Kenworth "Mullet" Truck has a Rough Idle, but Why? 

Horn doesn't work... sticks head out window and yells "Honk!"😂

When the horn doesn't work you gotta yell "CLEAR PROP"

Finally! Somebody who knows how to edit videos! Your content is to the point well explained without dragging it out. Thank you!

I want to say they labeled it a 3412 instead of 3406. Every Tech should put together a simple pressure test kit for fuel, oil, trans pressure readings is vital for any troubleshooting, diagnosis.

Wrong engine label. That’s funny. Nice job again. Thank you for being “the RU-vid’s” CAT authority. I’ve learned a lot from watching you. Also you have commented before about having a larger family… that means you wear a lot of hats no doubt. Sounded like your young ones were in the background while you recorded the voiceover. Didn’t phase you a bit. Good job dad!

On my 3126B I've found a lot of components I've replaced have had updated part numbers and are vastly different from the old parts I took off. In every case when I've done that, it's fixed the problem and I can see where the changes they made were improvements. The oil pump and oil filter housing are two examples. It's part of why I don't mind spending the money at the Cat dealer to get the latest and greatest. And that "3412" is missing 6 cylinders :)

God I'd want this rig just to drive it. It's so clean.

7:11 Cylinder liner was like “Aight ima head out”

Had 10 trucks used for heavy haul with C12s. They all needed cylinder packs around 350,000 miles. Cat changed something in the computer and some went to a million miles after that. The biggest issue we had was leaking front structures. The steel plate to block behind the front motor mount would leak. Those were traded in for C15 powered tractors.

Thanks for watching the video and hopefully you liked it. Very nice truck. If you wanted to check out the Air Jack click the link: s.vevor.com/bfQnmo Buy 2 or more Air Jacks Save 10% off with code [ VV10% ] 5% site-wide discount with code [ VVSALE5 ] Product Link: US air jack - s.vevor.com/bfQl57 CA air jack - s.vevor.com/bfQl5T UK air jack - s.vevor.com/bfQl5J EU air jack - s.vevor.com/bfQl5G Tag #vevor #airjack #floorjack

44 degrees on the first day of summer sounds heavenly. I'm over summer already.

That is a really nice HDT RV hauler. Hope he does not have more issues. I think they stickered it wrong shouldn't be a 3412. Stay safe and healthy Sir.

I like that bag on your vacuum

Thanks for sharing this one with us, really cool looking truck! Don’t tell me, RU-vid made you take the music off of destruction of the week… what a mess this week was..

Thank You Josh. Very well edited and the whole presentation was very easy to understand and follow. the kinds of incidental items you throw in to add value to the subject and keep it very interesting. I don't do diesels anymore, so it's always fun for me to watch your diagnostic logic and the little tricks of the trade, like the RTV silly cone gel getting hard while eating burgers and pizza. Those air bag jacks look so simple, but I wonder about their reliability. A truck airbag is one thing, but a cheap Chinese knockoff airbag attached to a cheap Chinese metal contraption is a horse of a different color. Keep safety in mind when using new tools and equipment. I look forward to your video every week or when you get one out. Keep up the great work, and keep safety in mind. ben/ michigan retired but not gone

That beeping was driving me insane.

Put a few drops of engine oil on the exhaust manifold for a quick check of coolant in the oil. If it bubbles- coolant. If it lies there and smokes, all good.

Hope he didn't have to pay the 3412 price for that 6 cylinder.

Nice job running that down. Don't like to break out the parts cannon but I would have went for the pump right up front.

I like to check them first also There can be a reason that they are out of adjustment If you just loosen them all off you will miss that. Love the videos keep up the good work

Seen the relief valve stick in the FTP, I always check it. When Cat came out with the new design FTP, did not have the updated line. Had to fabricate a fitting to make it work. Coolant in the oil on these. Replace water pump first, if that don't fix it, replace head gasket. Two styles of head gasket depends on head and block design. I would call Cat and tell them you only got half of your replacement engine.

I'm certainly not going to say you're wrong for this application, but some uses of RTV (which vulcanizes at room temperature) specify a cure time before you tighten to final torque. If you over-tighten before it's cured (or partially cured), you effectively just squeeze it out of the joint. So you *may* get less leaks if you install and tighten to 1/2 way, and then come back after lunch and torque to spec. Again, I've seen that on RTV and other sealants like Honda-Bond... but not claiming to be an expert.

vevor after seeing your video. Holy sh*t can he do that, is that allow in the contract. intense page flipping noises.

That's an interesting 3412 there at the end. Never seen a six cylinder V12 before.

Another great video Anept Ape. Thank you.

Those Jack's are pretty handy, I got one awhile back when u first got it, workd well for lifting axles on low boy to do brakes

Awesome tech video Josh this one was challenging with many opportunities for faults. I am certain the builder of this truck loves his one of a kind RV hauler. I swear when my F450 dies I’m going to build one similar to his build and not have these crazy new pickup truck prices invested in a 5th wheel puller.

I see what's wrong with that engine for smoky red. They misspelled Cummins.

They gave it 6 imaginary cylinders? Should have more horsepower now, just like the neighbor kid with his stickered Honda.😁

A shortcut for paint overspray masking: use aluminum foil to wrap hoses, belts, etc… Easy on and easy off.

CAT forgot to send you the other half of that 3412.

Nice! Excellent video. I gotta say, that sure doesn’t look like no 3412! That reminds me of a time quite a few years back, I got a set of new head bolts for a 3400 Natural gas engine and they came brand new in a sealed container from Cat with no threads cut on them! Lol. The rest of them were 100% good, just missed a step in production I guess.

