicpetrishak7705]

Before installing and tightening fuel crossover lines dip in motor oil , this will lubricate the fuel line nuts before being torqued . Detroit Diesel music to my ears .

[@LacroixCruiser]

Thank you

[@user-sh6gr1uv3f]

Очень познавательное видео👍

[@roneliorogan373]

Very informative.. thanks. I start now working with 6-71 engine 1938. I will it there how it goes.

[@LacroixCruiser]

1938, wow, goes to show how durable they are. Enjoy your rebuild.

[@josephherrmann6304]

Where did you learn all this? Great knowledge of engines.

[@LacroixCruiser]

From a great man who’s been repairing them for over 50 years

[@gruponemesis]

WOW!!!!!!!!

[@LacroixCruiser]

Thanks

[@7280452]

Love, love, love the information you put out but I'm wanting to get the tune up kit with the wedge, height setting gauge, special socket for the fuel tubes, etc. etc. Is there an all in one set ?

[@LacroixCruiser]

You will need to search

[@caterpillarman456]

I seem to recall adjusting the governor gap with the engine running. It had to be .0015" gap. A PITA to do.

[@graemegaerth14]

Great show, I've been a Detroit operator and fan for years. They can be agricultural though very Technically specific on tuning but you just have to love the basic simplicity, they had a job to do. Turn clean fuel and air into beautiful music. On that and off the subject many many years ago (40 odd) I had a couple of injector height tools and found they were perfect for setting injector pump timing on a 3208 CAT. .Never bothered to find out what the CAT tool was.. Just saying. 😊

[@LacroixCruiser]

Thanks for the info!

[@chuckdykstra3020]

Is your cotter pin missing at the pin you rotated to see if the rack was too tight? Thought I saw it missing.

[@allancrow134]

That was really cool, that looks like a fairly modern 871. That's the cleanest Detriot I've ever seen, barring complete rebuilds. Like the blue paint. Year?

[@LacroixCruiser]

It’s a 1984 block

[@MrMercurymark]

Top Top Top. 🇧🇷🇧🇷🇧🇷

[@LacroixCruiser]

Thank you

[@rodolforuiz4522]

Thanks for a such an instructive video. Overhauling a 6V92, this video has come to save my day. What oil should be used with the 6V92 and anything to be careful with during first engine start?

[@LacroixCruiser]

You want to use 40w CF2 rated oil. Be mindful that your rack and injectors move as they should, that you’ve pressure tested your fuel system, and that you’re ready to smile from ear to ear when it fires to life.

[@rodolforuiz4522]

@@LacroixCruiser Thanks! Got SAE-40 CF-2 oil, followed the manual for variable speed governor to set the gap and the rack. Hope to do first engine start tomorrow or the day after.

[@LacroixCruiser]

That’s great, have fun!

[@rodolforuiz4522]

@@LacroixCruiser Enjoyed listening to the 6V92 coming to life today! Installing it on the rig tomorrow. Thanks!

[@jk-mb2if]

Hello and thank you for excellent lesson. I noticed a very professional paint job you have done. What paint do you recommend ?thank you.

[@LacroixCruiser]

On the engine we used tractor paint.

[@trail457]

Great video,What do you do without that governor tool to adjust the rack?

[@LacroixCruiser]

Make or buy one, it’s basically just a wedge

[@damiandiesel1]

Remove the governor cover and run the engine 'manually' to 1800 RPM (check the book on this number) and check the gap. Adjust as needed. It's in the book.

[@gordoncorey8023]

We used oil on top of the injection

[@LacroixCruiser]

Yes a drop of oil allows you to see in the tool has contacted the surface.

[@Mykaruvi]

Good video sir ,mines detroit engine rpm comes down from 1900 to 1300 rpm at crane when do multiple operation I will check what u have said thanks for the video

[@LacroixCruiser]

Thanks for watching

[@Mykaruvi]

@@LacroixCruiser sir your video i watched last night couple of times and adjust the same what u said actually worked,engine stops from dying when crane had full operation

[@LacroixCruiser]

Nice to hear

[@ericm6614]

Thank you for the vid....What is the part number of that socket you are using on the fuel lines? Thanks

[@LacroixCruiser]

No idea unfortunately

[@timothywood4402]

Question: Does this video cover a Variable Speed Governor ? It looks pretty different than the one in the video as mine has a short plunger guide with a variable speed spring. The part where you have the idle adjustment screw is not the same here either once the two bolts are removed the end with the speed control lever etc ., idle screw etc comes off totally? I have a issue with the idle adjustment will not adjust properly and the engine is at 1500 rpm’s at idle. I believe it is binding internally at some point. Thoughts??

