Cat 3116 Rack Adjustment Part 2, Prepare for a Headache.

In this video we are working on getting the rack sync, fuel setting and injector height done, with some of the right tools. We will get it to work even without the right tools. @AdeptApe on Venmo or [e-mail] on PayPal for donations, thank you so much for supporting the channel!
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Allstar Oil Pressure Priming Tank: amzn.to/3L5pASm

[@AdeptApe]

Hope you enjoyed watching me suffer through trying to get this rack sync done without having all the tools I'm used to. Amazon Affiliate links to recommended tools: Fuel Pressure Gauge, Compucheck 0-300 psi: amzn.to/3YeBldu Airlift Cooling System Vacuum Filling System: amzn.to/3D9AlPu Radiator Pressure Tester Kit: amzn.to/3QGBumn Milwaukee 3/8" Right Angle Impact Wrench: amzn.to/3D2CvAk Adjustable Height Parts Tray 100 lbs: amzn.to/3CBusZB Engine Oil and Fuel Dye UV: amzn.to/3z34zkv UV Professional Grade Light: amzn.to/3gzxPc0 Allstar Oil Pressure Priming Tank: amzn.to/3L5pASm

[@joep1278]

I recently took a 3116 MUI fuel system class, we did all of these adjustments (luckily we weren’t missing tooling). But afterwards the instructor showed us how to fine tune the synchronization even further with the engine running, utilizing a temp gun on the manifold and slightly tweaking the sync screws balancing the temperatures. Slightly tweaking the screws with it running is kind of an interesting challenge. Anyway I thought it was a great class as I had no experience on these.

[@ElkoCowboy888]

Don't you just Love it when you work with People who call themselves Professionals can't seem to keep all the tools with the Kit. Knowing someone else will need to use it someday.

[@freeride202]

Every time I heard a truck with a 3116 idling it sounded like crap. This would be why. There would have been a lot of people just swapping out injectors without refinishing the seat or setting the injector rack measurement. It was rare to hear one run this smooth. Good job, this was a great video!

[@robiecarmichael9958]

I only thought my wife was complicated🤣. Years and years ago, at Ryder I worked on Detroits and Cummins. This has got to be the most convoluted over head procedure ever. Thanks for the video. Good job

[@dougbaer5752]

I used to do these at least once a week. The more you do them, the easier it gets. Even though they're synched the same, you sometimes have to fine tune them while they're running for smoother operation. MRC makes a great tool group that makes it a lot easier than the CAT Group. Fun times 😅 👍.

[@michaelreynolds1892]

Same with the old 8.2 Detroit, set them all with the dial guage then sometimes you had to "cadalac" one or two.

[@thecarreraclan7280]

I’ve never used the two indicator setup. We had the the block setup. It always seemed like there was misfire and it would be #1 what you set them to. So I just started doing them by ear and they always ran better.

[@battleaxefabandmachine]

I turned a height tool on the lathe for the injector height. Basically, it's a flag style like a Detroit.

[@hddm3]

Sounds so good. Nothing sounds like a cat. Awsome!

[@SeanFillner]

Thanks! Now I know how my Stewart and Stevenson LMTV engine works! I've only ever adjusted the valves but now it all makes sense seeing you do the procedure...

[@ironnerd8336]

Completely crazy system, but logical when explained well.

[@jasher452x]

Was well versed on 3116 rack adjustments from my time in uniform with these in the early FMTV trucks. IMO these were a pain in the back side, I wish it was easy like the 8V Detroit engines.

[@oldcatmech]

Showing how to improvise for not having the right tooling, you made it through it! good job. When you do another one with the correct tooling, would love to see you post it.

[@meagain449]

This engine stopped working on us in the middle of the road like 5 months ago haha luckily my dad has a friend that knows how to calibrate the injectors and put the engine on time💪he always uses home made tools

[@lukasgrincevicius5027]

Electronic injection is so much nicer to work on. There's sensors already installed everywhere where you'd need them, instead of hooking up gauges manually, they're all acessible through a scan tool and if you need more details, like cylinder or injector contribution - just backprobe CKP or rail pressure sensor respectively with an oscilloscope...