When you checked the two drips of oil from the drain plug it did look thin

That 3412 valve cover sure looks a good on a 6 cylinder engine!!..😂

While the customer likes suppressors, he does not like to suppress his truck. Jokes aside, quality content AA

If the horn doesn't work, then you have to roll down the window and yell, "HONK HONK!" 🤣👍

if you suspected a coolant leak you should have done the head bolt check for a leaking head gasket, the key way appeared to be sheared on the fuel pump drive gear, any time you have the valve cover off on a c12 you should inspect the cam followers, especially number two cylinder.

I wonder if a second oil sample is in order, what are the possibilities that the pump was losing fuel into the crankcase?

New sticker for your tool box😅

Take the gears off the shafts in the transfer pump, keys or gear should be worn if they have that much movement. Look in side of the gears slot probably enlarged.

Thanks for posting.

With the fuel pump, i had one on a Detroit 60 series that had close to 1/4 turn of slop in it. 😅 replaced it and truck fired right up perfectly

3412? 3406👍

3412 1/2 swap

HUMMM🤔 build your own jack with TWO air bags ! Great fuel issue video. I learn something every time I watch . Thanks

Some of the coolant canisters do have fine screens in them to catch casting sand and other debris in addition to the extender pellets. Some does not mean all obviously.

The oil level issue could be if the engine was cold and the level was checked too soon after it had been running. It sometimes takes an eternity for cold oil to come back to the oil tray in some engines.

Looks like a hot shot truck, open the window and yell clear prop.

I new what RTV was back in 1980s when it came to be it has improved

3412 sticker, hahaha. Well, at least there's half of a 3412 sitting there.

Good fix, I don't like Vevor much but I like the jack, those things can be hideously pricey.

Getcha an air horn to honk when the horn is inoperable

A trip to Midland Michigan (Dow Chemical country) will teach you all about room temp vulcanization. At one point they had a huge display at the airport.

I just got a Vevor 2kw variac for variable AC voltage and I'm waiting on a Vevor AC vacuum pump.. Seem like decent stuff for a decent price to me so far

12:27 Did I just hear a cat hiss at something? lmao

They put the wrong valve cover on it. Should say 3406

Looks a bit small for a 3412 😂

3406 marked as a 3412 . I am having the same fuel problems with m C-12. Thanks for the education on where the fuel regulator is located.

Thanks

How'd they stuff 12 pistons in there? Must have double the power now.

Did they run out of 3406 decals?

I'd like to see a real 3412 stuffed into a truck!

Oh C10s and C12s I hate them so much. I had 2 trucks with them and the oil leaks out of the front structure and it cracking near the compressor and the cam followers killing the cam. I'm glad i got rid of them

The world you are looking for Is “diligent” as in “ you do your due diligence is checking tolerance before and after adjustment.

Horn doesn’t work? Just yell “honk!”

It was 41 degrees low here on the first day of summer, now it is a high of 100.

Nice video, I guess CAT used a 3412 because they ran out of 3406 covers 😂

They put 3412 valve cover on a 3406 that is embarrassing, come on factory workers take some pride in the greatest cat engine ever made. I love a 3412 just as much but those mistakes make me question quality control.

Great video thanks for sharing

Is the issue for the new engine in Smokey Red the 3412 label on valve cover when it's not a V12? I don't remember offhand but I think it's some flavor of 3406

The C-12 seems so simple compared to modern engines!

Good job

I’m thinking 3412 is a V-12…so they only sent it with half the cylinders.

3412? Well they're half right

Leave the 3412 label on there and see if anyone notices…😊

I'd say they shorted Smokey Red 6 of its cylinders on that new 3412. 😂🤣

That’s a very compact 3412! lol

Did they send you half of a 3412 or is that the result of CAT’s shrink ray technology? I really hope the guy (Iikely the boss’ nephew) responsible for the stickers doesn’t get to touch any of the internal parts of the engine.

I have question, sorry not quite about the video. I have started watching your videos and i love them! I just started a diesel mechanic job about 4 months working on school busses with no knowledge about mechanics really in general and they know this. I typically won't get any engine experience unless something were to go wrong and then i get to learn. I was wondering if there is anything without going to school atm to kinda fast track some engine experience without spending loads of money?

When you were manually turning the pump gears showing the slop, the bottom gear is moving on the shaft, shaft not turning, looks like it's keyed. Bet that key is nearly sheared for some reason.

It has a v12 tappet cover( D9l D10N R and I assume T motor) on a c15

New cat 3412-6? 😂

Could it be C-15 instead of 3412 ;)

That coolant sure was sparkling. Stop leak makes me worry alot.

Smokey Red's new engine is not a 3412. If it was, it would be a tighter fit in the frame.

Yes the 3412 label, 😂

Funny lookin 34 12

Uh yeah, missing 6 cylinders for that badge!

I guess honking, the horn is more of a safety feature

If that's a 3412, where is the other half??

Green antifreeze? Maybe perforation of liners or erosion of o-rings on liners. I have never seen correct green coolant for diesel engines. I could be wrong but my coolant was always red. Isn't a 3412 a marine engine of fairly high horsepower.

Around here the steer axle can't weight over 12,000 lbs.

RTV is Room Temperature Vulcanization

What's you opinion on cat c32 engine did you work on any c32 c27 Can you upload a video on generators

That speedometer in KM/h or is that a 140mph kenworth speedo

Never knew cat builded oposed piston engines.

Came to the video a couple of days late, but 3412 is a V12 engine. not a I6. lol

I wish I could post a picture I had one of those air jacks fail

Looks like the new engine is a six cylinder......not a twelve cylinder.😉

I wonder why and how those e-tracks are being used on the flatbed of that truck. Weird