[@LacroixCruiser]

Could be binding, I suggest taking it apart, and ré-assemble per the manual.

[@steves.6054]

Hey Lacroix, do you have a part number for the wedge and the Jake tools? I am in the middle of this mess and would like to do it right. I am replacing all of my injectors due to a fuel system mishap that is costing me dearly. Your video is the best and your reply will be appreciated

[@LacroixCruiser]

www.toolsource.com/engine-service-tools-c-114_117/detroit-diesel-engine-tuneup-kit-53-71-92-p-141409.html

[@steves.6054]

@@LacroixCruiser Thank you very much. That helped to have the part numbers.

[@LacroixCruiser]

Anything to help.

[@Killmonize]

Question for these 8v71 that had power steering . What fluid would you use. Mine is making noise like its low but has enough fluid in it.

[@LacroixCruiser]

Many different fluids were used. Look at the colour of your fluid, if it’s red, then it’s ATF, if it’s caramel then anything from 10W to 40W engine oil may have been used.

[@Killmonize]

@@LacroixCruiser thank you for the quick reply:) I will check it out.

[@jamessheppard1697]

How thick is the wedge? I need to make a tool like that. And how thick is the tool for the Jake brake?

[@LacroixCruiser]

Unfortunately I don’t know

[@user-sh6gr1uv3f]

Подскажите должен стоять клапан на обратке топливной магистрали. 6v92 серии

[@brycepender6001]

All I need now is truck with a Detroit.

[@michaelsorrentino9279]

My terminology is a "JAM NUT" Ja

[@LacroixCruiser]

Good

[@timothywood4402]

Great videos. We ran an 8-92 natural marine and it has 62,000 hrs.over 41yrs.but gave up. We came across an 8-92TT marine running takeout with 7500hrs..question what is the lifespan for this type engine oh it’s the 750hp rated one

[@LacroixCruiser]

750hp cuts into the life ( the more HP the shorter the lifespan. Also be mindful of the limitations of your transmission with that much power. With that said if it took you 41 years to accumulate 62,000 hours, you’ll probably get a good 20 years

[@wc2matthews]

New to the 8V71 family I have a 68 Silver Eagle motorhome was wondering what if any is different between non-turbo and turbo engines for example I have been told different crank, pistons, by various mechanics. being low budjet I would like to add a turbo to my original engine (after of course a fresh rebuild) is this possible? Do you have a video? or can I suggest new content for a new one? thank you.

[@LacroixCruiser]

Unfortunately not, but from my reading all that’s common is the heads, and the accessories. Block, pistons, crank, cams, and rods look to be different.

[@mysticridgedesign9857]

Hello. I am currently working on a 6v53t and wondering if you have a tool list with part numbers so I can find these gems? Many thanks in advance

[@LacroixCruiser]

Unfortunately not, I borrowed them from a friend.

[@tlfrantz1]

Can you do the same video for a 6V53 engine? Thanks!!

[@LacroixCruiser]

The technique is the same

[@waynepalmer5368]

Great video, i am in the process of rebuilding a Detroit Diesel 8v92 marine engine. Is it possible you can provide me with a link to purchase the service manual

[@LacroixCruiser]

Unfortunately not, but you can often find them on eBay

[@Pinko633]

Great vid but i didnt think you could do that on a cold engine i thought you had to warm it up first

[@LacroixCruiser]

I followed op the book

[@bronberry7081]

Do you know the reason that exhaust temperature is much cooler on 1 side vs the other? 8v71

[@LacroixCruiser]

It shouldn’t be.

[@epskurt128]

Close, but not quite right!

[@briananderson3801]

There called Flags

[@LacroixCruiser]

Different mechanics and sellers have different terms

[@speedracer3033]

Is this the same process for running the rack and the gov. the same for 6-71?

