Chevy C70 with 6v53 Diesel Sitting 30 Years - Will It Run... Away? - NNKH

[@Tonyclifton-q4f]

sometimes i get a bit sad,i dont know why i have nothing to complain about BUT sometimes i find myself in a hole and watching this fella work out how to get trucks cars motorbikes farm machinery going always gets my mind in a better place ,thankyou

[@Jayymes]

it's ok to feel sad over nothing! shouldn't feel bad feeling that way even if you have nothing to complain about, glad these videos cheer you up tho

[@boromirofmiddleearth557]

I totally understand you Pete! This guy is amazing positive can do attitudes!

[@Straight0uttaCrofton]

same

[@robjustlooking8729]

The reason your fuel went down so fast is because it's constantly pumping fuel through the injectors and back to the tank through the return line. Most of your fuel was going back into the old tank on the truck. Drove a Chevy just like that, same cab and engine, except it was a tandem dump and had the five and four-speed transmission setup like that International.

[@Project_Low_Expectations]

Always loved the way these sound running down the road, the exhaust tone is just bad ass.

[@qdogccfc8258]

Indeed I heard an old Mack tow truck go by about 2 years ago at work while taking out the trash I heard something accelerating and didn’t know what it was until I saw it And Boy was it screaming

[@rock.doctor]

Now you see why the Detroit Diesels (Screaming Jimmies) have such a strong following. They were very popular for generators engines because you didn't have to run a block heater constantly. They could be cold, go from off to full throttle and stay there with no problems. It actually has a very interesting history. It was designed in 1936 by Winston Motor Cars and they tried to sell it to the US navy. Because you could run them wide open all day long (and the military don't care about fuel economy) the Navy bought them. Winston spun the engine off to a new subdivision of Winston called Cleveland Diesel and they started building engines for the military. Problem was, like willys, they were too small of a company to build enough so the Gov gave it to GM to build. GM gobbled up Cleveland Diesel and it became detroit diesel. Funny thing about the gov, you sign a contract for the military, you build the product but you also give them the rights to that product and design. This is how the jeep was moved from willys to Ford, and how the DD was moved from Cleveland Diesel to GM. There were a lot of machinations that took place for all of this to pan out but i kept it simple. Another interesting tidbit...with a kit you could make the DD tier 2 emissions legal. (Tier 2 is EGR... 1- cat, 2- cat/egr, 3- cat/egr/dpf, 4- cat/egr/dpf/scr (although, in many cases the scr is efficient enough to dump the egr system))

[@richardthomas1743]

Thanks for the History on them rock doctor.

[@collinpearce5877]

very interesting I’ll never forget this

[@gunshipproduct2]

Cool story, but when GM purchased Winton Motor Carriage Company in 1930, they changed the name to Winton Engine Corporation. The design of the Two-stroke 71 series wasn't yet around then, It wasn't until later that it was designed by a group of GM engineers.

[@ryanwiese5280]

Real facts. 👍

[@CharredSteak]

Interesting that you mention emissions controls, obviously 2 strokes are awful in the efficiency and PM department, but i'd imagine they'd produce far less NOx as a side effect. would be curious if someone actually took some measurements

[@bryanewing5058]

Dude! I love how you went back to the truck after you learned about the emergency shut off. Very entertaining. 👍🏼👍🏼

[@MadMedeiros]

I don’t even think bias plies has ever revved an engine that hard that cold, and it still runs like a champ… wow

[@thegman4759]

Considering this guy is in a nice warm climate I highly doubt it I've seen peg leg redline at like -35 Celsius

[@MadMedeiros]

@@thegman4759 I’ve seen snow in his videos so I’m assuming his not in the Deep South, he visited adam camarata recently so I bet he’s in New York ish state

[@danieljimenez1036]

@@MadMedeiros hes canadian i think

[@bobsmith2637]

@@MadMedeiros Peg lives in the bush south of Grande Prairie, Alberta. Really out there.

[@airplanemaniacgaming7877]

@@bobsmith2637 First video of his I watched, given by the swearin', the beer, the Western' Drawl Twang in his voice, I went "Huh, he's a Canadian! Must be from out West, probably Alberta since he said they're drillin' oil practically in his fuckin backyard!"

