"Purple Pete" C15 is LOCKED UP, but why? 

Thanks for watching. Sorry for the scratchy voice, but feeling fine though. Link to Amazon Affiliate Links for recommended tools: Amazon Affiliate Links to recommended tools: DEX FIT Gloves FN330: amzn.to/3AAsOq9 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 2 Pack M12 Style Batteries for Milwaukee: amzn.to/3D2mdHE Adjustable Height Parts Tray 100 lbs: amzn.to/3CBusZB Engine Oil and Fuel Dye UV: amzn.to/3z34zkv

It’s a CLIFFHANGER!

Hey new guy here I've been watching your channel and enjoy the content. I'm a mechanic up in Canada that worked at a FTL dealer for 20 plus years until recently switched to a fleet. Ty for the help from time to time. I can honestly say that you have helped me do some diagnostics in the past! Ty for that! 👍🇨🇦🔧

Brilliant as always 👍 looking forward to hearing the outcome.

Cool stache with the 2 pack of menthol voice. Hope your doing better and did not get sicker. My daughter was on the other side of the country in college and had some work done on her jeep, when they put it together they left a few things out like a sensor and a couple bolts. Stay safe and healthy.

Wonder if that Apu on the destruction video was a runaway. That's some major carnage on that little feller.

100 years ago or so I struggled with a case backhoe engine that had a liner protrusion problem. Case had different fire ring sizes so I used a depth mike to figure out what was needed and ordered the parts. It was somewhat hit or miss at first until I dug deep into the books. Good news I fixed the engine and got a lot of experience r+r of the head.

I could almost hear "The Naked Gun" theme music while that large toolbox was being navigated through the shop.

Love you video. Took me over an hour to watch it. Every 5 seconds my phone buffers. That's how you turn a 13-minute video in an hour event.

You are the CAT truck guru 🧙🏻‍♂️

RU-vid is really asking for it now days. Keep up the good work man

Wish I had a picture for destruction of the week. My brother recently took delivery of a New Cat 335 zero swing excavator. $400K machine. A young kid that was not supposed to run it, got in to move a bedding box. ( a steel box gravel is placed in to be placed around a pipe in a trench ) . He had the box close to the cab, and then tracked over a 2 ft high dirt mound. The bedding box came off the bucket teeth, into the cab. Broke all the glass out, and bent the front “A “ pillars of the cab. That is also the ROPS. ( roll over protection structure) 34 hours on the excavator ! It’s at Cat in Grand Junction Colorado now getting a new cab. The only good news, several machines use the same cab. So availability isn’t going to as big of an issue, as first thought.

Can't wait to see what went wrong. Thank you for all your work.

Liking the special effects on the toolbox move! That really sucks putting all that time and money into an engine just to do it all over again! Been there done that a couple times.

Looking at your shot reminds me of when I worked in R Bay at the CAT plant in Montgomery IL during summers as a temp while in law school. I hung the hydraulic tubes on the excavator and wheel loaders

Honestly i love how you read engines. That's a true skill.

Another excellent diagnosis on the engine so far & looking forward to the next episode. Thanks 🙏🏻

I remember after the rebuild on my former DDEC-4, lot's of blow-by, white smoke, and the failed bottle test, it was because the tech who reassembled the engine (not the same one who took it apart) was a low-hour fresh out of school with no supervision had installed the head gasket upside down which you can do on that engine. It was the original tech who tore it down the second time and it was he who made the discovery and the reason it became a warranty job which the shop paid 100%. On the engine you are now working on, I suspect an issue with liner protrusion or worse, a warped head since it was a short-block swap. Chances are they did not check the head for straightness before placing it on this engine. Only two things I can think of that can warp a head is overheating, or improper torquing of head bolts or torquing out of sequence. That's my two cents and I swear by it.

Hey Whiskers thanks for the video. Hopefully you feel better soon.

Love the mustache roll😂, and always love the information. Thank you for always going beyond what is just on the surface and showing details. Learned a lot from your videos

The stash is coming along nicely:) That is looking like a very expensive mustache . Thanks so much for the time you take teaching us common folk. I keep thinking of A million ways to die in the west movie and the mustache song now thx :0

Excellent Josh, thanks.

Great video, really enjoyed your Diagnostic skills !! You're an excellent Mechanic, wait for the next video !! Thanks Josh.

Your video's jus keep getting better and better ,this is exactly the problem I'm having with my boat motor,it's a volvo penta but same problem, I changed the head gasket and it lasted little over a year,but this time I know to look for clues while taking it apart again

Thank you Josh 🏆

Thanks for sharing!