[@jessemaier8681]

Great job on the video, wish it was available 30 years ago. Had a bunch of 3126's with this MUI setup. Cool thing is they did 475 horsepower at 2950-3000 rpm. Many times I encountered people struggle with this procedure and sadly they dealt with the complicated instructions and lack of tooling by pulling the engine and swapping it with a ready spare... serious! US Government at its best! Great job again!

[@johnpad4778]

Great job making the tooling work. I have worked on many of these yrs ago. I do remember that job being tedious. Haven't touched one for yrs now & hope not to again 😅. Great job.

[@dieseldork6]

Ah the yellow, reversed, 4-stroke, backwards Detroitish fuel system haha! While at Cat I was surprised as I actually got pretty decent working on these, however we also had the same exact BS going on in the tool room. That used to make me furious. I sure hope they didn't give you any crap over meeting the SRT on that job Matt ☠️☠️☠️ Thank you for sharing a great video on a complicated job 👍

[@dflood316]

Thanks for putting this together. It is helpful for us ex military FMTV/LMTV owners.

[@donerickson7869]

Thanks Josh i contacted you a while back when i was having starting issues which turned out to be injectors i wound up buying. All the tool kits. My cat kit was the old one with just one dial indacator and i did mine outside in the snow mine didnt sound as nice as yours on start up the first try. One looses paitence when working in the cold trying to finnish before the sun goes down

[@ciwhamc]

Thanks for a good video on the adjustment. I have a 3116 in my 95 m1078 army truck its good to see how its done. At some point in the future I am going to get the fuel governor from the 290 hp and the turbo and adjust my injectors accordingly. Thanks so much. When I had my cam out I adjusted injector height with a dial caliper and it was a royal pain but it worked out well.

[@Veikra]

That`s so much easier than I thought ! Thanks for sharing

[@christophermcnally8782]

incrediblly smooth wow

[@TonyLasagna]

New adept ape is a good night.

[@scrotiemcboogerballs1981]

Always a great video thanks for sharing

[@ricksanchez7459]

Nice job, that thing just purrrrrred when you were done.

[@oldcatmech]

Josh , glad you did not have to show what it takes to do the governor rebuild on these engines, that is a whole problem in it's self! Talk about tooling.

[@1waukesha]

Jeesh, what a pain in the neck! Looks like it runs nice though.

[@rickcoleman8903]

Sounds like a winner.

[@douglasmayherjr.5733]

Great Video, Josh. That’s the bad part about shop tools, they get treated like trash, most of the time. Sounds good when it’s done.

[@bearbait2221]

Luv your vids. Thanks so much for teaching and showing shop time. And taking the time to make these vids. Always great!!!! to watch I'm more of a heavy equipment guy but they have engines to that's why I'm here. A good mechanic is always learning and is not afraid to ask for advice. ur my HEROOOO :0 2 thumbs up from Alaska

[@MrCrabbing]

Sounded sweet at the end there

[@earlearl8850]

Incredible

[@raycollington4310]

This engine looks it was designed by a comedian to me. A right dog's breakfast. I've never phased and calibrated and fuel pump inside the valve cover. Surely Cat didn't design this debacle. Thanks Josh

[@hddm3]

Damn that is cool. Love it

[@maulboard]