[@BMC1100]

My late father had a truck here in Australia with a V6-53, it was a great unit to drive, I spotted straight away that you had tripped the shut off, glad you went back to it. The V6-53 was really sweet when hooked to a 10 speed RoadRanger gearbox. They are a real ball to drive.

[@cafelisto01]

An engine worth saving. I heard them back in the late 70's and early 80's on Blue Bird buses in my childhood years back in El Salvador. Great memories, those engines are music to my ears.

[@KUPHAN0812]

You my friend are a true motor whisperer 😮

[@grahamwillox]

When I first started this old engineer said to me… you don’t know anything until you learn about it. Stuck with me my whole life. Learn something new everyday and you’ll be rich in knowledge all your days. Loving your content btw. 👍

[@richardthomas1743]

Hell yeah! That was really interesting! I can't get over the C70 how quick it started. I love the sound of the Detroit Diesel engines. I am really happy that you ended up going full circle back to the C70. I hope that you end up with the Engine Chris. Thanks for taking us along and thumbs UP to you! I am already looking forward to your next video!

[@NoNonsenseKnowHow]

Thanks for checking the video out Richard! And yes I gave him a deposit on the engine and transmission. So hopefully more to come on it in the future when I find something Worthy of putting it in

[@richardthomas1743]

@@NoNonsenseKnowHow Wow Chris! That is awesome news! I have no doubt that you will come up with something awesome. I hope that you and Jen have a great weekend.

[@vincent570]

@@NoNonsenseKnowHow Nice

[@justinraystyles3537]

it came to life because it wanted to be saved!!#😢

[@glenncrockett4451]

@@NoNonsenseKnowHow That's great the hear. I loved the sound of the farm truck. I think it would be cool in a modern chassis with like a 50's utility wagon body on it lol

[@wes11bravo]

Love the 6V53 - it powered the M113A3 I drove back in my early Mech Infantry days. Screamin' powerplant.

[@novanut1964]

great video, i lived in a 1952 gm bus motirhome conversion, i started the diesel engine every few weeks, it took off one time i about had a heart attack, i finally took a ten bolt plate off and used a rag to shut the air off, very scarey.

[@Michael-to7oz]

I use to drive a GMC General with a 6V92 and another with a 8V92. So much fun , sounds like your doing 200 mph. I also had a 97' 379 peterbilt with a series 60 Detroit diesel 500 HP, my friends had Cats and Cummins and would make fun of my Detroit but I got way better fuel mileage and while I couldn't out pull them I could definitely keep up.

[@davidtoups4684]

When I was a kid there was a local company that delivered heating oil with a fleet of 6v53 C70 tanker trucks. I remember hearing those things screaming up the hill in our neigborhood. Scared the heck out of me back then, but I love that sound now!

[@robertrojas4319]

You are truly a mechanic. Not a new part switcher but a true mechanic. This country needs more mechanic and less PADS. Plus You love dachshund what's not to love Chris.

[@jefferybye2169]

I had a smile on my face the whole time you were driving around..brought back alot of childhood memories..thanks Chris

[@JorgeDiaz-ly5qp]

Ditto! I hope you end up with that mill! ANY engine that is willing to start and run deserves another chance. Great video - you are the King of Pacing!!!

[@divineoracle4809]

Such a cool truck. If only it was in a little better shape, it could definitely be repurposed as something. I think it would make a really cool RV conversion, it would take a lot of money but imagine the way it would turn out.

[@martinnightingale6033]

I do love the sound of a Detroit Diesel . I own a uk spec Jeep Liberty 2.8 crd . The engine is / was built in Italy by a subsidiary of Detroit Diesel .

[@NoNonsenseKnowHow]

0:00 Intro / Tour 05:19 Under Hood / Stuff 08:36 1st Crank / Fuel 11:35 Sponsor 12:38 1st Start / Why 16:46 2nd Start / No Start 18:35 Next Day / Check Racks 22:35 Gus 24:12 Another 6v53 Truck 30:33 Example of a Stuck Rack 31:57 Revisit C70 Suzy Stuff In This Video: *POWER PROBE 3: amzn.to/3M5xpFp *RETRACTABLE TEST LEADS: amzn.to/39cJauY ~DetroitGarage: kzbin.info/door/tdyEUdVqQx3XN47FW_UzeA ~Merch and More NNKH @ linktr.ee/NoNonsenseKnowHow

[@keepontruckinoutlawlife1248]

AWESOME job do you happen to know anything about the mack E7 engines? I'm in desperate need of HELP. Thanks

[@larrycroft470]

Dude your skill set is amazing. You are one of those people who just will not be defeated. That man should sell you that engine for cheap since YOU are the one who got it running.