Love your content brodie; trucker, been running Cats and Series 60s forever. While your info is Cat spec, its generally educational to any diesel-man. Thanks so much. Editing and voiceover is excellent BTW.

Thanks for the knowledge 👍

Thanks for your show 🙏

Thank you for not playing the music never did like it anyway. I like your videos.

After watching your videos for a while now, it makes me wish I'd stayed in the business and gone to work for Cat.

Ape you are the cat brain surgeon....💯 I love watchin you work 😁..truckers worst nightmare..40 grand I'm guessing

Hey Josh, I’m pretty good at troubleshooting those def problems. I’m at a cat dealer here in American Samoa. I think there is an updated version of the def pump now. The pump can also fail and push def in the harness all the way to the ecm. I love you videos!

I chuckled at the def injector comment on backhoe. Just did one on our 325F for same failure

Thanks for sharing

Good job guys

I love your videos brother. Thanks for them

Got lucky on that one in that it did it in the shop rather than risking a bent rod or other damage trying to start it elsewhere. Had that happen on my car with a direct injected gas engine that had a stuck injector. The pressure in the gas tank while it sat literally pushed all of the fuel into the motor, and all the oil in the crankcase went into the exhaust, and needless to say, it wasn't keen on turning over when I wanted to pull it into the garage to fix it. Just a click and the lights going dim.

Having had a hydro lock on my C7 due to a turbo failure this video hits home. Another informative and entertaining video from the Ape.

I haven't seen any guesses on the problem. I have zero experience with heavy duty engines but my brain immediately went to a warped head followed by improper torquing of the head bolts.

The evil handlebar twist

Good video as always. Looking forward to part 2.

Once I figure out the cylinder, I mark and check head bolt torque. This could be a warranty situation. That is why I like a reman long block, as if a head gasket joint failure occurs. It pushes a lot of blame on Cat as they installed the head. Of course it has to be a legal engine. Per Cat guide lines, all liners come out. All head bolts and spacer plate replaced. Flycut cracks I hate. PSI test the head and it is good, warranty won't pay unless it has failed into the coolant passage. What is your back log on cylinder heads? Longest one in our store, was ordered in August of last year. Waiting on one I ordered, (Dec of 2022) EST is March 13.

Those C15 6NZ engines are the best ever built. A buddy of mine had one, set at 425hp It would pull a house down, even set at 425hp Ran 2 million miles without ever having the head removed

We've had two 6NZ rebuilds lose a head gasket....the spacer between the head and block had water jacket holes not lining up ... js. We do in-house engine work so it's not the mechanics fault. Knowledge is power

you know you're a mechanic when you twist the stache righty tighty

Another great video👍🏾

Thanks!

Improperly torqued head bolts, that’s what I was told was wrong with my old cab over with a 5ek, 15k miles on it and blew the gasket. Got it with the rebuild already done, still can’t complain I only paid 10k for the truck and it had 440k original miles on it and it was kept in a shed used only for harvest season.

Back in the seventies I worked on a 1950 Chevy pickup that had been overheated and cracked the head. It got hydro lock when we tried starting after it cooled down. I pulled the head and replaced it but noticed the piston that hydro locked didn't go all the way to the top of the cylinder. Well it turned out the rod got bent when the piston got hydro locked.

this is more thrilling than a netflix series! 😱 im sure its going to need that expensive repair that those cat's need 😓...😿

Someone sure would be lucky to apprentice under your expertise!

Great news on no music👍

Our shop is a maccalister shop and it is packed full and it's a maze to make it through just like yours, must be a Cat thing !!

Hopefully cat has better luck with their remans than other brands. Many of the other brands seem luck to make it out the door before problems start. Gotta wonder if the other shop cut corners on the head.

Another educational video Thanks. I wished I lived close to your shop. The nearest cat shop is over a hour away, and they don`t have a very good reputation.

Very interesting. I would say improper install of sleeves but every cylinder pushing carbon on the gasket is the interesting part.

Have you ever thought of a way to optimize the storage or organization of engine parts as the engine is disassembled? I end up with little boxes and tubs and stuff everywhere and the work bench area is covered with harnesses, tubes and all sorts of stuff. I have obtained a grocery store stock cart for free that I intend to cut and modify into a 24 inch wide x 36 inch long by 60 inch tall multi shelf roll around. Heavy stuff like manifolds, turbos, heads would be on the lower shelf and lighter stuff like boxes of bolts at the top. Hope to keep things more organized.

Easy! Dropped liner! We see it all the time here in New Zealand! Trucks here are loaded to 132,000lb as standard so we are twisting blocks all the time

I forsee a beard being trimmed to reveal a proper mustache 🤔. Nice work and video. Thanks for sharing

So much great knowledge and I learn something every episode. I’m a cat mechanic too on the rental side in ohio at ohio cat. Keep up the great work

The suspense is killing me!!!!

excellent video will be waiting to see what was the reason for this failure.