Hey Josh ,just a quick story, the outfit i was working for bought a chip spreader just like the one your working on, first season with it it always smoke black when throttling up or pulling a grade hooked to a truck,we called dealer in Pocatello and they said run it, i hooked to a truck one day on a steep adverse and throttled up to 2k and it went ballistic dont know how many Rs it went to but i had an oil distributor in front of me and pulling a loaded 14 yds truck , the distributor seen me coming and got out of my way, and with the johndeere running gear with good big brakes i got it stalled and had truck behind me set his brakes pulled rubber boot off air cleaner and got my lunch pale on it and it finally shut down , oh i had shut fuel shut down switch off to, called Cat out of Kalispell Mt , i helped mechanic pull it ,only took a couple hours and he took it too their shop, 3 weeks later we got it back and they said they couldn't find any damage or wrong. Ran great after that with no black smoke, ended up being a warranty cuss fight with dealer , cat and contractor ended up footing the bill, it was kinda wild sitting on there for few seconds

[@maulboard]

Also josh it was a 3116

[@wagon9082]

Good video

[@mikemorse8592]

You often hear from people that the old mechanical diesels are easier to work on. I’ve always thought this was misguided. The more control a computer has to adjust timing quantity of fuel or any other part of injection, it makes for that much less mechanical fidely bits. Show a novice this procedure then show them changing an injector on most any common rail. A fuel connector a bolt an a electrical connector and it’s done

[@GavinY]

I'm thinking injectors should come with offset specs to really balance them out. Like most modern electronic injectors need to be coded which contains the offset information for that injector. Also most ECU can do their own learning and correct injection for every single injector

[@jasonmorris2813]

Awesome

[@marilynallen644]

Looks like the old Detroit injector but a lot harder to adjust.

[@Charger1908]

Man I can’t count the number of times I’ve had to alter, adapt or build a tool to do a job mostly because I’m a one man show. As far as the missing tools go I’d look at someone who just left or is getting ready to. I imagine that tool is several thousand dollars and to start your own business it would be nice to have. Anyways as usual I loved the video.

[@paulchoiniere7322]

Ever heard of a 3116 tool from MRC carpenter tool set? I use one at the cat dealership I worked at. You don’t remove any rocker arms or anything.

[@John-gj9db]

Man….I used to work for Cat here in NZ. There was only one guy who could work on those fuel systems. Everyone else would quickly disappear when one cam in the shop. And yes….the tooling was always missing vital components 😅

[@andybonneau9209]

Why don't the specialty tooling not get checked out, and back in, through the parts department or shop foreman?

[@OpaqueWindow]

Same reason all other shops. The guy who used it last won't own up to his mistake.

[@guillermosaavedra2967]

Because there’s a million specialty tools at dealerships and they just get put them in lockers and forget about them

[@prevost8686]

Because most dealerships are a revolving door for people coming and going. Few employees stay long term and special tools seem to disappear in the confusion.

[@fastinradfordable]

Sure just add some more work for them What do they care😂😂😂

[@cefb8923]

​@@fastinradfordable Aren't the delays and now sourcing the tools again more work then just having a sign in/out sheet?

[@richpolo9002]

Old Detroit was a lot simpler, did lots of 53 and 71 in the day

[@nhzxboi]

This reminds me of the 8.2 penny pincher, externally lubricated V8 Detroit.

[@martybeaudry5747]

nice

[@pietervos2553]

I did this job one time before. It is very complicated. On Detroit engines or on cat 3500 engines this is much easier

[@markB40]

Looks like a complicated system with the dial indicators, adjusting GM 2 stroke’s much more simpler.

[@timkis64]

sometimes i wonder if american companies take a cource at the mercedes benz school of "overcomplication of simple tasks".the germans could make turning a doorknob into a 274 page long 187 step process.

[@servicesmecaniquev.laverdu1726]

I demand full fuel ajustement right now 😂

[@shadrackmutai9717]

Thanks for your educative videos. My question is, when pining engine,transmission gears should be in neutral or park?

[@guyconnell2250]

What a PITA. What could possibly go wrong, LOL?

[@peteengard9966]

The Detroit pins are cheaper and work better than those things. I used to keep two fingers on the rack/governor pin and make sure it didn't tighten when adjusting the rack/racks.

[@larryskeeper1197]

Right on..