[@rgs4x]

I drove a fire department rescue with that engine. There is no mistaking that sound. I loved that rig.

[@chris-thumper7205]

You can smell the video when you opened that drivers door. Brings back so many memories.

[@thelaidbackguy1922]

Great video,thought that thing was gonna implode in the beginning.well atleast if there were any living creatures in the engine or engine compartment,they were rocketed to the moon....lol

[@Rick-4552]

Those old Detroits were the reason my dad couldnt hear , but he syre loved them

[@bobweidlein8349]

This was so much fun to watch. I would love to see a vintage diesel motorhome.

[@pimol]

Best regards from Poland. Perfect idea for the best KZbin series pushing you to see more and more. Wish myself you will continues even more working eaquely with forgotten cars tnd trucks like this. Best enrertainment for anyone who enjoy automotive even in smallest part. waiting for the next... Radoslaw

[@indianachrisUDX1313]

Chris! I am hooked on watching your videos! So Far my favorite is the Fury Wagon and will go back & Watch again. In 1979 (long ago) I bought a 67 Belvedere 2 Door, with the 318 for $100. Got it going and did some floor board repairs and added new carpet. Then I sold it. Wish I would have kept it...

[@stephenhuber1079]

Really awesome to see those old engines run! Great episode!

[@ezrhino1803]

Chris I looked up the word persistence in the dictionary and your picture was there. Out of curiosity i looked up the word crazy wild man and your picture was there too……just sayin…..lol . Another great video brother

[@helenrob2961]

LOL the moment you left the valve covers on and never checked for stuck injectors i knew it would run away keep up the great entertainment.

[@discoverlight]

12:56 holyyy smokesss ! 😂 she’s alive for sure!

[@davidgwin4540]

You gave that 2 stroke diesel the beans my brotha! It sounded very healthy and it rapped out like an actual 2 stroke ATC 250R! Kind of any way. I'm very interested to see what happens to the old hauler! Honestly, I hope it is going to be saved and put back to work🙏🇺🇸

[@DieselRamcharger]

lol thats the blower you hear mostly.. but the rpm sounds 2x as fast as it really is {because 2 stroke}

[@Wingnut353]

@@DieselRamcharger Well the blower an.. well everything about a detroit that is loud... even my little 353 is loud as heck.

[@ChannelNotFound]

My schoolbus was one these in elementary. Sadly they got replaced with new ones in '06. That engine starting up gave me a flashback.

[@joshuaprince898]

Hey man, Great Video! I absolutely LOVE Detroit Diesels! I drove a fire engine with a 6V92T in it for years and that thang ran like a scalded ape! I sure hope you're able to acquire the motor and reinstall it in a project of your own! I really enjoyed the tidbit at the end with the Loadstar too, that smile on your face was priceless!

[@txvet8474]

Another Great Video...I really liked your smile while you were driving the farm truck. Keep up the great job and I'll keep watching..:-)

[@171apples171]

Lol that towing was gold. I flat towed 2 IH Loadstar 1600 grain trucks a good 40 miles w/ a home made tow bar and a duramax. I steered the grain truck and the duramax was pulling/brakes lol. Man id do about anything for an old 2 stroke Detroit. I want a 471 or a 6VXX really bad.

[@dajuice8228]

Dude, this is never boring. Keep it up man I love it.

[@johnelliott7375]

I am going on a memory lane trip, watching you and I hope that you are able to get it running. I wish I could get a motor like that also that run.

[@americanrepair]

29:25 Nailed it! I was yelling at my computer screen.

[@claztube]

Oh Chriswhen you were shooting the Last Mile for that C70 Moving Truck and you can hear those tires screeching, even attempting on that hard right, softened by going wide, Suzy tried to turn away from her dismal end.... The pang in my 💔 was heavy and it didn't help when you gave her a name.... that nearly brought them salty secretions flowing. Good Bye Suzy

[@captainwhiplash]

On a Detroit the rack is in the full throttle position when not running then the governor idles it when it starts. Put a pair of vise grips on the rack tube in idle position then fire it. There usually is an emergency shutdown flap over the intake and the blower shaft sometimes will round off but you can pull the blower shaft out and put it in backwards temporarily and it’ll run fine. Happened to me on shrimp boats many many times

[@SteveB-68]

Still going through your older videos. Very cool stuff.