Yay Boris 🎉🎉😂 I hope I don’t have a cracked one also

Holy cow

I work for carter cat 🐱 in Salem , va Monday will be fun . Got a few big projects going on .

One would think liner height should be good since it’s a reman block, but every other reman part is questionable these days. When I ran to Alaska there was a purple W900 up there and it was known as “The purple people eater”. 🤷‍♂️

As usual, awesome clip. It's not so awesome for the owner.

Maaaaaan..! How come “CAT” cannot get better control on “quality”..! The owner operators (and big company fleets) can’t overcome these types of issues…! “What thee actual F”…! Great video Josh, Thank you sir.

Damn that’s hell of a deal I’m setting here in Washington state right now with my c15 acert locked up

Well at least it is better than the 'Destruction of the Week'. 😱 it drove then I parked it ... FOREVER !

I'll take a wild guess on that Cummins destruction and say it was from a dowel pin that shook itself loose from the cover. Known problem since around 1989-2002 (I believe 2002 was the last year of that problem).

Us at Warren Cat completely did away with truck shop. They don’t let us touch them anymore.

That APU destruction was crazy. Maybe you can shout out for musically inclined folk to donate a music Licensed tune for you

3406b I had head gasket issues with it. The protrusion measured ok however the deck was eroded under the liners. #2 took a .063 shim to bring it back it was the worst one

This reminds me of OP From snowrunner game mod 🥰

Dang it. A cliffhanger!! That aint right!

4 has been my issue too

My toolbox wouldn't look anywhere near that nice if I had to push it around all the time 🤣

Hey I miss the intro music Love the sheep though Awesome video as usual Cheers from Australia

Remember being a mechanic is rocket science

@<a href="#" class="seekto" data-time="590">9:50</a> Mac Daddy arrives and everyone bows 😂

Does Cometic make gaskets for Cat and can you use them? I would think that the MLS gaskets would be better since they are multi layer steel gaskets.

*Adept Ape:* "There is no reason to put silicone on O-rings." *Skytrak:* LOL!!! JB-Weld it in or go home. Our Orings are just there for assembly purposes. Seriously. Every O-ring in them is just there to pretend it's holding the fluid in.

What model is your lord impact wrench used to take off the head bolts?

I've been there. My B model ran long enough to get me to the shop and pulled into the bay and then said that's it I'm done. It wasn't hydro locked from coolant but from another cause. With that being a Cat short block, is it still under warranty if the liner(s) have dropped? Keep up the great videos Josh!!

Hey Josh I am a diesel tech in training it’s showing all signs of a blown head gasket at least thats what I think

Looks like my CAT shop. More and more yellow iron and less trucks. Sad, But we have to keep trucking on.

we bought a cat tractor with a a3a c15 engine. We looked at it at the farmer yard and their tractor guy was there. It had coolant running down the side of the block and he said it was the water pump and they would fix. Turned out to be the head gasket but it was an external leak. They ate it and it has been good so far we have put about 400 hours on it. What would have caused? Would it have been liners? The tractor was worked hard for the first 10,000 hours. They had it chipped but we are not working it hard now. That engine is set at 450hp but we only need about 350 hp for our work. It was priced right and just had the transmission rebuilt.

Hey buddy your awesome

Without any interruptions what is a good time hour wise to remove the head from a single turtle C15

Some of those head bolts came out way easy…..

D434 Goldsmith!

I’m tired but I swear I saw multiple cracks in the liner!

Does not look like during the "rebuild" for this engine, they managed to put a new head gasket on. Gasket looked like it got a lot of miles on it.

Thank You Ape Man As John Lennon once said… I am The Ape Man, I am the Walrus Coo-Coo-Ka-Choo I’m working on Fathers beloved 60 Series Front cover leaks Front cover has never been off of this engine since new - 1998 All the gears were too tight No lash How she ran like that all these years I will never know! Plus since the rebuild , I checked the intakes valve lash, all of the intake valves on five cylinders - Too Tight - No lash The exhaust had lash, so I might get lucky, no burnt valves thank God. I’m a mineral spirits, parts brush using Don of a gun.. Lol Front cover leaks

Is there any benefit to running red vs green vs purple vs whatever color coolant?

I was thinking maybe the spacer plate was installed without double checking liner protrusion. 🤔

If this is a new replacement short block, wouldn't it still be covered under a warranty?

At my cat dealer they go ballistic if we don’t us the cat blue plugs or the bigger red ones.