[@LacroixCruiser]

Yes

[@speedracer3033]

@@LacroixCruiser Thanks, and please keep sharing the knowledge a great videos!

[@larryjohnson3751]

Dose the 12v71 marine engine valves adjust the same way

[@LacroixCruiser]

Yes

[@theq4602]

If you have any literature on these old detroits or know where I can find them please let me know.

[@LacroixCruiser]

I don’t unfortunately

[@briananderson3801]

Thank you that is called a flag that you just set the injector with the little t shape with the spindle on top to hold it there are different colors brown ,white and ,black so on

[@LacroixCruiser]

The ones I use are not colour coded, instead they have the actual measurements on them that correspond to the specifications given in the service manual. You see me using it around the 8 minute mark in this video kzbin.info/www/bejne/iaLInamIhcdgl8k Here is what the tools look like www.otctools.com/products/injector-height-gauge-set

[@briananderson3801]

@@LacroixCruiser yes mine are very old lol , those are what we called flags ,,,thank you so much for showing these on the Video I have rebuilt so many 71 ,92 s the very first one I did I was only 12 YRS old and it was a in frame overhaul .

[@JohnDoe-nn9jv]

Any suggestions where a fella might find a wedge tool?

[@LacroixCruiser]

Snap on

[@agustinpastoriza6931]

2 stroke Detroit Diesel engines are hot building toda y, why

[@LacroixCruiser]

They are fun engines , easy to work with, and sound amazing.

[@WARD5KUSTOMZ]

Will this also work on a v53?

[@LacroixCruiser]

Yes

[@WARD5KUSTOMZ]

@@LacroixCruiser thanks

[@WARD5KUSTOMZ]

Somehow you made this look very simple and easy. The rest of the videos ive watched confused me

[@LacroixCruiser]

WARD5KUSTOMZ thank you, yes that’s the goal, and it is easy.

[@grumpystruckshop3807]

Beats me why people call the throtle control rod, the rack, when the rack is in each injector,!!!

[@LacroixCruiser]

Tradition I guess

[@andrewking9761]

All the injectors are set the same off the first 2 as it says here. So depending on how many cylinders they all work as one

[@kshansen3]

Kind of an off the cuff question, but what effect would you see in the operation of an engine if the governor gap was too tight or too loose? Also might be nice to point out that the injector control tubes on the older engines had two screws in place of the one adjusting screw and jam nut. Adjustment procedure is pretty much the same, just need to back off one and tighten the other. As for the term "Run the Rack" I think it would make more sense if one just added an "S" to the end of the work "Rack". Or even said "Adjusting the Racks" but this is a "Detroit Class" not "English Composition Class!" If you want some excitement adjust the rack with the shut down cable in the stop position then fire it up! BTDT once!

[@LacroixCruiser]

That would be awakening for sure

[@kshansen3]

@@LacroixCruiser Yes a 12V-71 going full fuel on start up will get your attention. Only thing that saved me was the flapper valve in the emergency shut-down worked!

[@luisromerogomez4421]

I have a Lot a question bot a speak next languaje bot i see that sr that you now a lot tanks sr. Se from Nicaragua we love Detroit we work ay too caribean see

[@user-sh6gr1uv3f]

Здравствуйте. Подскажите пожалуйста зазоры клапанов и высоту форсунок, 6v92 заранее благодарю

[@LacroixCruiser]

Unfortunately I can’t copy and paste the text into my translation app.

[@user-sh6gr1uv3f]

Andrey Pet... Hello. Please tell me the valve clearances and the height of the injectors, 6v92 thank you in advance

[@LacroixCruiser]

It varies depending on the year and turbocharged or normally aspirated. f01.justanswer.com/spankyjr1/a39012a3-3a7b-420d-b71b-d9f3af53898e_92_detroit_valve_adjust.pdf

[@user-sh6gr1uv3f]

@@LacroixCruiser With the turbo boost 350 hp. 6v92

[@user-sh6gr1uv3f]

1993г.kenworth t800b

[@L.A.Concrete]

😂😂😂😂 6:46

[@LacroixCruiser]

🙏🏻

[@ronmatthews853]

&

[@captjoel411]

Your whatsaap pls

[@LacroixCruiser]

I don’t have one.