[@texjake3]

Wow! I love the way that the International sounded!!

[@katiejameson]

That is so badass!! I love the old 2 stroke Detroits, wish I could have a rat rod truck with a 6v53 in her

[@CPthetooladdict]

Gus is so cool love your new little pup!

[@donstone4349]

Probably could winch with a snatch block or two.Love that truck,glad I’m not there I’m a sucker for old iron.Wish it could tell it’s story.God bless you on your journey

[@ShawnCalay]

Back in the early 2000s i worked for a shortline railway in New Illinois and a farmer part time....he had a C70 as a tractor and i used it often hauling grain .....was a die hard truck stacked upto anything new at the time.

[@kennethparent8544]

Hey Chris this brings back so many memories of my dad he drove a truck like that straight job that's what they called a box truck like that he worked for a moving co called Anderson Benson and he worked for another moving co called JJ sullivan they were a division of Mayflower mover's he did that from 1949 until 1973 he told so many interesting stories of those days moving people those trucks were used for piano moving my dad used to work a lot in New York City and he would tell me about the days of having to lower pianos from third floor apartments using block and tackle and they would load the pianos into a truck just like that they were called piano vans I thought I would share that with hope you find that interesting because these videos are so very interesting keep up the good work Chris I love these videos

[@joshb124]

Loved this series. Been there done that once with the shutoff valve!

[@michaelguinn5736]

My Dad worked for GM Truck in Pontiac Michigan, I remember those 70 series trucks brand new...

[@jjjj-uf4bw]

Glad to see you got the motor to run. I hope the owner just lets you keep the motor for your effort since he was just going to cut it up for scrap. Maybe you can work out a deal to help him dispose of the truck's body and frame and keep the motor for free or maybe flip the owner $100.

[@matthutch4216]

That thing sounds so good just idling.

[@timothyjohnson6258]

Just in case you didn't know, you can buy a water-sensing paste that you can put on a piece of steel rod or a tape measure and stick into a fuel tank and it will tell you exactly how much water is in a fuel tank. It is like a crayon, only a bit softer, and you just smear a little onto the end of a tape measure and stick it into the fuel tank and the water will turn it red. The paste is usually yellow, don't know if there are other colors. That could save you from having to crawl under and pull a plug or open a petcock to see if there is water.

[@russveith7871]

I think the reason it wouldn’t run was you released the intake trap door in front of the blower. You have to reset the latch and it would likely run. Update, I Just saw you eventually figured it out on the International, the 53 series engines are very simple.

[@JacksonGuitarsPlayer03]

SCREAMIN DETROIT! I gotta find me one!! I got a bunch of CATs and one ole 290 Cummins in my old single axle international paystar dump truck runs pretty damn good! That truck is sick nothing like oldschool Looks, power plants, noise, mechanics you name it

[@isfeldt34]

The Detroit 53 series two cycle diesel was introduced in 1957. Although the engine used a roots type blower like its larger 71 series counterpart, it's classified as a naturally aspirated engine. Rather than being used strictly for performance reasons, the blower's purpose was to facilitate scavenging in the cylinder during the exhaust stroke. A turbocharged version of the engine, which still utilized a blower for scavenging, was offered beginning in 1977. "53" refers to the fact that, regardless of total engine displacement, each cylinder displaces 53 cubic inches.All 53 series diesels, regardless of displacement, feature a 3.875 inch bore and 4.50 inch stroke. It was offered in 3 cylinder, 4 cylinder, 6 cylinder, 8 cylinder and 12 cylinder configurations. The 8 cylinder version was primarily used in marine applications, although it was much less popular than the marine 8V-71. The 12 cylinder version is extremely rare and was reportedly only produced for 1965 to 1968 model years; it is rumored that under 25 of these engines were placed into service. This likely because the larger 12V-71 was more apt for applications that required an engine in this horsepower range and could manage the spacial restraints of a long, 12 cylinder engine. The 12v-53 produced just over 400 horsepower, where as the 12 cylinder 71 series produced a minimum 450 horsepower and up to 900 horsepower. The "silver 53" series was introduced in 1984. Modifications to the engine family promised better fuel economy, quieter operation, and more horsepower across the board.