[@coachgeo]

mucho graciass. What kits..... would have a base and dial indicator usable as a second one for rack adjusting? I have the old school full kit you were missing. But having back up system with less parts to do the job would be awesome. Not having to buy a whole nother large kit to just get an indicator and base would be foolish too, if another kit with less stuff involved thus less costly would have that as part of it.. Oh and your missing one... that has the proper fork in it right? (it is not in front of me to look)

[@minnesotatomcat]

What a headache just to get a gutless boat anchor to run right. It’s a nice sized motor displacement wise, too bad they couldn’t have simplified that fuel system and gave it some more power.

[@dylanc9275]

Who better to ask than the man himself. I have a 3116 with 15,000hrs on it on a 928g loader. Runs like a top, but leaks like a siv. Is it worth just fixing leaks or the other option is pulling and getting cat to install a rebuild kit.

[@deanmckee1385]

And I thought the 8.2 Detroit sucked, that look even more difficult

[@Stickmantree]

Ape I have a 3116 & just had the injectors replaced but We’re having hard starts regardless of the weather. Any ideas on what may be happening?

[@dave0z96]

I’m working on an old 3116 powered generator . It idles high . If I turn the idle adjustment screw down the engine will shut down slowly . I can get get it to idle without shutting down but it idles at 1300 rpm . Would adjusting the overhead solve this or do you think it’s a problem in the fuel pump .

[@leeriver857]

Pity cat didn’t just follow or use Detriot diesel two stroke injection system 🤔

[@ardenbowman4489]

HI,WATCHED A FEW OF YOUR VIDEOS,IS THAT NOT SIMILAR TO THE 8V DETROITS,71 AND 92,I KINDA SET NO1 AT FULL THROTTLE AND THEN FELT THE OTHERS WITH MY FINGER,NOT CRITICISING JUST LEARNING,THANKS

[@nou8257]

So I think my 3116 is just gonna go till it blows or gets replaced first by something else cus screw this stuff leave it to cat to find a more complicated way to make fuel squirt to explode

[@prevost8686]

Those responsible for designing the fuel system on that engine could have done a better job.

[@jeffreyyoung8727]

Stay in spec .no one complains

[@cbmech2563]

Good grief, and I thought a v16 71 was a pain in the rear. My first exposure to Detroit was a v16 71 running a gen set. The contractor had 2 in a trailer that needed a tune up .I was an operating engineer apprentice mechanic and the journeyman that was doing the job put me on one and he did the other (he spent more time watching and helping me than it took him to do his). I was good at Detroit tune-ups but I never liked the engine

[@larryskeeper1197]

Went well in Terex trucks

[@BigJfan]

Why not rezero the indicator after adjusting the first injector? Then you wouldn't have to remember the target number. It would just be zero.

[@joep1278]

Mounting variations as you move the tooling would have it off. When you move to the next injector you have to reset the indicator at zero again as it never quite matches up again, just due to mounting differences

[@duncandmcgrath6290]

I was thinking the same thing. The baseline is there , just zero out and get your spec.

[@mattdeckert6150]

3116 is probably (in my opinion) the WORST to adjust. And if they are misadjusted they tend to smoke like crazy at start up. Been a cat wrench since 93 and i still hate 3116s.

[@larrytomb3896]

See you never adjusted a 2 stroke Detroit

[@deanmckee1385]

Wow don't know what else to say

[@liamrobertson7265]

first

[@williamhague2768]

I’ve got the kits. I, wanted to compare my system with yours but…. With all the make it work stuff your doing, makes this another confusion rather than a help. I’m glad you made it work but.. it won’t help me.

[@thetowndrunk988]

Someone needs a backhand for misplacing the tools.

[@bulkchart3239]

hate it when a tool grows legs.

[@vtx2005retro]

Come on man it isn’t that bad. The key is to use new parts.

[@peterpower0495]

Note to self do not buy/work on a 3116 lol

[@liamrobertson7265]

first