[@jasonspringett5367]

Allways get excited when I see a new video from nnkh!!!! Thank you for all ur hard work, I love your content!!

[@KarinaTheDreama]

That was AWSOME! How much fun was that ? I was hollering YAAAAA! It is a NoiseMaker! I’m so jealous!

[@takuacheperformance4740]

Really really enjoyed this video!!! You did us all well! That red dump truck would be perfect for me!

[@stevereinhart4067]

Detroit 2 strokes are some of the best sounding engines ever made.

[@husqvarna545markii9]

My friend Terry used to own a 1960 International BC-180 Tandem Dump truck with a 20 speed twin stick trans. 345ci Gas V8. The brakes didn't work haha I had a blast riding in it.

[@KnapfordMaster98]

That international is a MONSTER

[@tihspidtherekciltilc5469]

The last time I saw a roll back do a wheelie was when they were trying to transfer the Saudi prince's armored limo that lived near the Exxon I pump jockeyed at from a heavy duty box truck to a roll back that had tandem rears built for construction equipment. Holy mother of God that limo was no joke and actually bent the deck of the International. What a cluster that turned into but it brought a lot of business as they did this in our parking area.

[@Hogger280]

No cap on the fuel tank - you know there is water in it !

[@NoNonsenseKnowHow]

Yeaa

[@Copesthetic-Aesthetic]

Fantastic upload Sir. Another good 2 stroke diesel video "Screaming Jimmy" Deboss Garage, they destroy a 16cyl 2 stroke Detroit It fired right up as well. Way more scary then the little 6cyl.

[@k-dawg3893]

Great video dude! Always enjoy your stuff. Keep 'em coming!

[@seanpoulk5718]

Your videos are great. Don't sweat it, shorter videos with "cliff hangers" are fine. That's how you "keep em comin back for more". If you ever make to Alaska hit me up and we can take my river boat out and kill some salmon. It's kind of like the air boat you have. Its a cobbled together 21' aluminum smoker craft inboard jet with a 2.0 chrysler but it runs like a beast. Sure it leaks but as long as you go forward and keep the pump running its all good. Not really worried about sinking it in rivers that are only a few feet deep, you can always just run it up on a gravel bar or the shore if it starts gettin "nautical". I'm gonna try flex seal and see how that stuff holds up.

[@mikerobbins3334]

How to drive 2 stroke Detroit: Walk up to it like you mean it. Open door and insert hand. Slam door on hand. Proper frame of mind has been achieved.

[@donvanasse3150]

Man, I love your videos, I watch them daily now!

[@petercolquhoun2086]

Really appreciate your persistence. And more puppy!

[@caseymartin7747]

So excited every time these videos pop up

[@michaelolsen2348]

Whooo! That woulda scared the crap outta me! Lol. I did NOT think that would start right away. Hopefully he's getting a decent amount for scrap. I'm sure they'll at least use that motor around the scrap yard. Seems like alot of usable parts on it at least.

[@JohnSmith-kz1ll]

Very cold blooded motors I have a Detroit on my wood chipper it's a 50yr old motor and runs mint

[@joef1006]

🤩ohh glad you did a video on this truck/trucks the supercharged v6 diesel is such a cool old school engine .andd it's cool you now own one hhh

[@rapshock6162]

Seeing the old dump truck, make me think of Maximum Over Drive!! 🤟

[@ericblom9568]

Interesting factoid: While they are both owned by the same company and share interchangeable parts, Brockways are only known/marketed as such for the most part East of the Mississippi, but on the West of ol' Man River, they're known by the more common name of Mack Trucks.

[@garym7771]

I like these old vehicles repairs, I have a few acres of the same. plus some early 20's and 30's ford and Chevy cars.

[@chrisridgeway9790]

2-stroke Detroit Diesel. The most beautiful noise in the world !!

[@hilham89]

That international sounds amazing. If I had the room I would have loved to have that. Thank you for taking it for a drive.

[@jayfromtexas6718]

Great video bud! Amazing how you breathe life into that stuff.

[@RayScrafield]

Very cool. That thing runs so sweet, it would be a shame to just scrap it. There must be a place for old Jimmy's.

[@alexplus3]

PA Crew check in ✔️💥

[@Vickyvee97]

Sorry for giving you a hard time with my comment on the oil bath from the U-Haul truck video. I keep forgetting that type of system isn't seen these days. I do enjoy your videos and keep up the good work!

[@smkyka]

"Brass gas cap, you don't see those anymore." The 26 foot U-HAUL trucks (both the GMC and FORD) versions utilize a brass gas cap lol They're still relevant and sometimes annoying to get haha

[@gaspersautomotiverestorati7395]

I think you may have tripped the emergency stop on that 6v53 between when it was running and not running. It shuts off the air in case of a runaway. Hopefully someone at the scrap yard saved that engine. They are getting hard to find. They use them in a lot of antique fire engines. Nice video, than you for doing them!

[@NoNonsenseKnowHow]

Yeah that's exactly what happened! Figured it out toward the end of the video. And I ended up keeping this engine. I think it was the forklift video I did where I showed getting it for a little bit of work I did

[@rp1645]

Thank you for your hard work, simple try to start a Detroit. Myself have a 8-71 & a 353. both of them I have too manually RESET the Air Emergency shut off. The 8-71 has a button on dash ( solenoid on engine) the 353 has a long cable down to shut off. On the 871 have to watch kids carefully when they get in cab. Kids want to push/ pull all the switches. I covered the shut off with a rubber cover. My 871 has a pull out nob for stopping. on the dash, next to manual Throttle. On my 353 when I got her, the previous owner just had ONE battery. The battery cables got really HOT. I use 2 battery's. just saying what I have found on both my Detroit's. ONE battery gets really HOT ( cables) when starting.

[@markduncan6690]

Chris knows how to make battery compartments fit!

[@jasonpetrich4141]

I knew it would run!!! its actually really clean in there. If the hood is not open most the time it sits its relatively dry and unharmed. I would pull the drive train and keep it, And then pull the box off of it and make a nice little dry workshop its perfect for that

[@donaldhalls2189]

They run away if you fill them with gasoline, petrol in Australia, he had to put it in gear 4 th and drop the clutch with the bake on hard 😅 brought to us next day found he filled diesel with petrol, gasoline, luckily he stopped it quick enough, all the best to yous and your loved ones

[@HookedUpCatfishing]

These old Detroit engines sound amazing I'd love to swap one into my old f250

[@jedk9523]

if you do it use a f350 frame

[@mattlevault5140]

Good vid. Never been much of a diesel guy but always learn something from your content. Keep up the good work!

[@ClassicTVMan1981X]

Some of the 1978-80 Bruin 70s also had the 6V-53, whether with this classic butterfly hood or with the fiberglass one.

[@louk231]

I wonder how many miles that old rig traveled? It was a good runner. Shame it outlived it's usefulness. I hope you do buy the engine.....Great fun watching you breath life in to these forgotten old rigs.

[@robertviejo9048]

omg those old trucks are bullet proof....ford chevy dodge all amazing back in the day!!! Great vid thanks!!!

[@kb5335]

those racks were stuck when you fired it up the first time bc they hadn't seen oil for 30 years. once you started it and it ran away it pushed a ton of oil up there and gave them a bath. then you came back and took a look at them and they are unseized due to simply having gotten oil again. it def was running away. the injectors only get what fuel the racks give them so even if you have a stuck injector they wont have more fuel than what is provided. cool engine i hate seeing these Detroit engines go to waste. i had an 84 ford f250 4x4 with a detroit 453 t in it and 5" miter cut stacks. it was a screamer! im glad you didnt just give up after that first start up! i havent finished the vid yet when writting this so im hope you cut the mufflers off and really let it sing! haha

[@Masterkill45588]

They're amazing old engines and the sound of them in by far my favorite

[@craig4557]

That was awesome! Definitely want to see that airboat on the river.

[@NoNonsenseKnowHow]

Hopefully getting to the Airboat part 3 very soon! I'm stoked. Can't wait to get her on the water

[@kman-mi7su]

That's impressive, that old workhorse fired right up first try. And it didn't even smoke the place out either. I used to drive a 1978 White Road Boss with a two stroke Detroit in it as a yard dog 30 years ago. Those motors have to be revved high to get the power out of them unlike the typical four stroke diesel like Cats, Cummins, Macks, and others. Those motors will wreak havoc on your hearing.